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dV-DOSC dV-SUB Manual V3.0

June 2005

139

6. SPECIFICATIONS

6.1 dV-DOSC SPECIFICATIONS

L-ACOUSTICS specifications are based on measurement procedures which produce unbiased results
and allow for realistic performance prediction and simulation. Some of these specifications will appear
conservative when compared with other manufacturer's specifications. Measurements are conducted
under free field conditions and scaled to a 1 m reference distance unless otherwise specified.

Frequency response

(+/-3 dB)

160 Hz - 18 kHz (single unit)

100 Hz - 18 kHz (coupled array)

Full system bandwidth with SB218

25 Hz - 18 kHz

Sensitivity

(average SPL over component's rated bandwidth, equivalent to 2.83 Vrms at 1 metre)

MF

99 dB SPL

(100 - 800 Hz)

HF

109 dB SPL

(800 - 18k Hz)

Long Term Power Rating

(100 Hz HPF for low section, pink noise with 6 dB crest factor)

MF

55 Vrms

380 Wrms

1520 Wpeak

8 ohms

HF

23 Vrms

66 Wrms

260 Wpeak

8 ohms

Horizontal Directivity

120° (-6 dB points, symmetrical about main axis)

100° (-3 dB points, symmetrical about main axis)

Vertical Directivity

defined by the shape of the array

System Data

Continuous SPL

Continuous SPL

(flat array)

(max curvature array)

1 enclosure

127 dB

127 dB (vertical coverage not defined)

2 enclosures

133 dB

131 dB (15 degrees vertical coverage)

4 enclosures

139dB

135 dB (30 degrees vertical coverage)

COMPONENTS

MF

2 x 8'' weather resistant loudspeaker, 2'' voice coil, bass-reflex loaded

HF

1 x 1.4" neodymium compression driver, patented DOSC waveguide

CONSTRUCTION

Material

Baltic birch plywood, folded construction with aluminum top and
bottom plates and metal reinforcement. Sealed, screwed cabinet
construction. 3.75 degrees trapezoidal angle.

Finish

Maroon-gray™

Grill

Black epoxy-coated perforated steel, acoustically transparent foam

Features

Integrated flying hardware and handles

Dimension

(WxHxD):

695 mm x 257 mm (front) x 171 mm (rear) x 476 mm

(27.4 in x 10.1 in x 6.7 in x 18.7 in)

Weight

:

31.8 kg (70.1 lbs)

Shipping Dimensions

:

800 mm x 360 mm x 560 mm

(31.5 in x 14.2 in x 22 in)

Shipping Weight:

35 kg (77.2 lbs)

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Summary of Contents for dV-DOSC

Page 1: ...Version 3 0 June 2005 dV DOSC dV SUB OPERATOR MANUAL ...

Page 2: ......

Page 3: ...ign and system operation are also discussed in this document MANUAL ORGANIZATION The Introduction gives a brief presentation of dV DOSC and presents the fundamentals of Wavefront Sculpture Technology Chapter 1 introduces the elements of the dV DOSC system standard Chapter 2 describes dV DOSC array performance and coverage prediction Chapter 3 discusses sound design issues including subwoofer array...

Page 4: ...NS 31 1 3 dV DOSC RIGGING SYSTEM 32 1 4 dV SUB ENCLOSURE DESCRIPTION 34 1 5 dV SUB RIGGING SYSTEM 35 1 6 POWERING dV DOSC 37 1 7 POWERING SUBWOOFERS 38 1 8 dV DOSC AMP PANELS 39 1 9 dV DOSC AMPLIFIER RACKS 42 1 10 COMB CONNECTORS 44 1 11 CO24 CONTROL OUTPUT PANEL 48 1 12 MD24 MULTI DISTRO PANEL 49 1 13 CO6 CONTROL OUTPUT PANEL 49 1 14 APPROVED DIGITAL SIGNAL PROCESSORS 50 1 15 OEM FACTORY PRESETS ...

Page 5: ...operation 88 3 4 4 Time Alignment Flown Ground Stacked Subwoofers 89 3 4 5 Preset Selection Flown Ground Stacked Subwoofers 89 3 4 6 Large Format Flown Ground Stacked Subwoofer Configurations 90 3 5 SUBWOOFER ARRAYING TECHNIQUES 91 3 5 1 LEFT RIGHT CONFIGURATIONS 91 3 5 2 CENTRAL LINE ARRAY WITH ELECTRONIC DELAY PROCESSING 93 3 5 3 LEFT CENTRE RIGHT CONFIGURATIONS 94 4 INSTALLATION PROCEDURES 96 4...

Page 6: ... 16 dV DOSC array 31 Figure 17 dV ANGLE P1 and P2 angle values 32 Figure 18 dV BUMP and dV BUMP2 rigging bumpers 33 Figure 19 dV DOWN 33 Figure 20 dV SUB 34 Figure 21 dV ANGLESS sub to sub angle bar 35 Figure 22 dV ANGLESDP and dVANGLESD angle bars 35 Figure 23 Illustration of dV SUB rigging configurations 36 Figure 24 dV DOSC PADO4a Amplifier Rack Panel 39 Figure 25 dV DOSC PADO2a Amplifier Rack ...

Page 7: ... subwoofer time alignment 85 Figure 65 Physically coupled subwoofer configurations 86 Figure 66 Hybrid stacked flown dV DOSC dV SUB arrays and centre cluster 87 Figure 67 Hybrid flown stacked subwoofer configurations 88 Figure 68 Recommended time alignment location for flown dV SUB ground stacked L R subwoofers 89 Figure 69 Flown L R dV SUB options for larger system configurations 90 Figure 70 L R...

Page 8: ...t 41 Table 12 PADO2a Internal Amp Rack Wiring Chart 41 Table 13a dV DOSC DSP output channel assignment and COMB connector summary 5 1 format presets 44 Table 13b dV DOSC DSP output channel assignment and COMB connector summary 4 2 format presets 45 Table 14 2 way and 3 way stereo preset DSP output channel assignment and COMB connector summary 46 Table 15 Recommended Limiter Threshold Settings 55 T...

Page 9: ...ce area Performance expectations in terms of sound quality sound pressure level SPL and coverage consistency have progressively increased over the years while at the same time the size of the audience has grown inevitably leading to an increase in the number of loudspeakers In the past conventional horn loaded trapezoidal loudspeakers were typically assembled in fan shaped arrays according to the ...

Page 10: ...ture of the wavefront radiated by each source and the source separation WST coupling conditions can be summarized as follows An assembly of individual sound sources arrayed with regular separation between the sources on a plane or curved continuous surface is equivalent to a single sound source having the same dimensions as the total assembly if and only if one of the two following conditions is f...

Page 11: ...losure site angles should vary in inverse proportion to the listener distance geometrically this is equivalent to shaping variable curvature arrays to provide equal spacing of individual enclosure site angle impacts on the audience listening plane 5 Limits exist concerning the vertical height of each enclosure the minimum allowed listener distance and the angles that are allowed between enclosures...

Page 12: ...EP1 or dV ANGLEP2 rear angle bars by selecting various hole positions to produce variable curvature arrays A flat array is obtained using the maximum extension hole position on dV ANGLEP1 for all enclosures Array curvature obtained using dV ANGLEP is described as convex and the array shape corresponds to the positive curvature that we are familiar with If dV ANGLEN rear angle bars are selected con...

