Ground Zero GZTB 120F boxed subwoofer 12" (300 mm).

Ground Zero GZTB 120F boxed flat subwoofer 12" (300 mm).

Ground Zero loaded enclosure with a 12″ driver is built to fit tight spaces. 
Depth is only 11.0 / 19.5cm. 
Goes behind sets to many vans and trucks. 
Very handy solution to mini-vans in to the side of the boot. 
Does not take much space in trunk even installed behind rear seats. 

Tight and accurate sound from a sealed enclosure plays also the lower notes. 
Both 2 ohm voice coils have own terminals outside the box, so it is easy to connect 1 or 4 ohm load depending what kind of amplifier you have.