Owner's Manual

Page 84/112 GEO S12 – RS15 / CD18/S2/GEOSUB SYSTEM CHECK LIST
12.4 Are the speakers properly connected and angled ?
• Attach the first series of modules to the bumper.
• Before flying, verify that all channels of all modules are functioning properly.
• Make sure that each RS15 / CD18 / 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 only are on. When listening from the front, you should hear a strong increase in the
LF range when connecting the rear drivers.
• To check that all front elements have the proper amplitude and phase, you should listen to the
upper boxes at a close distance (<1 meter). You should be able to move from the top to the
bottom of the cluster without hearing any change in the tonal balance.
• Verify that the angle settings are the same on both sides of each module.
• Raise the bumper, attach the next series of modules and repeat the above checks.
• Make sure that these series of modules sum properly with the modules above them.
• When all the modules are flown, check that the aiming angles are the same left and right.
• Make sure that multiple GEO S12 and RS15 / S2 / CD18 / GEO SUB are summing properly: 6
dB gain per doubling of quantity.
12.5 Final Pre-Sound Check Check
Play a CD track mono left, and then right: both sides must sound strictly identical. When listening in the
centre between Left and Right GEO S12’s, everything from LF to HF should be located to the “phantom
centre” position. If not, repeat the above check sequence to identify the source of the problem.