7515-44 Subwoofer + Portable Bluetooth Speaker

This pairing covers two very different listening situations with one order: a 15" MTX 7515-44 competition subwoofer for the car and a Rockville SONIC-XXL portable Bluetooth speaker for everywhere else. The 7515-44 is a dual voice coil, 4-ohm subwoofer rated for 750W RMS and 1500W peak, built with an Inverted Apex Surround for added Xmax and SPL and a dual layer thermal system, Spider Plateau Venting plus a t-yoke heat sink, that keeps output steady during long sessions instead of falling off as the coil heats up.

The SONIC-XXL takes over once you are out of the car. It is an oversized portable speaker with 70W RMS of power, dual passive radiators, and DSP tuning across three selectable EQ curves, from a bass-heavy default to a flatter setting suited for outdoor listening. Three internal batteries running in series push the voltage to 11.1 volts, part of why this speaker outperforms units that cost several times as much. It streams over Bluetooth 5.0, plays back from an SD card or USB stick up to 32GB, and carries an IPX5 rating so it holds up by the pool, at the beach, or in the shower. Battery life runs up to 24 hours at low volume and around 3 hours at maximum output, with a 3 hour fast charge time to get back in the mix.