ok lol here we go the channel is how many subs can be hooked up to it(but u can hook up 4 speakers to a 2 channle amp)and the ohms law is very very very important becuz the lower the ohm the more power u can get BUT the lower the ohm setting the more stress u put on ur woofers rms is the recomended setting witch means what the power seting that is safest to use( i run my subs 100w over the rms)the rms is most of the time half of the max ok now a ported box will be louder better for spl and move more air(witch means more bass)ok and a sealed box would be better for ur sound quality meaning a set of 10in woofers in a sealed box would be a awsome setup for a rocker lol ok the dos and donts lol dont let ur power wire touch anything at all and make sure ur ground is NICE and CLEAN and TIGHT cuz the ground is one of the most important things ok now always make sure none of ur wires a crimped(or shut in a door) ALWAYS duble check ur wire and ALWAYS make sure nuthing is going to hit ur woofers and be sure there n the box good and thats about all i can say without writing a book lol