Page 13: ...of the high section Such a configuration is described as having coplanar symmetry Coplanar symmetry is the cylindrical domain equivalent of the coaxial arrangement for individual sound sources Essentially coplanar symmetry allows for homogeneous coverage of the sound field at any listening angle over the dV DOSC array s 120 horizontal coverage window Coplanar symmetry also eliminates off axis acou...

Page 14: ...ays Practically nearfield extension also means that extreme sound pressure levels are not required close to the system in order to obtain acceptable SPLs further back in the venue this is a highly desirable property that results in reduced potential for hearing loss for both audiences and engineers alike Nearfield extension combined with the precision and predictability of dV DOSC coverage is also...

Page 15: ...y reverberant acoustic conditions When combined with subwoofers for extended bandwidth applications dV DOSC can be used as a FOH system for small medium and large venues For these applications the 120 horizontal coverage provides excellent stereo imaging in the standard left right format while the flexibility provided by Wavefront Sculpture allows the sound designer to cover virtually any room geo...

Page 16: ...resentative CERTIFIED V DOSC ENGINEER CVE The higher level of qualification is Certified V DOSC Engineer or CVE In addition to satisfying the mission statement for QVTs the CVE has further expertise in the areas of sound design and system measurement as well as extensive real world experience with V DOSC The CVE has a complete theoretical understanding of all WST based systems including V DOSC ARC...

Page 17: ...ssing equipment In general the dV DOSC system is capable of producing sound from a line level signal in any concert situation System block diagrams are presented below to provide an overview of system connection and signal flow This is followed by identification of the individual components of the system and more detailed descriptions Please note that specific multi conductor connector selection f...

Page 18: ...Figure 5 dV DOSC 3 way system configuration ...

Page 19: ...dV DOSC dV SUB Manual V3 0 June 2005 19 Figure 6a dV DOSC 4 way system configuration option 1 COMB connector cabling ...

Page 20: ...dV DOSC dV SUB Manual V3 0 June 2005 20 Figure 6b dV DOSC 4 way system configuration option 2 COMB connector cabling ...

Page 21: ... DOSC BUMP2 see V DOSC manual for details can be used for stacking dV DOSC on top of V DOSC for upfill or for stacking dV DOSC standalone dV BUMP2 Alternative bumper for rigging dV DOSC and or dV SUB dV DOSC can also be stacked on top of dV BUMP2 with dV SUB and dV DOSC flown underneath dV DOWN Pair of rigging adapters for installing dV DOSC underneath V DOSC for downfill applications dV PIN25 Loc...

Page 22: ... 2 3 75 5 5 and 7 5 degrees dV ANGLESS Front and rear angle bar used to rig dV SUB to dV SUB i e SS sub to sub dV ANGLESD Front angle bar used to rig dV DOSC to dV SUB i e SD sub to dV or dV SUB to dV BUMP dV ANGLESDP Rear angle bar used to rig dV DOSC to dV SUB i e SDP sub to dV positive tilt Available angles include 0 1 75 3 75 degrees dV BUMP dV BUMP2 dV DOWN dV PIN81 dV ANGLEP1 0 2 3 75 5 5 7 ...

Page 23: ...ed bandpass loaded single 18 subwoofer for high SPL extended bandwidth Optional removable front dolly not shown recommended for touring applications SB118COV Protective cover for SB118 enclosures comes in pairs SB218 Front loaded bass reflex dual 18 subwoofer for high SPL extended bandwidth Optional removable front dolly not shown recommended for touring applications SUBCOV Protective cover for SB...

Page 24: ...0 Subwoofer Rigging Accessories AMPLIFICATION L ACOUSTICS LA24a Compact light weight two channel power amplifier 2 rack units 10 kg 1100 watts per channel into 8 ohms 1500 watts per channel into 4 ohms L ACOUSTICS LA48a Compact light weight two channel power amplifier 2 rack units 10 kg 1300 watts per channel into 8 ohms 2300 watts per channel into 4 ohms L ACOUSTICS LA24a L ACOUSTICS LA48a Figure...

Page 25: ... selecting 2 way 3 way or subwoofer operating modes 4x male XLR and 4x Speakon fanouts on the internal side for connecting to amplifier inputs and outputs Note PADO stands for PATCH DOSC PADO4a AMP PANEL Amplifier panel supplied with RK124a suitable for 4 amplifier rack configuration Two 8 pin female CA COM connectors for loudspeaker connection two male 19 pin CA COM connectors for signal distribu...

Page 26: ...dV DOSC dV SUB Manual V3 0 June 2005 26 RK12U PADOSEC RK122a PADO2a COMB CONNECTOR RK124a PADO4a Figure 12 Amplifier Rack Options and Accessories ...

Page 27: ...eturn snake 100 m 325 ft length fitted with 84 pin MASS connectors at each end used for connecting CONTROL OUTPUT panel typically located at FOH to MULTI DISTRO panel for signal distribution to the amplifier racks PCMCIA CARDS Contain OEM factory preset data for programming DSP units PCM224D PCM226D and PCM366D for XTA DP224 DP226 and BSS 366 respectively Other approved DSPs are programmed via com...

Page 28: ... 0 June 2005 28 CO24 CONTROL OUTPUT MD24 MULTI DISTRO CO6 CONTROL OUTPUT MC28100 MULTI DOM30 CROSS LINK DOM2 AMP LINK DOMF LINK BREAKOUT DOMM LINK BREAKOUT DOMP LINK EXTEND PCMCIA CARD Figure 13 Signal distribution and cabling ...

Page 29: ...or other 2 way fill enclosures to PADO2a or to PADO4a using DO2W and CC4FP SP25 F CABLE 2 way fill loudspeaker cable 4 conductor 4 mm2 conductor cross section 25 m 80 ft length equipped with 2x NL4 Speakon connectors for connecting dV DOSC or other 2 way fill enclosures to PADO2a or to PADO4a using DO2W and CC4FP DOFILL CA COM 8 pin male line receptacle to 2x NL4 Speakon connectors 3 m length for ...

Page 30: ...dV DOSC dV SUB Manual V3 0 June 2005 30 DO10P EXTENSION DOSUB CABLE SP7 SP25 CC4FP SP 7 DOFILL DO3WFILL DO2W DO3W Figure 14 Loudspeaker cabling options DO7 DO25 ...

Page 31: ...4 exit titanium diaphragm 3 diameter edgewound aluminum voice coil and a lightweight neodymium magnet These features combine to provide high sensitivity and power handling with low distortion over the entire operating bandwidth 800 18k Hz A removable rear panel allows access to the compression driver for servicing the diaphragm Each dV DOSC enclosure is provided with two Speakon connector sockets ...

Page 32: ...r can be added to provide an additional 8 pick points for single point hangs pick point hole numbering is 9 16 from front to rear or to allow for 2 point hangs with front and rear motors For 2 point hangs the front motor controls the array trim height while the rear motor controls the array site angle For a tightly wrapped array of 12 dV DOSC 90 degrees vertical coverage is obtained For this case ...

