I have for sale my 12 ' sub and perfectly matched/tuned box. Purchased from The loudest.co.uk in June. The sub is in perfect working order and is absolutely insane. Do you dare make your vehicle the rudest, loudest mobile sound system in the neighborhood? see the loudest.co.uk for details..... Mine is the 3000watt, 1000w RMS sub, the box is the custom box they sell. On their website you can read a number of customer reviews about this sub/box combo. It really is quite bonkers! The custom box is perfectly tuned for this exact sub, its dimensions are an exact match to the T/S parameters of the sub - resulting in quality, tight bass. In addition, the box comes with the option of adding a face plate to remove the port, resulting in more cone control and a tighter feel to the bass (perfect for some house/techno style low mids and kick) or...