All, I posted this at DIYMA, and didn't get too may helpful responses, so figured I'd ask the Hive Mind. Back in the '90s, I used to set amp gains by turning the level pot all the way up and then ...

Taking apart a circuit board or module and reconstructing its complete schematic is a valuable skill. We can see how someone designed circuitry to gain ideas that can be applied to our work. And ...

I have a Behringer XENYX 1002 mixer with 2 15" loudspeakers plugged in left and right output respectively. Where would I plug in my subwoofer? I don't see anymore output holes in the mixer? Please ...