Pioneer TSW304R Subwoofer 12" 4 Ohm with Pioneer GM-D8601 Mono subwoofer amplifier 800 watts RMS at 1 ohm and Amplifier Wiring Kit SPEAKERS : Pioneer TS-W304R Champion Series 12" 4-ohm subwoofer AMPLIFIER: Pioneer GM-D8601 Mono subwoofer amplifier  800 watts RMS at 1 ohm Amplifier Wiring Kit** CUSTOMIZATION:Choose your free air freshener (assorted colors)