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L-Acoustics 112XT, Operator'S Manual, Page: 8 / 51

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L-Acoustics 112XT Operator'S Manual Download Page 8

L-ACOUSTICS XT Manual V1.1 

2/11/2003 

7

 

XT RIGGING ACCESSORIES 

(7) ETR112XT  

Adjustable U-Bracket for ceiling, wall or scaffold mounting of the 112XT in either horizontal or 

vertical orientations 

(8) CPL112XT 

Coupling adapter bars used in conjunction with ETR112XT to array two 112XT enclosures 

vertically with independent tilt adjustment for both enclosures 

(9) ETR115XT  

Adjustable U-Bracket for ceiling, wall or scaffold mounting of the 115XT in either horizontal or 

vertical orientations 

(10) CPL115XT 

Coupling adapter bars used in conjunction with ETR115XT to array two 115XT enclosures 

vertically with independent tilt adjustment for both enclosures 

(11) XTLIFTBAR 

Allows for single point rigging of 112XT or 115XT loudspeaker enclosures with 5 pick points 

available for tilt adjustment

 

(12) PION 2 

Double stud Aeroquip flytrack fitting-to-ring for permanent installation of 112XT or 115XT 

enclosures or for use in conjunction with ETR112XT or ETR115XT as a safety attachment 

LOUDSPEAKER CABLES 

(13) F-CABLE (SP7, SP25) 

Loudspeaker cable, 4 conductor, 4mm

2

 conductor cross-section, 7 m (20 ft) or 25 m (80 ft) 

length, equipped with 2 x Speakon connectors 

(14) F-LINK CABLE (SP.7) 

Loudspeaker link cable, 4 conductor, 4mm

2

 conductor cross-section, 0.7 m (2 ft) length, 

equipped with 2 x Speakon connectors (for paralleling XT enclosures). 

 

 

112XT 

 

115XT 

Summary of Contents for 112XT

Page 1: ...Version 1 1 February 2003 L ACOUSTICS XT LINE 112XT 115XT OPERATOR MANUAL...

Page 2: ...sufficient for most applications however should you require further assistance your distributor or L ACOUSTICS are available to provide additional technical support MANUAL ORGANIZATION The Introductio...

Page 3: ...L ACOUSTICS XT Manual V1 1 2 11 2003 2...

Page 4: ...T ENCLOSURES 26 4 3 ARRAYING XT ENCLOSURES 27 4 4 PREDICTING XT COVERAGE 30 4 5 DISTRIBUTED SOUND REINFORCEMENT 30 4 5 1 OVERHEAD DISTRIBUTED SYSTEMS 30 4 5 2 DELAY SYSTEMS 30 4 5 3 COMPLEMENTARY FILL...

Page 5: ...XT coupling adapter installation procedure 39 Figure 20 XTLIFTBAR installation procedure 40 Figure 21 112XT Line Drawing 44 Figure 22 112XT ETR112XT Line Drawing 45 Figure 23 112XT XTLIFTBAR Line Draw...

Page 6: ...enclosure design that cannot be used in single or very small configurations A different set of loudspeaker enclosure design specifications apply that are more suited to the multiple source sound desi...

Page 7: ...12XT 115XT loudspeaker enclosures XT rigging accessories and SB115 SB118 SB218 or dV SUB subwoofers OEM factory presets are provided for approved digital signal processors XTA DP224 DP226 and BSS 366...

Page 8: ...y two 115XT enclosures vertically with independent tilt adjustment for both enclosures 11 XTLIFTBAR Allows for single point rigging of 112XT or 115XT loudspeaker enclosures with 5 pick points availabl...

Page 9: ...L ACOUSTICS XT Manual V1 1 2 11 2003 8 ETR112XT ETR115XT CPL112XT CPL115XT XTLIFTBAR PION2 F CABLE DO7 F LINK CABLE DO 7 Figure 1 XT System Components...

Page 10: ...lly high performance floor monitor solution When used with the SB118 or other L ACOUSTICS subwoofers XTs are also excellent for side fill and drum monitoring applications OEM factory presets are avail...

Page 11: ...nclosure is oriented at a 45 degree angle with respect to vertical allowing the enclosure to be used as a floor monitor Enclosure weight is 27 kg 59 5 lbs Cabinet construction consists of 30 mm 1 18 i...

Page 12: ...the 115XT is oriented at a 41 degree angle with respect to vertical allowing the enclosure to be used as a floor monitor Enclosure weight is 29 5 kg 65 0 lbs Cabinet construction consists of 30 mm 1...

Page 13: ...i e full continuous power will never be delivered to the HF section due to this attenuation When the same amplifier is used for the HF section the extra available power then translates into headroom f...

