Nexo GEO T Series CD18 User Manual Download Page 67

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Summary of Contents for GEO T Series CD18

Page 1: ...GEO T Series T4805 5 Tangent Array Module T2815 15 Tangent Array Module CD18 Directional Sub bass User Manual ...

Page 2: ...s is not the case with GEO where careless installation produces catastrophic results AGEOTangentArrayisnota linearray GEO Technology is equally effective in designing and deploying tangent horizontal arrays or curved vertical arrays For best results in a specific application the user needs to know how multi speaker arrays interact with audience geometry along with the benefits and drawbacks of cur...

Page 3: ...nment 41 4 6 Driving the CD18s from the AUX send 42 5 GEO T Tangent Array System Check List 44 5 1 Are the NX242 Digital TDcontrollers properly configured 44 5 2 Are the amplifiers properly configured 44 5 3 Are the amps and the NX properly connected 44 5 4 Are the speakers properly connected and angled 45 5 5 Final Pre Sound Check Check 45 6 Technical Specifications 46 6 1 GEO T4805 Vertical Tang...

Page 4: ...sive acoustic resistance radiator and a 3 voice coil 1 4 Throat Neodymium 16 Ohm HF Driver with a 15 Hyperboloid Reflective Wavesource The near field building block for curved vertical tangent arrays 1200 mm 47 24 750 mm 29 53 750 mm 29 53 CD18 Cardioid Dipole Sub bass Two 18 45cm Long Excursion Neodymium 6 Ohm Drivers each controlled by one DSP channel producing a 110 x 110 Super Cardioid pattern...

Page 5: ...are essential to ensure proper audience coverage when installing a GEO Tangent Array GEOSoft Array Design Software simplifies the design and implementation of vertical tangent GEO arrays Please consult the NEXO web site www NEXO fr or www NEXO sa com for the latest software releases Please devote your time and attention to reading this manual A comprehensive understanding of GEO theory tangent arr...

Page 6: ... back of each cabinet The EP6 AP6 connectors are linked in parallel within the enclosures see the Connections Diagrams section of this manual EP6 AP6 Pin 1 2 3 4 5 6 GEO T4805 Rear 8 LF 32 Ω 1 Negative 2 Positive Front 8 LF MF 32 Ω 3 Negative 4 Positive 1 4 HF 16 Ω 5 Negative 6 Positive GEO T2815 Not connected Through Front 8 LF MF 32 Ω 3 Negative 4 Positive 1 4 HF 16 Ω 5 Negative 6 Positive IMPOR...

Page 7: ... or equal to 4 of the load impedance damping factor 25 the maximum cable length is given by Lmax Z x S S in mm2 Z in Ohm Lmax in meters The table below indicates these values for 3 common sizes Load Impedance Ω 2 3 4 6 8 12 16 Cable section Maximum Length meters 1 5 mm AWG 14 3 4 5 6 9 12 18 24 2 5 mm AWG 12 5 7 5 10 15 20 30 40 4 mm AWG 10 8 12 16 24 32 48 64 2 1 4 Examples The GEO T4805 LF secti...

Page 8: ...mplifier should be capable of delivering 5200 Watts into a 6 Ohm load typically the same amplifier as for the HF section but in Bridged Mono mode LF MF front section NEXO recommends that the amplifier should be capable of delivering 5200 Watts into a 6 Ohm load typically the same amplifier as for the HF section but in Bridged Mono mode 2 2 2 GEO T2815 recommended amplification GEO T2815 is rated f...

Page 9: ...ins the higher the power the greater the gain Various other brands may offer constant gain but only within a given product range for example they may fit fixed input sensitivity only on their semi professional amps Even if a manufacturer applies the constant gain rule to all models the value selected will not necessarily be the same as that chosen by other manufacturers Some products can exhibit m...

Page 10: ...pedance that can be connected is reduced by half due to the fact that current capability is doubled Typically only channel 1 input is active NEXO does not recommend Parallel Mono Mode for any GEO T or CD18 amplification 2 4 3 Advanced protection Some high end amplifiers may include signal processing functions similar to those found in the NX242 TDcontroller loudspeaker offset integration limiter c...

