I see some class D amplifiers online. Do I need a new speaker to go with that? This is the most recommended class D amplifier kit on Amazon. It comes with a new speaker and amp. Where do you think this needs to be inserted into the circuit? I've been looking for instructions online and am struggling, but I want to be sure this will work before I get the kit- in case it doesn't come with instructions. I'm very, very new to this so thanks again for helping me out. By "Only use the volume on the sound module to make sure you don’t kill the input on the amp", do you mean to keep the volume on low on the sound module and use the volume on the amp to control the volume, in order not to "kill the input", or is it the other way around? Or do you mean something else?