I know

Its iffy. I ran JL's for quite a while and they sounded fine without any problems. Sometimes they sound as if you have your hands over your mouth while talking. Also, quite overpriced.

As a previous JL Audio user, I'd say no.

Great, i was dreading buying their stuff n have it as good or better than others for 1/2 the price

Just an example from a couple years ago.

JL offered a 250.1 @ $385, while Rockford offered a P300-1 @ $199. The P300-1 was also known to push out about 450 rms.

MB Quart is a great brand just saying don't be pushed away by price it doesn't always mean everything JL is VERY pricey for what you get in 90% of cases.

Do they publish their power cube results? I'm just wondering cuz I'd be curious to read them. I think MB Quart is a fantastic company.

I'm not sure all I know is a friend of mine runs one of those on 4 sets of Crescendo Pro 6.5's and it's rediculously loud and clean and I love it and yes MB Quart is a fantastic company.

Aight, for the Sub( or 2x) i saw a video where they just made the rear half of the trunk the chamber and had the old sub placement drilled out so the sound flows through that, good idea?

Was told it would create some heavy rattling

Check into that, are you familiar with power cube?

That could work it depends