Neumann KH 870 G10 Active Studio Subwoofer Neumann "10 Active Studio Subwoofer with 7.1 High Definition Bass Manager , 100 - 240 V, Anthracite (RAL 7021). 2x10 drivers, 400 Wpk 10 Active Studio Subwoofer with 7.1 High Definition Bass Managerâ„¢, 100 - 240 V, anthracite (RAL 7021). 2x10 drivers, 400 Wpk amplifier, 18 Hz -3 dB LF cut-off, 117 dB SPL at 1m Call for shipping information