If you mean raising or lowering the gain (volume) on the sub, no that will not help with dips in your frequency response. Also, no you do not have to re-run Audyssey if you adjust gain on the sub amp, however it is recommended to raise/lower the subwoofer level in the AVR since it is a more exact control.
No its not the sub gain. Its a seperate control knob for 25hz level.. i cant remember exactly what its suppose to do at this moment.. looked up —-if you have weak or boomy bass it helps with these anomolies supposedly..
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