Subwoofers
From Amazon
In Phase Car Audio USW10 300W 10" Underseat Ultra Slim Compact Active Subwoofer System, Die-Cast Aluminium , Black
Halfords
In Phase Usw10 300W Underseat Subwoofer With Wiring Kit And Bass Remote
OnBuy
IN PHASE Audio USW10 300 Watt Underseat Active Subwoofer including Remote Bass Controller/Wiring Kit - Black