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Nexo Launches New Tangent-Array System
A long-anticipated addition to the company's successful 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/sub bass cabinet, which arrays from the same Over/Under bumper as GEO D, and offers unrivalled pattern-control from new, proprietary NX242 TDcontroller 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 remarkable GEO SUB, at 140dB-143dB peak, can fly 16 units deep per bumper.
Positioned as the ultimate upgrade, the GEO D/GEO SUB package significantly broadens the potential user base for advanced Nexo's tangent-array technology. Like all Nexo products, GEO D and GEO SUB are subject to advanced EtherSound network integration and control.
Designed by Nexo's in-house team of Eric Vincenot, Francois Deffarges and Frank Gillardeaux (the GEO SUB), the GEO D and GEO SUB are fully compliant with the rest of Nexo's GEO Series technology. GEO D allows an unprecedented 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.
Most GEO D applications will require one of two available sub-bass options. The GEO SUB bass/sub-bass offers cardioid LF (29Hz to 600Hz) while Nexo's CD18 SubBass is offered for sub bass-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.
Nexo's 3-way GEO D vertical array module contains two 8in side-firing active transducers, positioned on the left and right side of the cabinet, with a single 12in ahead of them at the front of the box, coupled to a proprietary Directivity Phase Device (DPD).
While GEO D's vertical MF/HF pattern control is array-dependent, the horizontal MF/HF coverage is configurable tol 80° or 120°, and the module achieves exceptional MF-LF output (105dB SPL nominal sensitivity-1W /1m). NEXO's digital, EtherSound-enabled NX242 TDcontroller integrates hi-performance MF/HF response with cardioid LF coverage via the two 8in loudspeakers.
A 16? driver/3in voice coil/1.4in throat HF assembly provides unrivalled coherence as mounted to the patented, third-generation, 5° GEO Hyperboloid Reflective Wavesource (HRW).
An important development in the GEO Series is the new compression-mode rigging system developed for GEO D, with logarithmic angles from 0.2° to 10°. The versatile (Over/Under) GEODBUMPER allows up to 24 GEO D’s to be flown together, and also offers a stage-stackable option, giving users maximum rigging flexibility in venues large and small, old and new. This elegant, integral flying system optimises venue-specific array design via precise, logarithmic inter-cabinet angle adjustments as configured by GEOSoft2 array software.
Conventional, omni-directional subwoofers produce nearly equal FOH and on-stage LF levels, overwhelming stage monitor mixes and over-stimulate the reverberant field. Indoors, a 'power alley' produces excessive centre aisle bass and lightweight sidewall LF. Midbass frequencies (80-400Hz) experience similar omni-directional interference.
The unconventional GEO SUB is an advanced cardioid bass and sub bass module, displaying exceptional forward gain across the LF- VLF frequency range (29Hz to 600Hz) and eliminates most common omni-directional LF problems. A high-efficiency, front-loaded 18in driver delivers140-143dB peak SPL, while twin 12in 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 sub bass. Special aerodynamically-profiled vents reduce vent noise by 20dB, and improve linearity at high SPL’s.
13th April 2006
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