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-SW1500 specifications Yamaha
Yamaha yst-sw1500 30.5 cm Alimentado Buque Insignia Subwoofer (Negro) (Descontinuado por el Fabricante) : Amazon.com.mx: Electrónicos