Page 33: ...2 EXTENSION BAR SINGLE POINT HANG FROM REAR EXTENSION BAR maximum 12 dV DOSC enclosures dV BUMP or dV BUMP2 EXTENSION BAR 2 POINT HANG FROM FRONT POINT AND EXTENSION BAR REAR POINT maximum 12 dV DOSC enclosures Figure 19 dV DOWN Up to 6 dV DOSC can be flown underneath V DOSC for downfill applications using the dV DOWN rigging adapter Three dV DOSC are equivalent to the weight of one V DOSC therefo...

Page 34: ... for the side 15 components is taken care of at the input terminal not at the speakers The dV SUB operating bandwidth is 40 Hz to 200 Hz with a useable bandwidth of 35 to 200 Hz measured under half space loading conditions The 15 components employed in dV SUB feature front and rear treatment of the cone body and all metal parts are corrosion treated to ensure weather resistant protection Other fea...

Page 35: ...t of the front dV DOSC points and 2 x dV ANGLESDP are used for attachment of the rear dV DOSC points along with 8 dV PIN25 Note dV ANGLESS and dV ANGLESDP have two different holes for connection to the dV SUB depending on whether dV DOSC is to be stacked on top of dV SUB or flown underneath The closest hole is for stacked applications while the further hole is for flown applications the need for d...

Page 36: ...les Table 1 Maximum rated dV SUB dV DOSC combinations dV DOSC flown below dV SUB Single point hang from rear extension bar holes 9 16 OR 2 point hang from dV BUMP front point hole 0 extension bar rear point hole 16 dV SUB 0 1 2 3 4 5 6 dV DOSC 12 6 4 1 0 0 0 Total weight 414 kg 912 lbs 290 kg 639 lbs 316 kg 697 lbs 309 kg 681 lbs 368 kg 811 lbs 460 kg 1014 lbs 552 kg 1217 lbs Table 2 Maximum rated...

Page 37: ... D POWER MLS SETTING LOAD REC D LA 17a LA 24a LA 48a LOAD REC D LA 17a LA 24a LA 48a ohms POWER ohms POWER 2 7 2280 1080 1635 2130 2 7 800 1080 1000 1380 do not use 0 dB 2 dB 0 dB 5 dB 5 dB 4 1520 840 1500 1600 4 520 840 600 830 do not use 0 dB 2 dB 0 dB 5 dB 5 dB 8 760 430 1100 820 8 260 430 300 430 do not use 0 dB 2 dB 0 dB 5 dB 5 dB Note Power handling for the dV DOSC low section depends on the...

Page 38: ... are summarized in Tables 6 7 and 8 for the SB118 dV SUB and SB218 respectively Table 6 SB118 Power Handling and Amplification SB118 ENCLOSURE RATINGS ONE SB118 TWO SB118 LOAD RMS PEAK REC D LOAD RMS PEAK REC D 8 600 2400 1200 4 1200 4800 2400 RECOMMENDED AMPLIFIER POWER POWER AMP MLS SETTING LOAD REC D LA 24a LA 48a ohms POWER 4 2400 1500 2300 do not use 0 dB 8 1200 1100 1300 0 dB 0 dB Table 7 dV...

Page 39: ...re for dV SUB dV DOSC low dV DOSC high respectively 3 WAY COMB connector lines 5 and 6 are assigned to 2 way fill low and high respectively 5 1 format presets Line 1 is reserved for SB118 or SB218 subwoofer drive SUB COMB connector lines 2 3 and 4 are for dV SUB dV DOSC low dV DOSC high respectively 3 WAY COMB connector Figure 25 dV DOSC PADO2a Amplifier Rack Panel The PADO2a amp panel is suitable...

Page 40: ...dV DOSC dV SUB Manual V3 0 June 2005 40 Table 9 PADO4a COMB Wiring Chart Table 10 PADO4a Internal Amp Rack Wiring Chart Figure 26 PADO4a amp rack wiring ...

Page 41: ...dV DOSC dV SUB Manual V3 0 June 2005 41 Table 11 PADO2a COMB Wiring Chart Table 12 PADO2a Internal Amp Rack Wiring Chart Figure 27 PADO2a amp rack wiring ...

Page 42: ... separate COMB connectors for both channels it is possible to assign the A channels and B channels independently When fully loaded 4 x LA48a plus PADO4a the RK124a rack can power up to 12 x dV DOSC 8 x SB218 or dV SUB subwoofers or 16 x SB118 subwoofers In terms of construction the amplifier rack is made of a lightweight aluminum space frame with heavy duty bracing internal shock mounting standard...

Page 43: ...8a plus PADO4a 4 x LA48a plus 2 x PADO2a Master Rack Slave Rack Figure 29 L ACOUSTICS Amplifier Rack Options a 4x LA48a plus PADO4a b 4x LA48a plus 2x PADO2a c Master Rack with DSP CO6 Control Output 2x LA48a PADO2a d Slave Rack with 2x LA48a PADO2a ...

Page 44: ...ay high D3WB 3W B signal lines 4 5 6 for sub 2 way low 2 way high DSUBA SUB A signal line 1 for sub drive DSUBB SUB B signal line 4 for sub drive DSUBTK is a set of 6 COMB connectors for implementing electronic arc delay processing of subwoofer arrays or for powering passive enclosures SUB T1 signal line 1 SUB T2 signal line 2 SUB T3 signal line 3 SUB T4 signal line 4 SUB T5 signal line 5 SUB T6 s...

Page 45: ...x SP10 SP25 2 x SP10 SP25 3 dV DOSC LA48a 4 SB218 LA48a 6 ARCS XT 2 dV SUB LA48a or 8 SB118 LA48a Figure 30 L ACOUSTICS RK122a amplifier rack channel assignments and cabling Operating modes amplifier rack channel assignments and cabling plus loudspeaker enclosure combinations for the L ACOUSTICS RK124a amplifier rack PADO4a plus 4 x LA48a are as follows dV DOSC HI dV DOSC HI SUB SUB 2W HI 2W HI dV...

Page 46: ...sources of error due to mispatching and in addition it is not necessary to repatch DSP outputs when changing between stereo 2 way and 3 way presets Operating modes amplifier rack channel assignments and cabling plus loudspeaker enclosure combinations for the L ACOUSTICS RK122a amplifier rack PADO2a plus 2 x LA48a are as follows 1 2 LO A HI A HI B HI A HI A HI B HI B 3 HI A 4 5 LO B LO A LO B LO A ...

Page 47: ... CC4FB SP10 25 DO2W CC4FB SP10 25 DO2W CC4FB SP10 25 3 3 dV DOSC ARCS XT 3 3 dV DOSC ARCS XT 3 3 dV DOSC ARCS XT 3 3 dV DOSC ARCS XT Figure 34 L ACOUSTICS RK124a amplifier rack channel assignments and cabling for 2 way stereo presets HI A HI B SUB A SUB B LO A LO B SUB A SUB B SUB A SUB B SUB A SUB B SUB A SUB B SUB A SUB B 3W A SUB A 3W B SUB B DO10 DO25 DO10 DO25 DO10P DO10P DO3WFILL DO3WFILL DO...

