Once again, I bought the wrong equipment...I have a diamond audio M6 10" Daul 4 ohm VC sub and this amp that does 400X1 at 4 ohms and 200X2 at 2 ohms.....RMS for that sub is 800 watts, but I think it is a great amp that has barely been used, perfect condition with about 2 weeks worth of playtime on it...i built a bigger box (reccomended for the sub) and it just wont push that sub. Looking for $110 SHIPPED! Stewart