hey, my name is Ian and I am very new to car audio, so new in fact I actually let a car toys rep talk me into buying 2 Dual amps...if I knew where he lived I'd burn his house down...lol...ok, they're not THAT bad. I am going to step up to a DAT 1000.1 when they drop, not sure what subs I'll go with yet, but I'm learning startin a T-Line in a week or so for 2 JBL GT512s and the 140 (139.9) was on a ghetto hand held meter so who knows what it really is...peace