I have an mtx 4180 that drove 2 subs well, but it got hot too quickly and would protect itself. I recently bought one of the new Alpine v12's MRD M-500. I got it for 300 bucks off of Ebay and it is phenomenal. It cranks out 500 watts rms at 14.4v 2ohms 900 watts Max. Unfortunately, I may be selling it soon because it looks like I am moving to NYC and won't need my car.