Page 48: ...l since small and medium systems will adhere to the same channel assignment standards and are considered as subsets of the large scale setup A large scale dV DOSC system can consist of Left Left L L Left L Right R and Right Right R R arrays Each of the four arrays can have associated 2 way fill enclosures and SB218 subwoofers Therefore each L L L R and R R array requires 6 drive channels 2 for dV ...

Page 49: ...tions are performed for the A and D lines to accommodate Left Left and Right Right arrays as necessary Separating signal distribution lines to individual L L L R and R R arrays is also an effective way to avoid potential ground loop problems 1 13 CO6 CONTROL OUTPUT PANEL The CO6 Control Output panel is a scaled down 6 channel version of the 24 channel CO24 panel that is suitable for 2 way or 3 way...

Page 50: ... determining optimum dV DOSC presets detailed polar measurements and weighted spatial averaging are used to determine component equalization crossover points and time alignment delays for example As a result dV DOSC presets give the user an optimum starting point system tuning should be done using band attenuation subwoofer time alignment and system equalization using input parametric filters not ...

Page 51: ...dV DOSC plus dV SUB with a variety of crossover points available between dV SUB and the dV DOSC low section 80 120 and 200 Hz The 80 Hz crossover point is intended for applications where dV SUB and dV DOSC are physically separated eg ground stacked subwoofers with flown dV DOSC The 120 Hz crossover point is considered optimal in terms of power bandwidth for both dV SUB and the dV DOSC low section ...

Page 52: ...utput 4 dV DOSC high section input A Output 5 fullrange input A Output 6 SB218 ground stacked input B Note For all 5 1 format 4 way presets output 6 can be used for auxiliary sub drive via input B Note The crossover frequency between the flown dV SUB and dV DOSC low section is 120 Hz to optimize the power bandwidth for both sections for all 4 way presets Version 7 preset names and descriptions for...

Page 53: ...V DOSC low section dV 3WX SB118 80 Hz crossover between SB118 and dV DOSC low section dV 3W SB218 120 Hz crossover between SB218 and dV DOSC low section dV 3WX SB218 80 Hz crossover between SB218 and dV DOSC low section Figure 40 Time alignment guidelines for 3 way SB118 and SB218 presets ...

Page 54: ...een SB118 and dV SUB dV DOSC dV SUB SB118 X SB118 25 80 Hz negative polarity dV SUB 30 120 Hz dV DOSC dV SUB SB218 INFRA 60 Hz crossover between SB218 and dV SUB dV DOSC dV SUB SB218 X SB218 25 80 Hz negative polarity dV SUB 30 120 Hz Figure 41 Time alignment guidelines for 4 way presets ...

Page 55: ... SUB 2 7 1200 4800 2400 80 5 8 29 8 dBu dV DOSC LO 8 380 1520 760 78 0 8 01 7 dBu dV DOSC HI 8 66 264 132 32 5 0 41 1 dBu AMP CLIP IS AT 9 5 dBu LIMITER THRESHOLDS CALIBRATED TO RMS POWER HANDLING ENCLOSURE NOM LOAD RMS POWER PEAK POWER RMS POWER EQUIV Vrms dBu EQUIV LIMITER MODEL ohms W W W volts 32 dB gain SETTING SB218 4 1100 4400 1100 66 3 6 61 6 dBu dV SUB 2 7 1200 4800 1200 56 9 5 28 5 dBu d...

Page 56: ... DOSC LO A dV DOSC HI A SB218 B dV dVS SB118 i LO 4 way A 28 SB118 A dV SUB A dV DOSC LO A dV DOSC HI A dV dVS SB118 i HI 4 way A 29 SB118 A dV SUB A dV DOSC LO A dV DOSC HI A dV dVS SB118 X LO 4 way A 30 SB118 A dV SUB A dV DOSC LO A dV DOSC HI A dV dVS SB118 X HI 4 way A 31 SB118 A dV SUB A dV DOSC LO A dV DOSC HI A dV dVS SB218 i LO 4 way A 32 SB218 A dV SUB A dV DOSC LO A dV DOSC HI A dV dVS S...

Page 57: ...ay stereo 27 SB218 A dV DOSC LO A dV DOSC HI A SB218 B dV DOSC LO B dV DOSC HI B dV dVS SB118 i LO 5 way A 1 B 28 SB118 A dV SUB A dV DOSC LO A dV DOSC HI A FULL A SB118 B dV dVS SB118 i HI 5 way A 1 B 29 SB118 A dV SUB A dV DOSC LO A dV DOSC HI A FULL A SB118 B dV dVS SB118 X LO 5 way A 1 B 30 SB118 A dV SUB A dV DOSC LO A dV DOSC HI A FULL A SB118 B dV dVS SB118 X HI 5 way A 1 B 31 SB118 A dV SU...

Page 58: ... HI A FULL A SB118 B DVS118 X H 5 A 1 B 23 SB118 A dV SUB A dV DOSC LO A dV DOSC HI A FULL A SB118 B DVS218 I L 5 A 1 B 24 SB218 A dV SUB A dV DOSC LO A dV DOSC HI A FULL A SB218 B DVS218 I H 5 A 1 B 25 SB218 A dV SUB A dV DOSC LO A dV DOSC HI A FULL A SB218 B DVS218 X L 5 A 1 B 26 SB218 A dV SUB A dV DOSC LO A dV DOSC HI A FULL A SB218 B DVS218 X H 5 A 1 B 27 SB218 A dV SUB A dV DOSC LO A dV DOSC...

Page 59: ...18 A dV SUB A dV DOSC LO A dV DOSC HI A dV dVS SB118 i HI SB118 A dV SUB A dV DOSC LO A dV DOSC HI A dV dVS SB118 X LO SB118 A dV SUB A dV DOSC LO A dV DOSC HI A dV dVS SB118 X HI SB118 A dV SUB A dV DOSC LO A dV DOSC HI A dV dVS SB218 i LO SB218 A dV SUB A dV DOSC LO A dV DOSC HI A dV dVS SB218 i HI SB218 A dV SUB A dV DOSC LO A dV DOSC HI A dV dVS SB218 X LO SB218 A dV SUB A dV DOSC LO A dV DOSC...

Page 60: ...erage of individual 1 3 octave polar plots over an 800 20k Hz bandwidth and then re formatting the information on a linear scale Unlike a standard polar plot which corresponds to the SPL versus angle referenced to the on axis level at a given frequency the isocontour is more useful for practical coverage prediction Note The 800 20k Hz bandwidth is selected for calculation of the dV DOSC isocontour...

Page 61: ... by a HF enhancement For longer throw distances this tilt in tonal balance is offset by air absorption in open air situations and by both building material absorption and air absorption indoors resulting in spectrally balanced sound over the largest area possible This is an important benefit of dV DOSC and WST since both SPL and tonal balance are more even with distance Since the flat array config...

Page 62: ...ed to be progressively reduced however such attenuation results in a global loss of energy Variable Curvature dV DOSC Array Since individual dV DOSC enclosures radiate a flat isophasic wavefront it is possible to focus energy in a given direction and increase the SPL by reducing the angles between enclosures Conversely by increasing the angle between enclosures up to a maximum of 7 5 it is possibl...

