Buy it only if you enjoy repairing vintage gear and crave a nostalgic, warm, boomy bass signature for a secondary retro stereo system. Otherwise, pass it by for a modern powered sub.
Instead of a bass reflex port (which can cause "chuffing" noise), the SSD902AV uses the passive radiator to tune the enclosure to a very low frequency (usually around 30-40 Hz). The result is a "boomy," warm low end that was perfect for synth-pop, rock drums, and the explosive sound effects of Top Gun or Terminator 2 on VHS. sony ssd902av
on the device? I can provide specific specs if you have a photo or a different spelling. Buy it only if you enjoy repairing vintage