The Q Acoustics QB12 12-Inch Sealed Powered Subwoofer is designed to deliver deep, controlled and powerful bass for home theatre and high-fidelity music systems. Its sealed enclosure and long-throw 305mm driver provide tight low-frequency performance while helping minimise unwanted cabinet and port noise.

At the heart of the QB12 is a 12-inch (305mm) high-current long-throw driver powered by a built-in 200W Class-D amplifier, capable of delivering up to 400W peak power. With a frequency response extending down to 28Hz, the QB12 adds depth and impact to movie soundtracks, music and cinematic effects.

The sealed infinite-baffle enclosure is particularly suited to listeners looking for accurate, controlled bass. An adjustable 40Hz–250Hz active crossover allows the subwoofer to be integrated more precisely with the main speakers and AV receiver.

Its reinforced MDF cabinet with internal bracing provides a solid foundation for the driver, while the substantial 21.5kg construction helps maintain stability during high-output playback. The QB12 also includes spiked feet, locking rings and spike covers for secure installation.

With its combination of a 12-inch long-throw driver, 200W Class-D amplification and sealed cabinet design, the Q Acoustics QB12 is a strong choice for upgrading the low-frequency performance of a dedicated home theatre or stereo audio system.