Page 63: ...ts In general all input data should be entered into the cells in black Results are displayed in red Note In order to run ARRAY 2004 Macro Security should be set at medium in Excel i e from the main menu bar select Tools Macro Security Security Level Medium Note A complete description of ARRAY2004 is beyond the scope of this manual For further information participation in a dV DOSC Training Seminar...

Page 64: ...r determining delay time settings during system tuning for locating laser beams during array trim and angle adjustment and on the golf course on days off In some cases tribune or balcony elevations can be determined by measuring individual step depth height and then counting the number of steps to calculate the section depth elevation The ROOM DIM sheet is provided in ARRAY 2004 to assist in calcu...

Page 65: ...gle provided that a 3 75 angle bar is used at the rear to connect enclosure 1 to the bumper to compensate for the trapezoidal angle of the enclosure The 3 75 angle should always be used to attach the top dV DOSC to dV BUMP this allows a laser and or remote digital inclinometer to be mounted on the dV BUMP to set the focus of the top enclosure The designer then chooses the angular spacing between e...

Page 66: ... array 4 5 degrees between all enclosures 0 5 10 10 5 0 5 10 15 20 25 30 35 40 45 50 55 60 Figure 46 b Cutview showing constant enclosure site angle impact spacing for an 8 enclosure variable curvature dV DOSC array inter enclosure angles 1 1 2 3 3 75 5 5 7 5 degrees Figure 46 c Plan view representation of non constant a versus constant spacing b Optimum coverage is obtained iteratively by varying...

Page 67: ...he appropriate pick point and whether the dV BUMP extension bar is required Note Always verify the actual obtained array tilt angle using a digital inclinometer during installation If a 3 75 degree angle is used between the top dV DOSC and dV BUMP then the angle of dV BUMP corresponds to Site 1 to Next for the selected pick point If the actual obtained site angle measured with a digital inclinomet...

Page 68: ...s Note When simulating dV DOSC downfill or upfill using ARRAY2004 there will appear to be a physical alignment offset with respect to V DOSC This is normal and is due to the different coordinate system references used for V DOSC versus dV DOSC since the rigging systems are rear pivoting versus front pivoting Even though the display in ARRAY2004 may appear incorrect DOSC waveguides are physically a...

Page 69: ... the top V DOSC Note To obtain the 0 degree relative angle the 3 75 degree hole on dV ANGLEP1 must be used during installation For upfill purposes the 5 5 or 7 5 degree holes can also be selected on dV ANGLEP1 When using 5 5 or 7 5 degree holes set autofocus adjust 1 75 degrees or 3 75 degrees respectively This is necessary to compensate for the 3 75 degree trapezoidal angle of the first dV DOSC e...

Page 70: ...unweighted SPL of the array at a user selected distance enter the distance in the black cell This calculation is based on a 200 Hz reference frequency and correlates well with the unweighted SPL as opposed to the A weighted enclosure by enclosure SPL estimate The peak unweighted SPL for a single array as well as an estimate of the peak unweighted SPL for 2 arrays is also given Note Unweighted SPL ...

Page 71: ... so that only half the room needs to be defined and after coordinates are entered the display of the audience area is updated when the SCALING button is pressed It is only necessary to define Contour 1 however Contour 2 is useful to represent balconies stage thrusts proscenium opening FOH location etc When V DOSC and dV DOSC arrays are defined in V ARRAY1 2 and dV ARRAY1 2 Cutview sheets respectiv...

Page 72: ...ith the H ISOCONT sheet first in order to predetermine the 0 and 60 degree axes prior to more detailed cutview simulation Output Data Output data is directly displayed as the projection of the horizontal isocontour on the defined audience area The A weighted SPL and amount of headroom in the system are given for each array Note that the displayed isocontour for each array is terminated in a line t...

Page 73: ...dV DOSC dV SUB Manual V3 0 June 2005 73 CUTVIEW SHEET HORIZONTAL ISOCONTOUR SHEET Figure 54 ARRAY 2004 spreadsheet calculation example ...

Page 74: ...orcement design using coaxial loudspeakers the goal is to align filled circles in order to have even coverage Mapping mode provides a color coded representation of the SPL distribution over the defined room geometry and allows for visualization of the coverage of individual loudspeakers as well as the interference between multiple loudspeakers In mapping mode the user can select individual 1 3 oct...

Page 75: ...250 Hz 4 kHz 500 Hz 6 3 kHz 1 kHz 8 kHz 2 kHz 10 kHz Figure 55 Plan view SPL mappings at octave band frequencies for 12 dV DOSC 30 metre throw distance enclosures perpendicular to target plane ...

Page 76: ...Unweighted SPL Map A Weighted SPL Map 1 10 kHz SPL Map Figure 56 Impact coverage and SPL mappings unweighted A weighted 1 10 kHz bandwidth for 12 dV DOSC 30 metre throw distance enclosures perpendicular to target plane ...

Page 77: ...ht should be selected to provide a 4 1 ratio between the throw distances to the furthest and closest members of the audience Such a trim height tends to make it easier to satisfy WST Condition 4 and thus obtain optimum SPL distribution Offstage coverage is another consideration when selecting array trim height in general the best results are obtained when the top dV DOSC enclosure has a zero degre...

Page 78: ... to install the system further upstage the initial distance attenuation loss to the first few rows will help provide better SPL distribution throughout the entire audience without the need to attenuate the mid or high sections of lower enclosures which will affect the overall output of the system To summarize the bottom of the stacked array should be higher than the audience more than 2 m or 6 5 f...

Page 79: ...vation and the top dV DOSC enclosure has a zero degree site angle Conversely for the hybrid flown stacked configuration theatre sound reinforcement the trim height of the flown system should be selected so that the bottom dV DOSC cabinet has a zero degree site angle and is at the same height as the listening level for the first row of the balcony audience This helps avoid reflections from the balc...

Page 80: ...15b 112XT 115XT or 115XT HiQ loudspeakers are also highly effective in complementing dV DOSC system coverage 3 2 1 THE LEFT RIGHT CONFIGURATION Although not the best technical solution the left right configuration meets both visual and practical criteria and is most commonly used dV DOSC is a dramatic improvement over conventional systems but by nature the stereo imaging of any left right system i...

Page 81: ...e amount of overlap and stereo imaging see the V DOSC manual for further details There are also tradeoffs with respect to intelligibility when aiming arrays Psychoacoustically improved intelligibility is obtained when the isocontours of both arrays do not overlap too much Provided that audience coverage is correct intelligibility is optimal when only one array radiates on a given audience area If ...

Page 82: ...arrays can be panned offstage up to 100 degrees to optimize coverage and intelligibility For theatrical sound reinforcement the 120 degree coverage of dV DOSC is highly suited to centre cluster applications since there is a good match between C system coverage and overall L R coverage for the typical 12 15 metre L R array separation that occurs in theatres 20 10 0 10 20 10 0 10 20 30 Figure 60 LCR...

Page 83: ...o a greater portion of the audience while de correlating the signals between adjacent arrays to further reduce audible interference effects i e arrays can be run in cross panned stereo and fed as follows L L right program signal L left program signal R right program and R R left program The main L R FOH arrays are normally physically larger than the LL RR offstage fill arrays and act as the refere...

