We hooked up a memphis 2.5kw and it is a SICK amp. I was more impressed with that amp than the 15'' M3MOJO it was slamming on! I can't wait untill we get a 4kw to mess with //content.invisioncic.com/y282845/emoticons/yumyum.gif.0556df42231b304b9c995aefd13928a8.gifneed this sold yesterday, i want to buy one of them memphis 4kw!