Does anyone know a good site that will teach me about audio/sound systems. I would really like to understand this stuff. I know a bit, but as far as being safe and knowing percisely what to do. EX. I have this amp that I started another thread with. I think it has 4 rca's(it looks like a front L & R and a rear L & R) my question is will I be able to just hook up any old H/U up to it, or will I need to get an adapter or something because I always thought H/U's only had 2 rca's. Maybe Im confused. Thanks in advance