very nice. when i had my box at 2.75@ 37 off 1000 watts per 12'' R it wanged like hell. now all you need is another type R and 2 bxi2006d's per sub 2 @ 1 ohm. thats what i am running right now and they like the power. my current box is 4 cubes @ 34. more of a sql box but its still **** loud.