The BSL-15 is a high-power bass loudspeaker for use with external power-amplifiers, frequency crossovers and controllers. The flow-optimised reflex port is designed under aerodynamic aspects. It improves the acoustic efficiency and minimises distortion at low frequencies. Clear and powerful bass is reproduced starting from 33 Hz. The direct sound of the high-performance long-excursion 15“ driver offers excellent impulse response up to more than 130 Hz. The BSL-15 is the ideal match in the bass range and can also very effectively be used in combination with loudspeaker tops. A suitable subsonic filter and a low-pass filter for frequency crossover is suggested as a complement.

The BSL-15.sp is based on BSL-15 and additional equipped with an integrated state-of-the-art digital 2 x 750 W / 1 x 1500 W power-amplifier with switching power supply.

The BSL-15.x is based on BSL-15 and additional equipped with a built-in frequency crossover for direct use with fullrange power-amplifier.