Ground Zero GZ 777 active subwoofer basskit (2 x 300 mm).

Ground Zero BASSKIT GZ 777 active subwoofer kit 12" (300 mm).

1-channel subwoofer amplifier with class D circuit, integrated active crossover and black anodized heatsink Mono amplifier 
Class D technology Variable active crossover and bass boost, phase shift Stable power supply Large terminals 
Black anodized heatsink with Ground Zero lettering Bass remote control included High-level input with auto-on function. 

Passive vented enclosure including two 12″ IRIDIUM SPL subwoofers with EFP front bass channel and angled rear wall 12″ vented SPL subwoofer loaded enclosure 
Subwoofer GZIW 12XSPL-D2 Front vented Wooden enclosure Push terminal