Bass-reflex design with high SPL and penetration thanks to a 320 mm (12”) high-frequency magnetic woofer with a 75 mm (3”) voice coil. Frequency response from 40Hz to 140Hz. This sub features a new amplifier designed and manufactured by FBT, 700W RMS LF in class D, digital signal processor with 8 presets, 2 equalizations with 2 LPF crossover settings, cardioid configuration, control panel with stereo XLR inputs/outputs, volume, EQ presets, 8 delay steps from 0.25 m to 3.5 m, phase change switch 0°-180°, 3 status LED indicators. The 15mm (0.59”) thick birch plywood construction is scratch resistant and internally reinforced. M20 (20mm) top socket for speaker stand and two aluminum ergonomic FBT handles ensure convenient transport and configuration.