Amazon.com: Car Subwoofer by Massive Audio HIPPOXL84 - SPL Extreme Bass Woofer - 8 Inch Car Audio 700 Watt HippoXL Series Competition Subwoofer, Dual 4 Ohm, 2.5 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: Car Audio Dual 10" SPL Bass Subwoofer Labyrinth Vent Sub Box Stereo Enclosure : Electronics
Amazon.com: DS18 HOOL-X15.2DSPL Hooligan X 15 Inch SPL Car Audio Subwoofer 4000 Watts Rms 4" Dual Voice Coil 2-Ohm DVC 2+2 Ohm (1 Speaker) : Electronics
Skytec SPL-700 Stereo Power Amplifier Home HiFi 19 Inch Rack Mount PA DJ Amp with USB SD MP3700W: Amazon.co.uk: Musical Instruments & DJ
Skytec SPL-1000 PA Amplifier for Karaoke Stage and Concert (MP3-Enabled USB SD Slots, 2800 Watt, FM Radio) White : Amazon.de: Musical Instruments & DJ