Well I've just about gotten my Polk SR124 broken in. I have it in a 1.3^3 sealed box feeding it about 800rms. All I have to say is Wow! so clean. and what a difference it makes when its broken in, each day it sounds better. Output is good too. Overall i'm very pleased with the sub, everything i was looking for and more.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif