Installed PinWoofer last night. I turned it up and whoooaaa, it packs a punch! Checked outside to make certain it wasn't too loud; it was. There's a feel to the Beast's voice now and the end-game bonus provides a nice, sharp, bang, bang, bang, bang. It's pretty neat.
The factory sound was garbled at the beginning of Flight of Icarus. I hoped PinWoofer would eliminate it. It might be better, but it's still there. I wonder if it has to do with the +/- gain settings (for every (+) there needs to be a (-) to prevent distortion). I dunno'.
The full speaker system and settings with 2 amps produces highs and lows missing from the factory setup. The sound boost is much more alive and the bass is sharp. I think every music pin should have something like this; it's really nice.