Page 84: ...porate events For more demanding music program material rock rap techno etc SB218 or SB118 subwoofers should be added and the system operated in 4 way mode to provide a more suitable low frequency contour Type of Installation Recommended quantities remain standard when the system is ground stacked When dV SUBs are flown with dV DOSC as a low frequency extension additional ground stacked subwoofers...

Page 85: ...ral Subwoofer Line Array LCR Configuration Figure 63 Flown dV DOSC and ground stacked SB218 3 way system configurations As illustrated in Figure 64 for flown dV DOSC and ground stacked subwoofers time alignment of subwoofers is required due to the geometric path difference between the two systems The distance from the measurement microphone to the subwoofers is dSUB while the distance to the flown...

Page 86: ...mnidirectional than dV DOSC at lower frequencies and if used up to 120 Hz or 200 Hz reduced gain before feedback may result The 120 Hz crossover point is optimal in terms of power bandwidth for both dV SUB and the dV DOSC low section and is intended for all closely coupled flown or stacked configurations Note For the same reason 3W presets are recommended for all closely coupled dV DOSC and SB118 ...

Page 87: ...stacked floor system Fig 65c Alternatively the dV BUMP2 accessory allows dV DOSC to be stacked on top of the bumper to provide balcony coverage and dV DOSC flown underneath dV SUBs to provide floor coverage Fig 65e In this case the two dV DOSC arrays individually provide balcony and floor coverage while both benefit from the low frequency energy provided by dV SUBs Note For hybrid stacked flown sy...

Page 88: ...e delay processed central line array to provide improved flexibility and control Note As an alternative to the central line configuration shown in Fig 67a individual SB218s can be spaced apart and used as part of a distributed front fill system The stacked L R subwoofer configuration shown in Fig 67b proves a convenient location for stereo front fill enclosures for example dV DOSC ARCS or MTD XT c...

Page 89: ...acked Subwoofers For 4 way mode operation two types of presets are available INFRA and X Separate processing is provided for flown versus ground stacked subwoofers and presets have the following output channel assignments Output 1 SB118 or SB218 ground stacked input A Output 2 dV SUB flown input A Output 3 dV DOSC low section input A Output 4 dV DOSC high section input A Output 5 fullrange input A...

Page 90: ... In addition the trim height is carefully selected and rigging points physically offset relative to the dV DOSC array in order to prevent lower dV DOSC enclosures from firing into lower dV SUB enclosure walls Standard 4 way presets INFRA or X can be used for this configuration In Fig 69b the dV SUB array is flown behind the dV DOSC array Pre delay is applied to the dV DOSC array in order to time a...

Page 91: ...nner i e with minimum front surface area or in a vertical column as in Fig 70b there is reduced center build up and fewer horizontal lobing problems compared with the results obtained using two L R horizontal subwoofer line arrays as shown in Fig 70e not recommended Basically interference effects between two omnidirectional sources Figs 70 a b are less dramatic than between two directive sources F...

Page 92: ... ground stacked subwoofer arrays recommended for open air festival applications c L Wrap L R ground stacked subwoofer arrays d Curved L R ground stacked subwoofer arrays e L R horizontal line arrays Figure 70 L R Ground stacked subwoofer arraying techniques Figure 71 Flown L R subwoofers integrated with dV DOSC offstage fill arrays ...

Page 93: ...ity of a central ground stacked horizontal line array is to use delay processing to electronically arc the array Electronic delay processing in this manner will decouple sections of the array so that tonal balance is improved up close while at the same time low frequency coverage is smoother throughout the audience in the horizontal plane The optimum arc radius is typically equal to half the lengt...

Page 94: ...microphone located between FOH L dV SUBs and ground stacked L subwoofers at a distance where the SPL from the low section of the flown system equals the SPL from the ground stacked subwoofers iii duplicate time alignment settings for R subwoofers and FOH R iv if applicable time align LL and RR arrays to L and R respectively performing measurements in a representative location where main and off st...

Page 95: ...distributed ground stacked subwoofer configuration which can also be used with electronic delay processing For further details on electronic delay processing please see Section 3 5 2 and the V DOSC manual a Ground stacked LCR b Ground stacked LCR stereo infill C c Flown L R ground stacked stereo infill C d Ground stacked L R flown C e Centre line with electronic delay processing FOH L R dV SUB arr...

Page 96: ...ons ratchet strap the dV BUMP and V DOSC bumper assembly to the stacking platform whenever possible Once the floor location for the stacked array has been determined dV BUMP is attached to the V DOSC BUMPER by mating the two locating studs on dV BUMP with the corresponding holes on the center cross bar section of the V DOSC BUMPER A steel stud and dV PIN81quick release pin are then used to mechani...

Page 97: ...t of the cabinet not perpendicular to the trap angle As a sighting guide attach a dV ANGLE bar with 3 75 degrees at the rear of the top enclosure and a second dV ANGLE with 7 5 degrees at the front of the top enclosure Visually lining up the tops of the two dV ANGLE bars provides a sighting guide that is perpendicular to the front of the top enclosure Looking from the rear of the array and sightin...

Page 98: ...sition ii dV BUMP locator studs mate with holes iii dV BUMP mounted inside V DOSC BUMP iv Insert locator pin v Use dV PIN81 to secure locator pin vi Overview of dV BUMP secured to V DOSC BUMP vii Attach rear screwjacks to V DOSC BUMP viii Select 3 75 deg for rear points ...

Page 99: ...pin rear points note by pre selecting the angle the tab on dV ANGLEP1 acts as a stop xiii Pre attach two more dV ANGLE bars at desired angle xiv Stack the second dV DOSC enclosure xv Pin front points first rear points last using dV PIN25 xvi Use dV ANGLE at 3 75 rear and 7 5 front as a site for adjusting the focus of the stacked system Figure 75 Stacking dV DOSC using dV BUMP plus the V DOSC bumpe...

Page 100: ...ons selecting the minimum 7 5 degree hole position tightly wrapped will provide 3 75 degrees tilt upwards with respect to the top V DOSC enclosure while selecting the 5 5 degree hole position will provide 1 75 degrees Note For upfill applications the trapezoidal angle of the bottom dV DOSC enclosure must be taken into account The 3 75 degree angle provides the same site angle for the bottom dV DOS...

Page 101: ...dV DOSC dV SUB Manual V3 0 June 2005 101 i dV BUMP and V DOSC BUMPER ii Raise and level the V DOSC BUMPER iii Place dV BUMP inside V DOSC BUMPER iv Attach locator pin into position using dV PIN81 ...

Page 102: ...005 102 v Attach rear dV ANGLE and mount the first enclosure vi Continue to build the stack vii Note bridling arrangement in front viii Entire system is now ready to fly Figure 76 Stacking dV DOSC on top of V DOSC for upfill longthrow ...

Page 103: ...n dV BUMP and select the desired tilt angle downwards Note dV ANGLE N bars can be selected if greater than 3 75 degrees downwards tilt is required this is provided by the 0 degree hole position on the dV ANGLE P1 bar note that the site angle is referenced perpendicular to the front of dV DOSC and not the trap angle of the enclosure Orienting the first dV DOSC enclosure with the rigging tabs down g...

