Earthquake Sound, renown for powerful subwoofers, unleashes their Supernova MKVI, with its 15" driver, 15" passive radiator, and 600 watt amplifier. It will produce 110 dB at 15 Hz, and has low distortion. And did I mention it is in a not so huge enclosure?
See the Earthquake Supernova MKVI Subwoofer Full Review
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