Pioneer Shallow Subwoofer

Normally to get good bass in your car, you'd need to get a couple subwoofers and an enormous box to keep them in. Not anymore, thanks to the Pioneer TS-SW2541D Shallow Subwoofer ($180). It doesn't need the room of a normal sub (just 3" of depth), so you can stick it out of the way — in places like under a front seat, behind the rear seats, or anywhere else you can make it fit. It's about time clear, loud bass was available without turning your car into a roaming stereo.