For sale is a like new MA Audio Hk 4000d. No scratches in the chrome. Used only for a couple months. 450 + shipping
If you want more than 75 watts to the subs, then no you can't. This is known in the competition world as a "cheater" amp.that amp is stable @ 2 ohms, but if you have dual 2 ohms you could wire the amp to a 4 ohm load