The B-12.Sub.i is a compact bass loudspeaker without internal passive crossover for use with already filtered power amplifier signals. Developped particularly for fixed installations based on the B-12i cabinet in bass-reflex design, it already features numerous mounting points. The powerful 12“ bass driver with 4“ voicecoil is identical to the unit used in the B-12.i and excells with long linear cone excursion and thus with precise and deep bass reproduction at very low distortion.