Orkney Real Hifi - Yamaha yst sw1500 1000w RMS subwoofer 16hz bass extension, with 12" servo controlled massively constructed bass driver. If comparing this unfavourably to car subs,its worth knowing that the
Yamaha YST-SW 1500 | hifi-wiki.com
YAMAHA YST-SW1500 specifications Yamaha
Yamaha YST-SW1500 Subwoofer System Manual | HiFi Engine