I recently bought a used punch p1 12” sub and it came with 2 amps. One is a Rockford fosgate r150x2 that’s 150 watt and the other is a pioneer gm-d8601 which is 1600 watt. The guy that installed used the Rockford and I don’t know why. I tried switching the amps to see if I got more power but it was the exact same as before. Can anyone give me a reason why? And also, I want to have a volume knob to control the amount of bass and don’t know where to start on that. Anything helps.