I remember a friend bringing over a 4-track tape recorder. We put it on top of his guitar amp. Then we put it on top of my bass amp. And the end result sounded like utter barf.
I would need a decent recording mic I could run into the thing. Also, how do you make for passable acoustics in... say... the living room of a one-bedroom apartment? Or in a bathroom or closet or something? One scheme I've had is to put the amp/cab in a cardboard box that's lined with blankets or towels but then I don't know if I'd be able to hear myself playing good enough.
