Fill your vehicle with bass, not equipment Want to put some bass in your vehicle without a lot of fuss? Sound Ordnances B-8PTD powered subwoofer is the latest version of the B-8PT, one of our all-time best-selling compact powered subwoofers. Sound Ordnance built this new version to perform even better than its predecessor, putting a cool-running 125-watt amp and a rugged aluminum 8" sub in an extremely compact, solid ABS plastic enclosure,so you get years of bass satisfaction. This all-in-one unit frees you from having to deal with a separate sub, amp, and enclosure, saves you cargo space, and simplifies your wiring requirements. Whether its mounted under your car seat or in an out-of-the-way location in the cab of your truck, this little workhorse will surprise you with its impressive bass and its ability to mesh perfectly with the rest of your system. This compact sub delivers strong bass without taking up much space. Big bass from this tough little sub A 125-watt RMS Class D amplifier powers the sub and lives on a compact circuit board mounted inside the enclosure. The subs stiff 8" aluminum cone holds its shape even when playing hard, helping to keep the lowest notes clean, and ensuring a long life for the sub. You can adjust the low-pass filter, variable phase control, and bass boost to get the B-8PTD sounding perfect in your vehicle. Preamp- and speaker-level inputs allow convenient connection to just about any system, even a factory stereo. The molded ABS enclosure houses a 125-watt amp and a tough little 8" sub. Good design helps The B-8PTDs tough outer casing of molded ABS plastic serves as the subs sealed enclosure and can withstand some pretty extreme internal pressure changes with no reverberating or buzzing. Sound Ordnance conveniently located the neat, clean, easy-to-understand controls on one side, opposite all the connections, so you wont get tangled in wires as you tune your bass.