The Rumble-KU210 subwoofer is a high power passive subwoofer featuring one 10" neodymium transducer and one 10" passive transducer in a sub-shallow enclosure. The KU210 has no reflective openings, but uses passive radiators to ensure complete isolation of the device from foreign objects. The Rumble-KU210 is designed for maximum linear offset and minimum residual noise. Its neodymium transducer has a dual voice coil for two selectable impedance settings of 4/16 Ω (2 x 8 Ω), allowing the combination of up to 4 drivers, powered by only one channel of the Kommander-KA84 amplifier.