Nexo GEO S8 - Manual (Page 16)

P.16 USING THE CONFIGURABLE DIRECTIVITY DEVICE
U SING THE C ONFIGURABLE D IRECTIVITY D EVICE
The GEO Wavesource controls dispersion of acoustic energy using an hyperboloid acoustical reflector in the
“coupling plane” (the vertical plane of a curved vertical tangent array) and a diffraction slot in the “non-coupling
plane” (the horizontal plane of a curved vertical tangent array). The patent-pending Configurable Directivity
Device consists of bolt-on flanges that alter the diffraction slot’s exit flare rate. The flanges look like this:
In the graph below, the red curve shows the dispersion in the non-coupling plane with the flanges installed:
the narrower blue curve shows the dispersion without the flanges.
Installing & removing GEO’s Configurable Directivity flanges
GEO S805 are shipped in the 80° dispersion (without the flanges installed). GEO S830 Series loudspeakers
are shipped with the flanges installed (120° dispersion in the non-coupling plane). To remove the flanges for
narrower 80° dispersion in the non-coupling plane, remove the front grill and the four TORX (head 25) screws
in each side of the GEO Wavesource. Store these screws with the flanges. To fill in the holes, use the shorter
replacement screws provided with your GEO S8 Series loudspeaker. Do not attempt to screw the longer
flange attachment screws into the waveguide attachment points: this will damage your GEO S8 Series
loudspeaker’s Hyperboloid Reflective Wavesource.
NOTE: A torque of 1N.m maximum shall be applied to the screw. NEVER USE POWER TOOLS TO
INSTALL OR REMOVE CDD FLANGES: THEIR EXCESSIVE TORQUE CAPABILITY CAN EASILY
DAMAGE THE GEO WAVESOURCE.
M5x25
M5x12
1k 10k
−180°
−120°
−60°
0°
60°
120°
180°
Freq [Hz]
Angle [°]
COVERAGE ANGLE (Degree)
GEO Hyperboloid Reflective Wavesource
with Configurable Directivity Device flanges Non-coupling plane dispersion vs. frequency, with
(120° black) and without (80° grey) Configurable
Directivity flanges installed