I have a 08 Kicker ZX650.4 that I am wanting to trade for an amp that is smaller in size. I love the power it puts out, but it's too big to mount next to my existing sub amp. I have been running it a couple of weeks and it is rock solid. I bought it new. It measures roughly 20inches long. I need something shorter. Preferably 4x100 or greater. PM me with what you got. Thanks!