Page 104: ...005 104 i Note circular discs on dV BUMP ii These mate with stacking runner recesses on SB218 iii dV BUMP placed into position iv Double stud to ring fitting attached to SB218 flytrack alternative run a ratchet around the entire stack ...

Page 105: ...V SUB Manual V3 0 June 2005 105 v Ratchet strap secures dV BUMP to the SB218 vi Rear dV ANGLE pre attached at desired angle vii Bottom dV DOSC mounted attached using dV PIN25 viii Pre attach next set of dV ANGLE ...

Page 106: ... June 2005 106 ix Second dV DOSC placed into position x then secured using dV PIN25 front first then rear xi Use dV ANGLE N instead of dV ANGLE P1 xii for more downwards tilt Figure 77 Stacking dV DOSC on top of SB218 subwoofers ...

Page 107: ...t the second dV SUB and crown the bottom front edge once stacked it is then possible to rotate lower the dV SUB into position by using the dV ANGLESS as locators that mate with the slots on the dV SUB rigging panels of the first enclosure Note This procedure is recommended as opposed to placing dV ANGLESS on the first enclosure then lowering the second into position Due to the weight of the second...

Page 108: ...dV DOSC dV SUB Manual V3 0 June 2005 108 Repeat the same procedure to stack 3 dV SUBs high The stack secured using 8 dV ANGLESS and 16 dVPIN25 Figure 78 Stacking dV SUB subwoofers ...

Page 109: ...e dV SUB stack and physically secure the enclosures using dV ANGLESS angles between cabinets and or a ratchet strap around the entire stack Physically securing dV SUBs will provide extra stability during the dV DOSC stacking procedure and will also prevent subs from moving during the show With reference to the photo sequence that follows pre attach 2 x dV ANGLESD at the front of the top dV SUB and...

Page 110: ...front and dV ANGLESDP rear to dV SUB ii Note The fat part of dV ANGLESD and dV ANGLESDP is oriented towards the center of dV SUB on both sides iii Place dV DOSC in position inverted and secure the front 2 points iv Lift dV DOSC into position and secure with dV PIN25 ...

Page 111: ... Pre select the angle pre attach dV ANGLE P1 or P2 for the second dV DOSC enclosures and continue to build the stack vi The finished stack of dV SUB and dV DOSC Figure 80 Stacking dV DOSC on top of dV SUB subwoofers without dV BUMP or dV BUMP2 ...

Page 112: ...rigging tabs down grille logo in the correct orientation place the enclosure on dV BUMP by mating the front rigging tabs and rear locator slots with the locator slots and rear dV ANGLE P1 P2 or N bars that were previously attached to dV BUMP Attach all four points using four dV PIN25 front pair first rear pair last to secure the bottom dV DOSC to dV BUMP The next step is to connect two more dV ANG...

Page 113: ...rear attachment points ii dV DOSC installed note how dV ANGLEN provides downwards tilt iii 3 high dV SUB stack provides a good height as a stacking platform With the bottom enclosure at maximum downwards tilt coverage starts from 2 metres onwards Figure 81 Stacking dV DOSC on top of dV SUB subwoofers with dV BUMP or dV BUMP2 ...

Page 114: ...ched using rotating legs and U pins except the attachment points are at the front in this case Place dV BUMP or dV BUMP2 at the top of the array oriented so that the rear extension bar slot is facing upwards If desired attach the extension bar to dV BUMP using an 18 mm shackle at pick point hole number 8 on the central spreader bar section The extension bar allows the use of two motors for tilt ad...

Page 115: ... ground in order to prevent it from swinging Gradually lift the array until it is freely floating in air If you are doing a single point hang use a digital inclinometer to verify that the tilt angle of the top enclosure is correct before taking the array up to trim If adjustment is required lower the array and change the pick point until the desired tilt is obtained Re calculate the trim height in...

Page 116: ...dV DOSC dV SUB Manual V3 0 June 2005 116 i dV DOSC lined up in FLIGHT dV cases ii Pin the fronts of all dV DOSC using dV PIN25 iii Use 3 75 degree for rear when attaching dV BUMP ...

Page 117: ...SC dV SUB Manual V3 0 June 2005 117 iv Pre attach all rear dV ANGLE ball tab end up v Pre select the desired angle vi dV BUMP attached dV ANGLE pre attached vii Connect dV DOSC enclosures in groups of three ...

Page 118: ...dV DOSC dV SUB Manual V3 0 June 2005 118 viii Lower detail between adjacent blocks of 3 dV DOSC ix As cabinets lift off x Pin adjacent blocks of 3 together as the gaps close ...

Page 119: ... dV BUMP xii Front view of the flown array xiii Single point hang from rear point on extension bar gives 90 degrees coverage with 12 dV DOSC xiv 90 degrees vertical coverage running from parallel to vertical with respect to floor level Figure 82 Rigging dV DOSC standalone with dV BUMP or dV BUMP2 ...

Page 120: ...ed on the bottom enclosure elevation which was pre calculated using ARRAY2004 or SOUNDVISION Once the array is at trim and focussed the tape measure can be pulled free Under dark conditions indoors a small flashlight can be attached at the junction between the top and the second enclosures The final trim angle adjustment can then be checked from the rearmost seats of the audience when the light ca...

Page 121: ... DOSC are followed please see the V DOSC manual for complete details Fly the V DOSC array in the normal manner but do not connect the angle straps of the bottom V DOSC enclosure Flip down the rotating legs balanciers of the bottom V DOSC enclosure in preparation for attachment to dV DOWN Remove the FLIGHT dV case cover and wheel 3 dV DOSC into position face down As a reference for cabinet orientat...

Page 122: ...cks At this point the system is ready to be taken up to trim and the installation completed by verifying trim height and focus During de installation the procedure is reversed Loosen the screwjacks remove the bottom V DOSC enclosure angle straps and then land the dV DOSC enclosures face down in their flight case as the system is lowered i Pre attach dV DOWN on either side of dV DOSC ii Use dV PIN2...

Page 123: ...B Manual V3 0 June 2005 123 v Attach dV DOWN using U PIN and locking safety vi Preconnect all dV ANGLE at the rear of dV DOSC vii Pin all dV DOSC at the rear using dV PIN25 viii Connect ANGLE straps on bottom V DOSC ...

Page 124: ...dV DOSC dV SUB Manual V3 0 June 2005 124 ix Raise the ARRAY note the gap x Tighten screwjacks to remove this gap xi dV DOSC flown under V DOSC Figure 84 Rigging dV DOSC below V DOSC for downfill ...

Page 125: ...om the front on the central spreader bar will produce a dead hung array i e approximately zero degree tilt angle Hole numbers 6 7 or 8 can be used for downwards tilt Raise the first dV SUB enclosure off the ground with sufficient clearance to position the next dV SUB enclosure underneath Pre attach 4 x dV ANGLESS to the second dV SUB enclosure using 4 x dV PIN25 Slowly lower the first dV SUB into ...

Page 126: ...Lower 1st dV SUB into position and attach using 4 dV PIN25 Figure 85 Rigging dV SUB Standalone ...

