MTX 3512-04 12" Subwoofer + Portable Bluetooth Speakers

This bundle combines the MTX 3512-04 12" car subwoofer with a pair of Rockville RPB3-BLACK handheld Bluetooth speakers, covering both a car audio upgrade and a portable listening option for everywhere else. The 3512-04 handles 250W RMS through an Inverted Apex surround for higher volume displacement and Spider Plateau Venting to manage voice coil heat, delivering clean, strong bass at 4 ohms for straightforward amplifier matching.

The RPB3-BLACK speakers are built from aluminum and use TWS technology to link the two units wirelessly for true left-and-right stereo sound instead of playing the same mono signal from each. Bluetooth 5.0 connects to a phone or laptop from up to 25 feet away, and a built-in microphone lets either speaker handle hands-free calls. A 300mAh battery and 40mm driver keep the pair small enough to slip into a bag, and a built-in SD card slot adds a way to play music without Bluetooth at all.

Together, the two pieces cover very different situations from the same purchase: the 3512-04 adds serious low end to a vehicle's sound system, while the RPB3-BLACK pair gives you a stereo speaker setup that travels wherever a phone does.