Conclusion: This is a must have if you have a bazooka amp. Stop reading and buy it. It regulates the sound so much better and with the turn of a knob you can turn the bass from almost silent to bumping. Definitely worth the money.
Conclusion: i would not recommend this amp for low bass reproduction - while it has good power, especially for the price, the low pass filters kinda suck, you can't get sound reproduction below 60 Hz - i was disappointed because it was sold along with a really great Sony sub, which sounded great on my house/studio amplifier, but really sucked with the Bazooka amp.
Conclusion: My head unit can control the bass from the sub separately but this came with my amp/sub/box/wire kit. I installed it anyway, and it is nice to have. If you need to turn the bass down for a sec its a lot easier to do with this than scrolling through all of the buttons on the deck. Plus if you just want to tweak the bass a little for songs that don't have enough bass it takes seconds. Nice feature.