i just wanted to share a thought, it seems to me that many people here buy a sub that takes 300rms and then get an amp that can push 300 rms. its a mistake. if your amp is running 'full tilt' or 300rms all the time you will get several problems (overheating and clipping etc) so if you have a sub that can take 300rms, get an amp that can do 500 or 600, this way your amp will not be struggling to push your sub, bass will sound cleaner and equipment will probably not get destroyed. its a basic outline on my bass experienc over the years, overpowerd subs sound better and last longer than underpowerd.