SoundTube SM1001 10" Subwoofer in Black with Passive RadiatorSoundTube SM1001 Subwoofer in Black The SM1001 is a 10 subwoofer with a passive radiator to generate deep, high output bass response. The SM1001 uses a proprietary 10 inch high excursion, ultra long throw mica graphite polypropylene driver and a downward firing bass radiator. The efficient long throw designs are superbly linear, making the SM1001 an ideal complement to any music system. The driver is attached to a 1. 5 inch MDF baffle to eliminate