Welcome to the madness, pics or it didn't happen lol
cutting down the 4 string...to a 3 string?
What sort of amplifier? Like how much power you looking to put out there?
I myself am working on a 200W ( 100W per channel / stereo ) amplifier, currently I can play music off my phone using the AUX port, still need to get the guitar input stage correct ( bought a preamp board kit for this, need to solder it and try it out )
For simple/quick/cheap amplifier I would grab the parts and build a Smokey Amp (which I didn't know about until after I bought the last kit! ), seems more than simple enough and pretty loud considering.
This is a Ruby amp, it's a variation of the Smokey amp. It has a great tone that many say emulates a Fender Champ. Has a Volume and Gain control and you can do a input mod to sound more like a Bassman and adding a Tone control isn't hard to do.The bigger you speaker, the better it will sound. 6" or bigger at 8ohms.