Neumann KH 810, Active Studio Subwoofer, 10"", 7.1 High Definition Bass Manager, Frequency range: 18 Hz - 300 Hz, 110.7 dB SPL (1m), Crossover frequency: 80 Hz, Magnetically shielded, Analog output: 8 x XLR, Dimensions: 360 x 330 x 645 mm, Weight: 26 kg