Nexo GEO D - Manual (Page 2)

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GEO Technology is radically new thinking
The GEO R&D Project has, to date, resulted in the following patent applications:
• The GEO Hyperboloid Reflective Wavesource™ differs radically from the megaphone-variant
type horns you know and love (or hate). “Tried and true” methods will produce entirely
unexpected results. HRW technology produces precise and predictable results.
• The Configurable Directivity Flange. A waveguide that allows the operator to alter its behaviour.
An unprecedented NEXO development that is easy to use – once you know how and when.
• The Directivity Phase Device needs no operator input to function, but it is reassuring to know that
the coupling of the midrange of the system is considered as important as the high frequencies…
• GEO’s DSP-driven Cardioid Dipolar Sub-bass devices are a new approach to controlling LF/VLF
acoustic energy.
GEO is not hard to use when you understand how…
The technology behind GEO is revolutionary, but it is grounded in years of practical experience with the
problems of delivering high quality professional sound to large audiences at high SPL levels. The GEO
toolbox includes GEOSoft -a simple yet powerful and highly predictive design tool. The array assembly
system is keyed to the design software and will easily enable you to deploy your design with great
precision. The NX242 Digital TDcontroller provides driver protection and system optimization as well as
DSP-driven cardioid pattern control for the GEO D10 Tangent Array Module and the GEO SUB Cardioid
Dipole Sub-bass.
GEO is a high precision system
The GEO HRW™ controls acoustic energy more precisely than other multiple element waveguides. It
also makes GEO less forgiving of mistakes. Whilst conventional horns never combine into a coherent
array, they may deliver acceptable results even if the design and deployment of the system is less than
optimal. This is not the case with GEO where careless installation produces catastrophic results.
A GEO Tangent Array is 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 the user needs 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
conventional horns to deliver [more or less] ‘equal power to equal angles’. Curved vertical arrays are
designed to deliver [more or less] equal power to equal areas’. When arrays use conventional horns,
the lack of precision, overlap and interference masks errors in array design and aiming. 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° precision.
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 horn design. “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 time to learn how to get great results with GEO Technology. It is 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. A comprehensive understanding of GEO theory, tangent arrays,
and specific features of the GEO D Series will help you to operate your system at its full potential.