Page 127: ...n Physically connect the fronts of all dV DOSC enclosures by attaching the front points using pairs of dV PIN25 The entire assembly is then physically linked similar to how V DOSC is attached using rotating legs and U pins except the attachment points are at the front in this case Referring to the angle values that were pre calculated for each enclosure using ARRAY 2004 or SOUNDVISION pre attach p...

Page 128: ...e top enclosure is correct before taking the array up to trim If adjustment is required lower the array and change the pick point until the desired site angle is obtained Table 20 EXAMPLE PICK POINT REFERENCE CHART 1 dV SUB 3 dV DOSC 7 5 deg between all dV DOSC dV BUMP Hole 0 front 16 rear 1 8 center 9 16 ext bar dV BUMP Site Angle top dV DOSC site angle provided 3 75 deg selected between top dV D...

Page 129: ...rear points only dV SUB to dV DOSC vi Houston we have liftoff vii Lift dV DOSC into position secure front points using 2 x dV PIN25 viii The flown array Figure 86 Rigging dV DOSC under dV SUB small configuration ...

Page 130: ...fat part of the angle bars is oriented towards the center of dV SUB in order to mate properly with the dV DOSC rigging panels Line up all dV DOSC enclosures in their flight cases 3 per case Mate the bottom rigging tabs from the first group of 3 cabinets with the top locator slots of the next group of cabinets Repeat until all dV DOSC flight cases are physically lined up Physically connect the fron...

Page 131: ...ng dV BUMP The fat part of the dV ANGLESD is oriented towards the center of dV SUB on both sides and since there are no stacking runners on the top of dV SUB it is possible to select the stacked hole position on the dV SUB end of dV ANGLESD The dV BUMP is then placed in position and secured using 4 x dV PIN25 The chain motor is attached to dV BUMP using an 18 mm shackle and the first dV SUB enclos...

Page 132: ...dV SUB with dV BUMP attached using 4 x dV ANGLESD and 8 dV PIN25 ii Second dV SUB with 4 x dV ANGLESS pre attached iii 2 x dV SUB physically connected iV dV ANGLESD front and dV ANGLESDP rear pre attached ...

Page 133: ... attach the dV DOSC 2 to dV DOSC 1 vi All dV DOSC attached at front in blocks of 3 at the rear except for dV DOSC 1 to 2 vii dV DOSC 2 to 1 then blocks of 3 are attached as the array is raised viii The flown system 2 dV SUB 6 dV DOSC Figure 87 Rigging dV DOSC under dV SUB larger configuration procedure 1 ...

Page 134: ...blocks of 3 ii Flip dV DOSC onto dV SUB dolleys to position under the dV SUB array iii Standalone dV SUB techniques see above are used to fly the dV SUB array iv dV DOSC front point attachment using dV ANGLESD The array is raised and rear points attached using dV ANGLESDP ...

Page 135: ...dV DOSC dV SUB Manual V3 0 June 2005 135 v The procedure is repeated for subsequent blocks of 3 dV DOSC Figure 88 Rigging dV DOSC under dV SUB larger configuration procedure 2 ...

Page 136: ...OSC combinations dV DOSC flown below dV SUB Single point hang off central spreader bar dV SUB 0 1 2 3 4 5 6 6 dV DOSC 24 9 8 7 6 4 1 0 Total weight 786 kg 1732 lbs 389 kg 858 lbs 448 kg 988 lbs 507 kg 1118 lbs 566 kg 1248 lbs 592 kg 1305 lbs 585 kg 1290 lbs 552 kg 1217 lbs All rigging should be performed by certified trained personnel Proper chain motor installation and operation is absolutely nec...

Page 137: ...commended Maintenance Tools APPLICATION dV DOSC SERVICE TOOLS As Required 2 Phillips screwdriver MF Speaker Mount 4 mm hex key HF Diaphragm Mount 4 mm hex key DOSC Waveguide Mount Bolt 10 mm socket 5 3 SPARE PARTS Speakers dV DOSC HF driver complete HP BC22 dV DOSC HF diaphragm HS BC22 dV DOSC 8 loudspeaker HP PH81 dV DOSC 8 recone kit HS PH81 dV SUB 15 loudspeaker HP PH153 dV SUB 15 recone kit HS...

Page 138: ...rline XPRO or equivalent one for each array required FOR DISTANCE MEASUREMENTS Laser Rangefinder Binoculars Bushnell Yardage Pro or equivalent Laser Rangefinder Leica Disto Classic or Hilti PD22 or equivalent 20 m 50 ft tape measure for setting array trim height PORTABLE COMPUTER SOUNDVISION Excel for ARRAY 2004 WinMLS SMAART or MLSSA measurement software sound card measurement mic preamp DSP cont...

Page 139: ...zontal Directivity 120 6 dB points symmetrical about main axis 100 3 dB points symmetrical about main axis Vertical Directivity defined by the shape of the array System Data Continuous SPL Continuous SPL flat array max curvature array 1 enclosure 127 dB 127 dB vertical coverage not defined 2 enclosures 133 dB 131 dB 15 degrees vertical coverage 4 enclosures 139dB 135 dB 30 degrees vertical coverag...

Page 140: ...0 3 4 127 2 280 4 5 159 0 350 5 6 190 8 420 6 7 222 6 490 7 8 254 4 560 9 9 286 2 631 0 10 318 0 701 1 11 349 8 771 2 12 381 6 841 3 13 413 4 911 4 14 445 2 981 5 15 477 0 1051 6 16 508 8 1121 7 17 540 6 1191 8 18 572 4 1261 9 19 604 2 1332 0 20 636 0 1402 1 21 667 8 1472 2 22 699 6 1542 3 23 731 4 1612 4 24 763 2 1682 6 Table 25 dV DOSC weight per number of cabinets ...

Page 141: ...dV DOSC dV SUB Manual V3 0 June 2005 141 dV BUMP Net Weight 22 5 kg without extension bar 49 6 lbs 32 0 kg with extension bar 70 5 lbs Figure 91 dV BUMP Line Drawing ...

Page 142: ...139 dB peak 2 enclosures 139 dB cont 145 dB peak 4 enclosures 145 dB cont 151 dB peak COMPONENTS 3 x 15 weather resistant loudspeaker 3 edgewound copper ribbon voice coil vented bandpass loaded die cast aluminum basket massive vented magnet structure high thermal capacity CONSTRUCTION Dimension WxHxD 695 mm x 708 mm x 695 mm 27 4 in x 27 9 in x 27 4 in Weight 93 kg 205 lbs Shipping Dimensions 795 ...

Page 143: ...dV DOSC dV SUB Manual V3 0 June 2005 143 Figure 92 dV SUB Line Drawing ...

Page 144: ...satisfied over the majority of the 8 operating bandwidth Figure 93 Front view of dV DOSC array and vertically stacked DOSC waveguides We have to fulfil the first WST criterion at higher frequencies since it is not possible to satisfy the second WST criterion i e the wavelengths are too small to have the acoustic centers of adjacent components within λ 2 This is achieved by mounting a DOSC waveguid...

Page 145: ...th to be the same value at the rectangular exit of the device The internal plug is a truncated conical piece that looks like a tomahawk This plug and its outer housing are precisely constructed according to specific ratios between depth height and cone angle in order to produce a flat constant phase wavefront Tight manufacturing tolerances are obtained through the use of computer aided design and ...

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