I recently purchased a PSW505 sub from Newegg to replace my 10 year old Infinity BU-120 12" 100w amp sub. Now I know the infinity sub has horrible reviews on the web, but it had a bit of punch to it and I have had no problems with it except for the woofer cracking at higher volumes.
I was really excited to get this new sub, but once I got it I hooked it up to the sub out on my receiver. I have also hooked it up the Polk recommended way through the main speakers out. Same result, it seems to have a lack of punch. Plus, as I turn the volume up on it, it seems to taper off the louder it goes. I am guessing a bad capacitor? I don't know. It doesn't seem as strong as the junky Infinity I am replacing. I called Polk, their customer service is TOP NOTCH! They are sending me a new amp, I guess we'll see then. Anyone else have an experience like this? I guess what I am looking for is a sub that I can tune to a comfortable bass level for general use, but I want to be able to crank it up from time to time to shake everything to show it off. :D