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Nexo launches Geo D array system at prolight+sound

Geo Sub construction
Nexo unveiled its new Geo D tangent-array sound reinforcement system at the prolight+sound show 2006 in Frankfurt. A long-anticipated addition to the company's Geo S and Geo T tangent-array designs, Geo D features Nexo's patented, third-generation Hyperbolic Wavesource. Equally innovative is the cardioid Geo Sub bass/SubBass cabinet, which arrays from the same over/under bumper as Geo D, and offers pattern-control from new, proprietary NX242 TD controller digital filter sets.
Five years experience with Geo series flying and stage-stacking systems have yielded the most rigging-friendly Nexo sound reinforcement system to date. Equally at home on or above the stage, using a single, elegant hardware system, Geo D can be deployed in minimum arrays of four units per side, while the Geo Sub, at 140-143dB peak, can fly 16 units deep, per bumper.
Designed by Nexo's in-house team of Eric Vincenot, Francois Deffarges and Frank Gillardeaux, the Geo D and Geo Sub are fully compliant with the rest of Nexo's Geo Series technology. Geo D allows an entry point to Geo Technology, with a minimum system configuration of only four cabinets per side. For a relatively low investment, a 16-box Geo D (mid-size concert) inventory can be divided into two separate systems, usually with at least one bass/subbass cabinet per side, to handle two smaller events simultaneously.
The Geo Sub bass/sub-bass offers cardioid LF (29Hz to 600Hz) while the CD18 SubBass is offered for subbass-only reinforcement. Either LF option completes an affordable vertical array solution for fixed and mobile applications in all sizes of venues, from arena to theatre, to ballroom.
The 3-way Geo D vertical array module contains two 8" side-firing active transducers, positioned on the left and right side of the cabinet, with a single 12" ahead of them at the front of the box, coupled to a Directivity Phase Device (DPD). While Geo D's vertical MF/HF pattern control is array-dependent, the horizontal MF/HF coverage is configurable at 80° or 120°, and the module achieves an MF-LF output of 105dB SPL (nominal sensitivity 1W @ 1m). The EtherSound-enabled NX242 TD controller integrates hi-performance MF/HF response with cardioid LF coverage via the two 8" loudspeakers. A 16 Ohms driver/3" voice coil/1.4" throat HF assembly provides coherence as mounted to the third-generation, 5° GEO Hyperboloid Reflective Wavesource (HRW).
The new compression-mode rigging system with logarithmic angles from 0.2° to 10° allows up to 24 Geo Ds to be flown together, and also offers a stage-stackable option, giving users maximum rigging flexibility.
Whereas conventional, omni-directional subwoofers produce nearly equal FOH and on-stage LF levels, the new Geo Sub is a cardioid bass and subbass module, displaying forward gain across the LF- VLF frequency range (29Hz to 600Hz) and eliminating most common omni-directional LF problems. A front-loaded 18" driver delivers140-143dB Peak SPL, while twin 12" side-firing transducers help create cardioid LF pattern control via precise rear pattern cancellation. NX242 TDcontrollers, fitted with the required NXtension Expander Boards, employ advanced digital filter sets with new, proprietary algorithms, to optimise phase and extend Geo Sub's cardioid LF control from midbass to subbass. Special aerodynamic profiled vents reduce Vent Noise by 20dB, and improve linearity at high SPLs.
The versatile (Over/Under) GeoDBumper allows as many as 16 Geo Subs to be flown together in various combinations with Geo D, or independently as part of a Geo S or Geo T system. When stage-stacked, Geo D's crossover mode deploys from 75Hz to 150Hz, while LF response extends to 600Hz when Geo Subs are flown with any Geo system.
Two amplifier channels are required for directional operation, each rated at 1000 to 2000W into 8 Ohms per channel. The NX242 Digital TDcontroller presets are precisely matched to the Geo Sub and include sophisticated protection systems.
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