Page 14: ...XT LOW SECTION AMPLIFIER OUTPUT POWER REC D POWER MLS SETTING LOAD POWER LA 17a LA 24a LA 48a ohms W 2 2320 do not use do not use 2400 2 dB 2 7 1740 1080 1635 2130 0 dB 0 dB 2 dB 4 1160 840 1300 1600...

Page 15: ...gs for 115XT 115XT ENCLOSURE RATINGS ONE 115XT TWO 115XT THREE 115XT FOUR 115XT SECTION LOAD RMS PEAK REC D LOAD RMS PEAK REC D LOAD RMS PEAK REC D LOAD RMS PEAK REC D LOW 8 250 1000 500 4 500 2000 10...

Page 16: ...dB 0 dB 4 dB 4 1000 840 1300 1000 0 dB 2 dB 4 dB 8 500 430 700 520 0 dB 2 dB 4 dB Table 7 Recommended power amplification and MLS switch settings for 115XT high section 115XT HI SECTION AMPLIFIER OUTP...

Page 17: ...70 1200 L ACOUSTICS LA 24a POWER MATRIX L ACOUSTICS LA 48a POWER MATRIX MLS SWITCH SETTING MLS SWITCH SETTING LOAD CONFIGURATION 5 dB 4 dB 2 dB 0 dB LOAD CONFIGURATION 5 dB 4 dB 2 dB 0 dB 16 ohms Ster...

Page 18: ...mm2 conductor cross section 11 gauge SP25 cables can be used for 25 meter cable runs to power a 4 ohm load 2 x 112XT or 115XT enclosures in parallel while maintaining a damping factor greater than 20...

Page 19: ...y control confidentiality and to maintain the integrity of L ACOUSTICS system presets Restricting access to presets is in no way meant to restrict flexibility or the creative process on the contrary s...

Page 20: ...xceeds 1 THD for any reason voltage or current clipping the limiter reduces the input signal proportionally 2 msec attack 150 msec release Under normal operation clip limiting is inaudible and L ACOUS...

Page 21: ...and MONITOR while two types of 3 way presets are available for the use of XT enclosures with L ACOUSTICS SB115 SB118 SB218 or dV SUB subwoofers 3W and 3WX All 2 way presets are configured in stereo 3...

Page 22: ...o 25 SB115 A 112XT LOW A 112XT HI A SB115 B 112XT LOW B 112XT HI B 112XT 3WX SB115 3 way stereo 26 SB115 A 112XT LOW A 112XT HI A SB115 B 112XT LOW B 112XT HI B 112XT 3W SB118 3 way stereo 27 SB118 A...

Page 23: ...A 112XT LO B 112XT HI B 112XT 3W SB115 3 way A SUB B 25 SB115 A 112XT LO A 112XT HI A SB115 B 112XT 3WX SB115 3 way A SUB B 26 SB115 A 112XT LO A 112XT HI A SB115 B 112XT 3W SB118 3 way A SUB B 27 SB1...

Page 24: ...LO B 112XT HI B 112XT 3W SB115 3 way A SUB B 16 SB115 A 112XT LO A 112XT HI A SB115 B 112XT 3WX SB115 3 way A SUB B 17 SB115 A 112XT LO A 112XT HI A SB115 B 112XT 3W SB118 3 way A SUB B 18 SB118 A 11...

Page 25: ...6 SB115 A 112XT LOW A 112XT HI A SB115 B 112XT LOW B 112XT HI B 112 X 115 3 A 3 B 17 SB115 A 112XT LOW A 112XT HI A SB115 B 112XT LOW B 112XT HI B 112 SB118 3 A 3 B 18 SB118 A 112XT LOW A 112XT HI A S...

Page 26: ...B 23 dV SUB A 112XT LOW A 112XT HI A dV SUB B 112XT LOW B 112XT HI B 112 X dVS 3 A 3 B 24 dV SUB A 112XT LOW A 112XT HI A dV SUB B 112XT LOW B 112XT HI B 115XT FIL 3 A 3 B 25 FULL A 115XT LOW A 115XT...

Page 27: ...tions 4 2 AIMING XT ENCLOSURES Due to their controlled directivity behavior XT enclosures should be aimed so as to geometrically cover the desired audience area with the main zero degree axis roughly...

Page 28: ...ng coaxial technology Note for color versions of figures 11 12 13 and 15 please see the XT manual PDF file that is available for download from www l acoustics com 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kH...

Page 29: ...of 3 meters Interference now occurs lower in frequency and will tend to be masked by room reverberation Compared with the closely spaced arrayed system of Fig 12 there is now improved intelligibility...

