I record with a Boss BR600 by mic'ing my amps with an SM57, but haven't been happy with the recorded sound of overdriven guitars. Would adding an external preamp like the ART Studio MP help warm up the recordings? Has anyone tried this with a Boss recorder? I have good gear: my amp is a '64 Princeton Reverb and I get my overdriven tone at basement volumes using a Fulltone OCD. I just can't capture my live sound on the recordings. I've tried different mic placements. I'm very happy with my clean sound, I just can't capture the overdriven tone properly.