Nexo GEO S8 - Manual (Page 2)

P.2 PLEASE READ CAREFULLY BEFORE PROCEEDING
GEO is new technology
The 3 year GEO R&D Project has generated the following patent applications:
• The GEO Hyperboloid Reflective Wavesource™ works on a different principle from the
coercive megaphone-variant horns you know and love/hate. If you apply “tried and true”
methods to this entirely different species of waveguide, the results are likely to be very
different from what you expect.
• The Configurable Directivity Device. A waveguide that allows the operator to alter its
behaviour in the field? Yes. Another unprecedented development that’s easy to use – once
you know how and when.
• The Directivity Phase Device needs no operator input to work properly, but it’s always nice
to know…
GEO is not hard to use when you understand how…
The R&D behind GEO is revolutionary, but it is grounded in years of practical experience with the problems of
delivering high quality sound to large audiences at professional SPL levels. GEO includes a simple yet
powerful and highly predictive design tool – NS-1. The array assembly system is keyed to the design software
and will easily enable you to deploy your design with precision to 0.01°. The NX242 includes presets that have
been tested and measured by NEXO R&D. They cover virtually any GEO tangent array configuration,
horizontal or vertical, with or without the CD12 HyperCardioid Subbass.
GEO is a high precision system
The GEO Wavesource controls acoustic energy more precisely than previous generations of coercive
waveguides based on the megaphone. This precision makes the GEO system more capable than previous
array elements. It also makes GEO less forgiving of mistakes in design and deployment. While megaphone-
variant horns never combine into a coherent array, they can deliver acceptable results even if the design and
deployment of the system is less than optimal. This is not the case with GEO.
GEO is a tangent array, not a “line array”
GEO Technology is equally effective in designing and deploying tangent horizontal arrays or curved vertical
arrays. For best results in a specific application you need to know how multi-speaker arrays interact with
audience geometry, along with the benefits and drawbacks of curved vertical arrays and horizontal arrays.
Curved vertical tangent arrays require different design techniques
For the past 20 years, sound reinforcement professionals have worked with horizontal arrays that use
megaphone-variant horns to deliver “[more or less] equal power to equal angles.” Curved vertical arrays are
designed to deliver “equal power to equal areas.” When conventional coercive horns are used in the array
elements, their lack of precision masks errors in the design of the array and in the aiming of the individual
cabinets. The highly precise GEO wavesource responds accurately, consistently and predictably to the design
and deployment of a curved vertical tangent array. This is why the GEO rigging system is designed to control
angular splay to 0.01° accuracy.
GEO curved vertical tangent arrays require different operational techniques
Over the years, system designers and operators have developed a number of signal processing techniques to
disguise and partly overcome the limitations of coercive megaphone waveguides. “Frequency shading,”
“amplitude shading,” “system tuning,” all of these are tools of the advanced sound system operator. NONE OF
THESE TECHNIQUES ARE APPLICABLE TO GEO TANGENT ARRAYS. Instead of enhancing the array’s
performance they will severely degrade it.
Take a little time to learn how to get great results with GEO Technology. It’s an investment that will pay off in
more satisfied clients, more efficient operating procedures and more recognition for your skill as a sound
system designer and operator