Page 30: ...case corresponds to the SPL mappings shown in Figure 15 works corresponds to Figure 12 and best corresponds to Figure 13 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz Figure 15 SPL mappings at octave band f...

Page 31: ...TEMS XT enclosures are highly suited for delay system installation in order to cover large audience areas When installing delay systems there are a few principles that should be followed 1 Over delayi...

Page 32: ...sures can be stacked on top of a central line array of subwoofers or any other object of suitable height provided that the height of the HF section is appropriate for audience coverage Typically a sta...

Page 33: ...ximity fill enclosure For 3 way operation of 112XT or 115XT loudspeaker enclosures with SB115 SB118 SB218 or dV SUB subwoofers there are two different types of preset available 1 3W presets optimize t...

Page 34: ...e wrt vertical 90 deg coverage PERFORMER HEIGHT Performer Monitor Monitor Monitor cm ft in cm ft in cm ft in 160 5 ft 3 in 160 5 ft 3 in 160 5 ft 3 in 165 5 ft 5 in 165 5 ft 5 in 165 5 ft 5 in 170 5 f...

Page 35: ...or the subwoofer and the 112XT or 115XT low section please see Section 4 8 for further details 4 8 USING XT WITH SUBWOOFERS For most music applications 112XT or 115XT enclosures should be used with SB...

Page 36: ...presets have an 80 Hz LR24 low pass filter for the subwoofers and an overlapping LR24 high pass filter for the XT low section 45 Hz HPF for 112XT 40 Hz HPF for 115XT Due to the overlap in the operati...

Page 37: ...ions in 3 way mode or with separate AUX drive for the subwoofers since the subwoofers can be used with positive polarity and this helps to simplify installation and system tuning If more low frequency...

Page 38: ...ailable on the center section of the ETR112XT and ETR115XT for bracket mounting Pole mount adapter plates on 112XT and 115XT enclosures allow for 10 degree angular resolution Note When using ETR112XT...

Page 39: ...UPLING ADAPTER BAR ATTACHMENT The CPL112XT or CPL115XT coupling adapter bars are optional accessories that can be used in conjunction with ETR112XT or ETR115XT U brackets to array two 112XT or 115XT e...

Page 40: ...ing of the CPL112XT 8 Attach lower locking pins on both sides of the lower 112XT to facilitate angling of the CPL112XT 9 Release lower locking pins to perform final angling of the lower 112XT once CPL...

Page 41: ...shackle location provides tilt angles of 14 7 0 7 14 degrees front to back Figure 20 XTLIFTBAR installation procedure 5 4 SAFETY RULES Always ensure that the ETR112XT or ETR115XT rotating arm is secu...

Page 42: ...teps 2 5 for LOW and SUB channels 7 turn off the pink noise Set all amplifier output levels to 0 dB gain Un mute all crossover output channels and the system is ready for use Remember the old saying a...

Page 43: ...should be done on an annual basis for systems not subjected to demanding use For systems being used on a daily basis for sub hire or touring enclosures should be checked every month or even more frequ...

Page 44: ...d high frequency contours under freefield conditions FILL preset provides nominally flat response under freefield conditions 3W preset applies a 100 Hz high pass filter Components LF 1 x 12 weather re...

Page 45: ...L ACOUSTICS XT Manual V1 1 11 02 03 44 Figure 21 112XT Line Drawing...

Page 46: ...L ACOUSTICS XT Manual V1 1 11 02 03 45 Figure 22 112XT ETR112XT Line Drawing Figure 23 112XT XTLIFTBAR Line Drawing...

Page 47: ...L ACOUSTICS XT Manual V1 1 11 02 03 46 Figure 24 112XT ETR112XT 112CPLXT Line Drawing 0 degree Figure 25 112XT ETR112XT 112CPLXT Line Drawing 30 degrees...

Page 48: ...quency contours under freefield conditions FILL preset provides nominally flat response under freefield conditions 3W preset applies a 100 Hz high pass filter Components LF 1 x 15 weather resistant lo...

Page 49: ...L ACOUSTICS XT Manual V1 1 11 02 03 48 Figure 26 115XT Line Drawing...

Page 50: ...L ACOUSTICS XT Manual V1 1 11 02 03 49 Figure 27 115XT ETR115XT Line Drawing Figure 28 115XT XTLIFTBAR Line Drawing...

Page 51: ...L ACOUSTICS XT Manual V1 1 11 02 03 50 Figure 29 115XT ETR115XT 115XTCPL Line Drawing 0 degrees Figure 30 115XT ETR115XT 115XTCPL Line Drawing 30 degrees...

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