Page 11: ...ocessing switches off Which gives a total of 7 identical amplifiers for such a cluster IMPORTANT Former NX241 TDcontroller GEO T presets Gain structure has changed from load 2 13 to load 2 14 Loads 2 13 and below the NX242 expects all amplifiers to have the same overall gain add 6 dB gain to the HF section to compensate for LF rear and LF MF rear sections bridge operating mode 6 dB gain Loads 2 14...

Page 12: ...xtreme care Only persons who are fully conversant with the operation of the GEOT CD18 Rigging System and provided with suitable safety equipment should deploy GEO Arrays Misuse of the GEOT CD18 Rigging System could lead to dangerous consequences Used and maintained correctly the GEOT CD18 Rigging System will give many years of reliable service in portable systems Please take the time to read and u...

Page 13: ...e as for the installation Pack GEOT CD18 components carefully to prevent damage in transit 3 1 2 Ground Stacking Safety Statistically many more injuries occur due to unstable ground stacked PA systems than those associated with flown systems There are several reasons for this fact however the message is clear Always survey the supporting structure upon which a ground stack is to be built Always lo...

Page 14: ...tts 01060 U S A Phone 413 585 9869 Fax 413 585 9872 school rigstar com ESTA Entertainment Services Technology Association 875 Sixth Avenue Suite 1005 NEW YORK NY 10001 USA Phone 212 244 1505 Fax 212 244 1502 info esta org www esta org 3 2 General Description Each GEO T Array Module includes an individual rigging system which is mounted at the NEXO factory Six BLGEOT12 30 push pins are provided wit...

Page 15: ...bumper set angles between cabinets When the array is lifted into position all cabinets are at 0 and it is only when the pull up force is applied that the correct angles are obtained Compression mode can be applied either with articulated kelping beam Compression Mode Full Kelping Beam or with fix beam and chain lever hoist Compression Mode Half Kelping Beam TENSION MODE COMPRESSION MODE 3 3 Tensio...

Page 16: ...g front and rear upper axis fixed beam and ensure that these axes are properly locked with the R clips supplied Lift the Kelping Beam and position the bumper below it Lower the Kelping beam so that the front beam load pin holes are aligned with the bumper load pin holes see drawing KELPING BEAM TO BUMPER SETUP Connect the Kelping Beam to the bumper with the two axes through the corresponding holes...

Page 17: ...ong hole is used for 0 125 0 20 0 315 0 5 and 0 8 angle settings The angle between a cabinet and the one below it is adjusted using the linking bar from the upper cabinet and the tension mode setting holes in the lower cabinet Lift bumper and top GEO T4805 assembly and position the next GEO T4805 below the assembly Lower the bumper and top GEO T4805 assembly carefully until the first and second GE...

Page 18: ...nwards and into the lower GEO T4805 s side rigging plate see drawing One operator must then lift the rear of the bottom GEO T while the angle settings push pins are inserted by the second operator on each side of the cabinet Once the angle setting push pins are inserted lower the rear of the lower GEO T the angle between the two GEO T4805 s is now correct Check that all push pins are locked and th...

Page 19: ...y and allowing the cabinets to close together supported from above by the motor hoist Take care during this procedure to keep hands and fingers clear of the rigging system 3 3 5 Last GEO T4805 to first GEO T2815 IMPORTANT Unlike GEO T 4805 GEO T2815 does not have the 0 safety position The linking bar has two oblong holes When the linking bar is in tension mode position the upper oblong hole and th...

Page 20: ... positioned Connect the speaker links Check the bottom cabinets according to the Checklist procedure described later in this manual 3 3 7 Positioning the cluster If one motor hoist only is used the bridle chain length must be adjusted for the correct bumper angle prior to cluster lift Lift the GEO T array to the height determined in GeoSoft GeoSoft array height definition is for the top surface of...

Page 21: ...at a cable should not be accidentally forgotten when the system is separated Damage to the connector will occur should this mistake be made While holding the rear of the bottom GEO T 2815 remove the linking bar push pins Remove front push pins linking the two last cabinets while supporting the bottom cabinet Remove the bottom GEO T2815 Repeat for all GEO T2815 NB when one cabinet is removed always...

