yeah im draining 60 i was thinking about aaddinf another rf amp that would drain an additional 40 so 100 amps total. on a stock 140 alternator in the desert heat....... doesn't sounf to good to me so im jus gonna stick with my 4 channels to power my mb quart compnents and 2 kicker comp vr's. the rear boston accoustics co-axials are powerd through my alpine head unit.