You can't fit 12s into the mark... unless you "tilt" them. If memory serves me right the trunk only clears 13.5" which doesn't leave enough room for enclosure.
I have had 3 different subwoofer systems in my marks.
My latest one was 3 10" kicker L7s with a kicker ZR1000 beast punching them... The fit perfect and I was able to push them all the way to the end of the trunk
I don't think I will go that big again...
My current vette has a single 12" Elemental Designs sub with the same ZR1000 amp. And produced plenty of punch.
I'd highly recommend going with a good quality sub/enclosure and a class D name brand amp.
I had 12" L7's in my trunk with no tilt, its all in how you cut the box. fit like a glove too, man i miss that bass. don't feel like cutting up the LS yet to modify it, the THX system is decent enough for now.
Ive seen a Mark out here where they cut the whole for the subs where the rear deck was and put 2 12's that was interesting. Anyways, it will all be about the cut, I agree. Thanks
Properly done rear deck setup sounds spectacular. You need to reinforce the deck with MDF, and use proper free air speakers. Sealing it all is a bit of a challenge, but what isn't
Can't beat the space and weight savings either. Here's a shot of work in progress in one of my old m8s. It's was definitely a quality over quantity type of sound.
when i replaced my head unit, i rewired everything so the upper two door speakers are run off the head unit's front channel, and the other four speakers are run by a 250w amp, they're only split into two channels so the front/rear fade on my head unit mixes between the tweeters and the other 4. it was easy to do since i mounted the 250 to my sub box in the trunk, it was close enough to the factory amp's location i only had to extend a few wires