Page 22: ...ll cabinets Remove the GEO T bumper Remember to replace all the pins back in their respective beams 3 4 Compression Mode Full Kelping Beam Setup Compression mode Full Kelping Beam requires the following accessories GEO T Main Bumper GEOT BUMPER GEO T Kelping Beam GEOT KELPBEAM GEO T Bottom Bumper GEOT BTBUMPER GEO T Kelping Chain GEOT BCCH GEO T KELPING CHAIN GEO T MAIN BUMPER GEO T BOTTOM BUMPER ...

Page 23: ...les are aligned with the bumper load pin holes see drawing KELPING BEAM TO BUMPER SETUP Connect the Kelping Beam to the bumper with the two axes through the corresponding holes see drawing above and ensure that these are properly locked with the R clips Attach one end of the GEO T Kelping Chain to the Kelping Beam rear lower axis NB the GEO T Kelping chain has a clutch assembly 0 5 meter from one ...

Page 24: ...pins provided with the bumper check that all push pins are in their locked position Ensure that no objects have been placed accidentally on the top of the bumper as they may fall when the system is lifted 3 4 3 First to second GEOT 4805 In Compression Mode the linking bars must remain inside their respective cabinet side rigging plates Angles between one cabinet and the one below are adjusted usin...

Page 25: ... allows convenient access to the linking bars and the angle setting holes Release the linking bar push pin from its storage position typically 0 125 when stored in flight cases rotate the linking bar within the side rigging plate and position the linking bar oblong hole in front of the required angle value hole and insert the push pin Repeat the angle setting procedure on the opposite side of the ...

Page 26: ...inserted in the position marked Safety Pin Must Be Inserted see drawings below Check the array according to the Checklist procedure described later in this manual 3 4 5 Last GEO T4805 to first GEO T2815 IMPORTANT Unlike GEO T 4805 GEO T2815 does not have the 0 safety position Compression Mode only applies to GEO T4805 GEO T2815 s must always be installed in Tension Mode Follow the instructions giv...

Page 27: ...anually raise the Bottom Bumper until it is approximately parallel with the ground and set the adjustable clutch in the Kelping Chain Link so that the chain is taught Make a final check that the Kelping Link Chain is correctly installed and store the surplus chain in the chain bag supplied The chain bag should be clipped to the clutch adjuster assembly The rear motor hoist may now be raised to app...

Page 28: ...aking the system down is just a case of doing the reverse procedure to flying the array However there are some important factors to consider Lower the array running the two motor hoists simultaneously until the bottom cabinet is just off the floor Run the rear motor hoist down until there is no tension on the GEO T kelping chain and no compression on the system Disconnect the GEO T kelping chain f...

Page 29: ... This ensures that the lowest cabinet does not hit the flight case extrusion if the case is mis aligned Remove front and rear push pins from the two last cabinets and carefully lift the array using both motor hoists until the array is clear Ensure the array is vertical at all times Repeat the procedure for all cabinets Remove the GEO T kelping chain from the GEO T Kelping Beam the GEO T kelping be...

Page 30: ...nnecting axis Store Rear Beam Link the motor hoists to the Kelping Beam using front and rear upper axis fixed beam and ensure that these axes are properly locked with the R clips supplied Lift the Kelping Beam and position the bumper below it Lower the Kelping beam so that the front beam load pin holes are aligned with the bumper load pin holes see drawing KELPING BEAM TO BUMPER SETUP Connect the ...

Page 31: ...per FIRST GEO T4805 TO BUMPER ASSEMBLY Position the bumper on the first GEO T4805 so that the bumper side slot A is at the rear Link the GEO T4805 to the bumper using the four 12mm x 35mm push pins provided with the bumper depress the button at the rear of the pin to release the locking mechanism insert the pin fully and release the button Link the GEO T4805 to the bumper using the four 12mm x 35m...

