Originally Posted By: XenonMan
In reading the manual on page 36 it seems that the 975 has some sort of limiter at "0" db where even if you increase the trim the max volume decreases the same amount.
There is no limiter. The volume and trim controls are performed in the same volume control chip (as is the case with most AV processors). The maximum output happens at 0 dB. If a trim control asks for 6 dB gain, it takes 6 dB away from the volume range on all the channels so the total in the +6 channel remains 0 dB thru the volume IC.