Rockford Fosgate's IBeam tactile transducer gives you the kick of a good subwoofer, without having to crank your system up to a high level. The IBeam attaches to a hard surface in your vehicle, vibrating when it receives a low-frequency signal from your amplifier. You get the feel of powerful bass through your body without high-volume sound output caused by compressed air.
The compact IBeam doesn't need an enclosure, so you can mount it under your car seat or center console great for small vehicles that just don't have room for a sub. It can handle up to 250 watts RMS, so you can use it in conjunction with a sub or all by itself.