Page 32: ...mm push pin in the SAFETY PIN MUST BE FITTED hole on each side see figure below SAFETY PIN MUST BE FITTED HOLE GEO T4805 RIGGING PLATES IN COMPRESSION MODE IMPORTANT The push pins for SAFETY PIN MUST BE FITTED holes must always be inserted first Insert two additional 12mm x 30mm push pins in the front holes see figure below Lift the bumper and two first GEO T4805 to a height that allows convenient...

Page 33: ...the Checklist procedure described later in this manual 3 5 5 Last GEO T4805 to first GEO T2815 IMPORTANT Unlike GEO T 4805 GEO T2815 does not have the 0 safety position Compression Mode only applies to GEO T4805 GEO T2815 s must always be installed in Tension Mode Follow the instructions given in section 3 3 4 for fitting GEO T2815 cabinets in tension mode Check that all push pins are locked and t...

Page 34: ...hat as the LEVA1500 chain gets shorter the cabinets in the array close together to the angles set by the linking bar adjustments When all of the cabinets are closed together required force to rotate LEVA1500 lever becomes much stronger This is the indication that the angles have been correctly set IMPORTANT DO NOT attempt to force on LEVA1500 lever once you feel it resisting strongly to rotation y...

Page 35: ...loading out Taking the system down is just a case of doing the reverse procedure to flying the array However there are some important factors to consider Lower the array until the bottom cabinet is just off the floor and the bumper is back to horizontal Rotate the LEVA1500 lever counterclockwise until there is no tension on the GEO T kelping chain and no compression on the system Disconnect the LE...

Page 36: ...ear kelping beams and pin them into the closed position for transit 3 6 Testing and Maintenance of the system General Geo is a precision piece of equipment and requires regular attention to maintenance in order to give long and reliable service NEXO recommends regular testing of loudspeaker rigging components preferably using a suitable test rig coupled with a visual inspection Fasteners there are...

Page 37: ...alising acoustical response NEXO loudspeakers are acoustically designed for maximum efficiency over their operating bandwidth The NX242 provides the correction required to obtain a flat system response Active rather than passive attenuation allows the lowering of amplifier voltages for a given output SPL and therefore increases the maximum SPL achievable with the same amplifier Active equalisation...

Page 38: ...duration of the temperature limiter and make it sound more natural while the efficiency of protection is fully preserved and protection thresholds are kept as high as possible Physiologic Dynamic Control The Physiologic Dynamic Control is intended to avoid unwanted effects produced by long attack time constants By anticipating the operation of the temperature limiter it prevents a high level audio...

Page 39: ...sducers Output 2 drives the front firing LF MF 8 inch long excursion neodymium cone transducers Output 3 drives the HF 3 inch voice coil 1 4 inch exit neodymium compression driver Output 4 is not used Setups Please refer to the latest version of the NX242 user manual and firmware www NEXO sa com 4 3 2 GEO T2815 Hardware configuration Input can be selected in the MENU 3 2 L R or L R Output 1 is not...

Page 40: ...udible distortion Please note that this peak limiter is not set to act as a compressor on the signal It is intended to minimize the clipping of the amplifier by operating slightly after the amplifier s clipping point One way to properly adjust this parameter is to set amplifier power at maximum 5000W and decrease the value until the amplifier and TDcontroller clip at the same time 4 4 3 Amplifier ...

Page 41: ...Always use balanced connectors with the shield connected to pin 1 on both sides For more wiring recommendations please refer to the application note in the NX242 manual update 4 5 Delays System alignment 4 5 1 Description The NX242 s factory delay presets are optimised to provide the best possible crossover between the GEO T and CD18 systems The reference point for this adjustment is the front of ...

Page 42: ... up to the user to adjust the delay on the NX242 to match the physical path difference of the different systems It is thus possible to get a well adjusted system even without measuring instruments If you choose to drive the Sub from the AUX you feed the NX242 with two signals coming from different sources If those two sources MAIN output AUX send are not exactly in phase you are introducing a dela...

