Ok I have an old school ADS 280 CMX Power Plate amp, that has no ***** or controls on it, but when you take off the plate, there is two *****, or screw heads, that you can turn, that arent labelled anything. Does anyone know what these are? Im assuming one is the gain?

Then there is a high pass filter thing that has two sets of multiple little switches that you can change. Does anyone have the manual on setting these?

And then there is low pass filter ****/screw.

I have no manual for this amp, so if anyone has any info that would help me, or best case senerio a pdf manual for this amp? that would be very helpful.

Or does anyone know how to contact A/D/S and maybe they could send me a pdf? Even though its no longer the same owners of the company and whatnot, thinking maybe they could help anyways.

Thanks