NEXO GEO S830 Vertical/Horizontal Array Module
GEO S8 System Overview
Ultra-compact. Highly efficient. Consistently coherent.The ultimate listening experience for the smaller audience.
Experienced audio professionals have developed, tested and verified ‘rules of thumb’ for live sound reinforcement. The patent-protected innovations that are the core of NEXO's GEO Technology break those rules again and again.
Minimal arrays of five GEO S805 Vertical Tangent Array Modules and one S830 Horizontal/Vertical Tangent Array Module have proven their ability to tame difficult acoustic environments and bring a new sense of detail and intimacy to audiences of up to 2000.
Deeper arrays of up to 24x S Series Tangent Array Modules have been used in arenas and outdoor events for tens of thousands. In both types of application, the consistent SPL, stunning coherency and surprising efficiency of the GEO S Series has challenged audio professionals to rethink their assumptions and to explore new possibilities.
The compact GEO S830 is a high-output array module intended for horizontal tangent arrays or as a downfill element in curved (tangent) vertical arrays to establish consistent SPL in all coverage areas. The HRW™ allows the 30° S830 and 5° S805 to be coherently arrayed together.
GEO S Series loudspeakers ship with 120° dispersion (in the non-coupling plane) Configurable Directivity Devices (CDD), but are field-changeable to 80° CDDs. To maximize downfill coverage, CDFs are used on GEO S830s for the bottom two rows of curved vertical arrays.
Key Features
- S830 can be deployed in horizontal or vertical tangent arrays.
- High power, long excursion neodymium 8” woofer delivers full range output from compact enclosures.
- Light weight (13kg per module including precision array assembly system) construction allows GEO tangent arrays to be hung almost anywhere.
- When vertically arrayed, multiple Hyperboloid Reflective Wavesources project tangent wavefronts from a common virtual source for coherent output.
- Configurable Directivity Device allows dispersion in the non-coupling plane to be changed from 80° to 120° through bolt-on flanges that alter the flare of the diffraction slot’s exit.
- Directivity Phase Device combines enhanced line source coupling in vertical arrays with extended low frequency response.
- NS-1 array design software predicts vertical tangent array performance for a wide range of venues.
NEXO Geo systems incorporate a number of patented technologies to achieve exceptional accuracy, consistent frequency and SPL coverage throughout the audience, and close correlation between mathematical predictions and real-world results.
To achieve coherency in a line array, multiple cabinets must behave as if they share a single sound source. Geo systems use NEXO’s groundbreaking Hyperboloid Reflective Wavesource (HRW™) technology to ensure that wavesources couple optimally without destructive interference.
The HRW controls acoustic energy with a precision–engineered hyperboloid acoustic mirror, creating a virtual wavesource located outside the cabinet.
Because the path lengths from the virtual and real sources to the horn mouths are identical, wavefronts are perfectly in phase at their coupling points – regardless of where the real sources are located in relation to the coupling point.
In permanent installations, Geo D and Geo S systems ship with Configurable Directivity Device Flanges, providing system designers with an unprecedented degree of control over wavesource behaviour. CDD flanges can be easily introduced into the waveguides – for instance on the bottom two cabinets of curved vertical arrays to fill in coverage gaps in the front rows, or in all cabinets where 120 degrees of horizontal coverage is preferred to 80 degrees. In horizontal arrays, CDD flanges can be used to widen vertical coverage from 80 degrees to 120 degrees.
In line arrays, the physical diameter of cone drivers would appear to make it impossible to achieve interference-free, close coupling of wavesources at the frequencies necessary to crossover with HF drivers. NEXO’s revolutionary Directivity Phase Device causes an 8 inch driver, for instance, to behave as twin 4 inch drivers, with two acoustical centres spaced 5 inches apart, cleverly extending the upper frequency limit for line source coupling between adjacent woofers.
Geo rigging systems deliver control over angular splay to an increment of 0.01 degree, making it possible to configure line arrays of exceptional accuracy and coherence.
The Sub-Bass Solution
NEXO looks towards microphone design to achieve directional control of sub-bass frequencies, applying the interference between two sources of identical amplitude to radiate a cardioid polar pattern with off-axis control. The NX TDcontroller platform maximises subbass pattern control for the CD12 cabinet.