Page 43: ...iciency i e for the same SPL you would be obliged to drive the system harder activating the displacement temperature protection at lower output levels Both sound quality and reliability will decrease as the system is stressed In certain situations you will even need more speakers to do the same job 4 6 4 Precautions Checks Before using the AUX send of your desk ensure that the outputs are in phase...

Page 44: ...B 1350 Watts 0 ms 0 dB 0 dB 5 bars LF rear 32 dB 0 dB 2600 Watts 0 ms 0 dB 0 dB 5 bars MF LF front 32 dB 0 dB 2600 Watts 0 ms 0 dB 0 dB 5 bars CD18 Sub 26 dB 0 dB 2000 Watts 0 ms 0 dB 0 dB 5 bars 5 2 Are the amplifiers properly configured IMPORTANT NOTE FOR BRIDGE MONO MODE OPERATING AMPLIFIERS Bridged mono operating mode adds 6 dB voltage gain Phase relation from amplifier input to output 1 and 2...

Page 45: ...ve from the top to the bottom of the cluster without hearing any change in the tonal balance Verify that the angle settings are the same on both sides of each module Raise the bumper attach the next 6 modules and repeat the above checks Make sure that these 6 modules sum properly with the modules above them When all the modules are flown check that the aiming angles are the same left and right Ver...

Page 46: ...nt 32 Ohm LF rear 32 Ohm Recommended amplifiers HF 2700 Watts into 3 Ohm 6 cabinets parallel per amp channel MF LF front 5200 Watts into 6 Ohm 6 cabinets parallel per bridged mono amp LF rear section 5200 Watts into 6 Ohm 6 cabinets parallel per bridged mono amp SYSTEM OPERATION Electronic controller The NX242 Digital TDcontroller presets are precisely matched to the GEO T Series cabinets and incl...

Page 47: ...nd 1 3 kHz Low frequency directional control shall be achieved with DSP algorithms Electrical connections shall be made via one 6 pole AMPHENOL EP6 socket and one 6 pole AMPHENOL EP6 plug The system shall have a tuned ported 5 trapezoidal enclosure constructed of 18 ply Baltic birch midsection and aluminium rear driver compartment finished in structured black coating and having exterior dimensions...

Page 48: ...m Recommended amplifiers HF 2700 Watts into 3 Ohm 6 cabinets parallel per amp channel MF LF 5200 Watts into 6 Ohm 6 cabinets parallel per bridged mono amp SYSTEM OPERATION Electronic controller The NX242 Digital TDcontroller presets are precisely matched to the GEO T Series cabinets and include sophisticated protection systems as well as advanced cardioid directivity DSP algorithms Using GEO T Ser...

Page 49: ...on dependent when arrayed with a frequency response of 85 Hz to 19 kHz 3 dB 77 Hz to 20 kHz 6 dB The system shall have an active crossover with DSP algorithms and a crossover point of 1 3 kHz Electrical connections shall be made via one 6 pole AMPHENOL EP6 socket and one 6 pole AMPHENOL EP6 plug The system shall have a 15 trapezoidal enclosure constructed of 18 ply Baltic birch midsection and alum...

Page 50: ...t 1000 to 2000 Watts into 8 Ohm per channel SYSTEM OPERATION Electronic Controller The NX242 Digital TDcontroller presets are precisely matched to the CD18 and include sophisticated protection systems Using the CD18 subbass without a properly connected NX242 Digital TDcontroller will result in poor sound quality and can damage components Speaker Cables The front loudspeaker of the CD18 is wired 2 ...

Page 51: ...ctional control of sub bass with a crossover point of 80 Hz Electrical connections shall be made via two 4 pole NL4MP SPEAKON connectors The system shall have a tuned dual ported rectangular enclosure constructed of 18 ply Baltic birch with low speed port geometry finished in structured black coating or dark grey carpeting and having exterior dimensions no greater than 750mm H x 1200mm W x 750mm D...

Page 52: ... GEO T Kelping Beam WEIGHT 53 KG 116 8 LBS 310 mm 310 mm 12 20 12 20 911 mm 911 mm 35 87 35 87 839 mm 839 mm 33 03 33 03 658 mm 658 mm 25 91 25 91 1850 mm 1850 mm 72 83 72 83 418 mm 418 mm 16 46 16 46 850 mm 850 mm 33 46 33 46 1247 mm 1247 mm 49 09 49 09 1075 mm 1075 mm 42 32 42 32 405 mm 405 mm 15 94 15 94 ...

