Polycom SoundStructure C16 Design Manual page 221

2 Set the analog output gain on the amplifier output channel to be either +4, 0, or -10 depending on
the nominal signal level required by the audio amplifier. Amplifiers with RCA inputs require a -10dB
setting, most system integration professional amplifiers require the 0dB setting, and some amplifiers
require the +4dB setting.
3 Turn down the audio amplifier to the lowest possible volume setting (alternatively the highest
amount of attenuation). The noise generator is loud in the next step and it is best to reduce the gain
on the amplifier prior to sending noise into the room.
Polycom, Inc. 221