is there a gain adjustment on the amp (2003.5 M3 coupe w/ HK)

[LM330iSP]

I want to try to get rid of the constant hiss I have in the speakers even when the stereo is off. I think the problem is that the amp gain is way too high (wich would also explain why the nav voice and command voice (from the ULF BT module) arfe too loud).

Does anyone know how I could lower the gain?

Thanks.

[lockuplever]

I have that exact amp in front of me, and there is no external adjustment. Maybe something inside to adjust the gain. If I get time later I'll pull off one of the covers and see what it looks like inside.

Steve

[LM330iSP]

thanks, could you take a pic?