Page 53: ...TECHNICAL SPECIFICATIONS Page 53 63 6 4 3 GEO T Bottom Bumper WEIGHT 9 5 KG 20 9 LBS 836 5 mm 836 5 mm 32 93 32 93 35 mm 35 mm 1 38 1 38 474 mm 18 66 836 5 mm 32 93 35 mm 1 38 474 mm 474 mm 18 66 18 66 ...

Page 54: ...bit converters 8 Pole Removable Strip Terminal Audio Outputs 4 Audio Outputs 24 bit converters Electronically balanced 50 Ohm 4 XLR 3M connectors Processing 24 bit data with 48 bit accumulator 100MIPS Optional Expansion Board 300MIPS Front Panel Menu A and Menu B buttons 16 characters by 2 lines display Select Wheel Enter button IN Clip DSP Clip red LED s Speaker Protection yellow LED for each cha...

Page 55: ...emp ChassisTemp LF TEMPERATURE 2 Disp Command Voice Coil Temp ChassisTemp LF TEMPERATURE 0 INPUT VU METER 0 INPUT VU METER AD EQ AD DAC MUTE EQ EQ AD DAC MUTE EQ EQ AD SHELVING DAC MUTE EQ EQ AD DAC MUTE EQ EQ SHELVING AD EQ Command HF TEMPERATURE 4 Command HF TEMPERATURE 3 Command HF TEMPERATURE 2 Command HF TEMPERATURE 1 Gain8 VCA 1 Gain2 1 Gain18 VCA 1 Gain13 VCA VCA FALLBACK AMP VOLTAGE Signal...

Page 56: ...Page 56 63 CONNECTION DIAGRAMS 7 CONNECTION DIAGRAMS 7 1 GEO T4805 T2815 to amplifiers and NX242 ...

Page 57: ...CONNECTION DIAGRAMS Page 57 63 7 2 CD18 to amplifiers and NX242 ...

Page 58: ...OT 12 30 GEO T2815 GEO 2x 8 Neodymium 15 Module 4x BLGEOT 12 30 CD18 C CD18 2x 18 Carpeted Cardioid CD18 P CD18 2x 18 Painted Cardioid ANX 242 Digital TDcontroller for PS Alpha and Geo series 8 2 Accessories List MODEL DRAWING DESCRIPTION GEOT BUMPER Main Geo T Bumper 4x BLGEOT 12 35 included GEOT BCCH Compression Mode Kelping Chain GEOT BTBUMPER Geo T Bottom Bumper GEOT KELPBEAM Geo T Kelping Bea...

Page 59: ...INCO Geo T Waterproof Back Cover up to 6 cabinets GEOT BPRAINCO Geo T Bumper Waterproof Back Cover CD18 WB CD 18 WheelBoard BLGEOT12 30 GEO T 12mm x 30mm Quick Release Pin BLGEOT12 35 GEO T Bumper 12mm x 35mm Quick Release Pin GEOT CABLE 1m Linking Cable For Geo T4805 T2815 GEOT 613F EP6 Female Connector GEOT 612M AP6 Male Connector ...

Page 60: ...ult To convert degrees to radians use the formula Angle in radians 3 142 x Angle in degrees 180 Computer Laptop or Desktop PC running Windows 95 98 2000 or XP with the current version of NEXO GeoSoft installed It is not possible to configure a Geo tangent array properly without using GeoSoft Note that when GeoSoft designs are prepared prior to arrival at the venue it is often necessary to modify o...

Page 61: ...USER NOTES Page 61 63 10 USER NOTES ...

Page 62: ...France Nexo S A 154 allée des Erables ZAC des PARIS NORD II B P 50107 F 95950 Roissy CDG Cedex Tel 33 1 48 63 19 14 Fax 33 1 48 63 24 61 E mail info nexo fr www nexo sa com ...

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