I don't test brushless systems for long, just to make sure everything's hooked up ok before I install it. Also makes it easier to program the ESC I think. I don't need to fiddle with batteries, just plug it in.
One of the downsides of listening to metal: subwoofers sound really crappy unless they're perfectly tuned. I had a pair of Logic Soundlab
ZDX 12's with one of their
LSX-2802 amps. The sound was crystal clear, and loud, except the music was like continuous thunder! Too much double-bass drumming I guess... Also if you go to their site, my ZDX subs had the same back structure as the EXL subs, and they could handle 2000W max! IDK why the changed them...