Nexo GEO D series, User Manual

Page: 73 / 93

GEO D – GEO SUB A
RRAY
S
YSTEM
C
HECK
L
IST
Page 73/93
8 GEO D – GEO SUB A
RRAY
S
YSTEM
C
HECK
L
IST
It is essential to execute all these check steps prior to perform a sound check on the “front end” to the
system. Following this checklist step by step will prevent many troubles and will save time in the end.
8.1 Are the NX242 Digital TDcontrollers properly configured?
IMPORTANT
If you must change any of the parameters listed above, make sure that you use the same
values on all NX242’s.
8.1.1 NX242 settings
Output Assignment
NX Setup / NXChannel 1 2 3 4
GEO SUB – GEO D Passive Mono GEO SUB Rear GEO SUB Front GEO D Rear GEO D Front
GEO SUB - Stereo GEO SUB Rear GEO SUB Front GEO SUB Rear GEO SUB Front
GEO D Passive Stereo GEO D Rear GEO D Front GEO D Rear GEO D Front
GEO D Active GEO D Rear LF GEO D Front LF/MF GEO D Front HF -
Output parameters
Output
Label
Amp
Gain
(1)
Amp
Power
(1)
Global
Gain
(2)
Global
Delay
(2)
Sense
Gain
Speaker
Qty
(3)
Headrom
(4)
All channels (GEO D and GEO SUB) 26 dB 1600 W/8 Ω 0 dB 0 ms 0 dB 5 bars
(1) values for recommended amplifier gain and power : should be set in agreement with selected
amplifiers specifications
(2) Local gain and delay values are inter-locked channel 1&2 and 3&4
(3) Should be in agreement with implemented cluster; acts on a shelving filter designed to compensate
for LF coupling (6 GEOD is 0dB gain on shelving filter, less than 6 is positive gain, more than 6 is
negative gain)
(4) Disabled when using digital inputs.
8.2 Are the amplifiers properly configured?
Freq. Band Mode Gain Switch Limiter High Pass
All channels (GEO D and GEO SUB)
Stereo 26 dB None None
8.3 Are the amps and the NX properly connected?
Check that the sense lines on the NX242’s are properly connected by applying a signal to the
corresponding output and verify that the correct Sense LED illuminates.
8.4 Are the speakers properly connected and angled ?
•
Attach the first serie of modules to the bumper.
•
Before flying, verify that all channels of all modules are functioning properly.
•
Make sure that each GEO D10 / GEO SUB is producing the proper front/rear summation: when
listening from behind the array, switch the front drivers in and out. You should hear a reduction in
the LF range when the both front and rear drivers are on as compared to when the rear drivers