Cheers mate,

Yeah its just a sub, amp and headunit upgrade ATM, I'm hoping it sounds good enough with the 4x50w from the kenwood head unit driving the factory front and rear's but if not I'll be swapping those out asap.

The reason for doing this upgrade is to be able to check my beat mixes on a bass heavy system while commuting so I want to get it sounding solid.

Yes, the box and sub are matched thats the reason i went for this particular one, its a single 12" version of this: Car Audio - Subwoofer Systems - BassWedgeâ„¢ and stuck with a JL amp to keep it all matched