You are focusing on the "volume knob". It IS NOT a "volume knob", it is for gain. You will be using the power of the 500 when you match levels like was mentioned several times.

Just like any other pre amp the sub out from the receiver has a lot to do with how much the "gain knob" is turned up. It sends a low level signal to the sub amp were it is amplified, which varies per receiver used. That's why the sub, any sub, has variable gain control.

Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud