Hey guys, I have been thinking, and I am going to build some solar speakers. Now this is not my first time building solar speakers, so I know how to wire everything. The only difference is this time I want to want to build my own amplifier. I want to build a 2 channel 60-80watt amplifier. I haven't found any schematics online that are similar to those, and I would want to wire in an off switch, a volume knob, a bass knob, and a treble knob. Also, I would want to wire in an 3.5MM jack at the minimum. If anybody could help me with some schematics and a list of parts, that would be wonderful. Also, if anyone knows how, is it possible to wire a USB port onto here that will not only charge the device, but would also play music from the device to the amp. Any help would be greatly appreciated.