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Well guys after the hushmatt test I got to thinking. I know the W7 tends to perfer sealed boxes, and I don't have a ton of room to work with, but what are my other options?

Does fiberglas have a lower resonant frequency than MDF?

What about going with a smaler or larger box, instead of the 1.375 JL recomends?

I am sure you see where I am going with this.

I even thought about going with an AP enclosure, but the QTS of the W7 is a little higher than what I found recomended.

Maybe a TL, but I would need help designing it.

So lets here some ideas. I can build about anything you can come up with. I just need some ideas, or theories to play with.

I will try to get some dimensions later tonight, so we know how much room we have.

well when you talk AP enclosures, then TL and QTS, I have N O idea what you are talking about l m a o

http://www.caraudiomag.com/technical/0206cae_boxbasics/

http://www.usdaudio.com/products/ap.php

I tell you what, this is the most educational website there is!! lol

I have been toying with the idea of an aperiodic enclosure for some time now.

thanks for the link Jeremy

1/4 wave TL box.

Figure the 1/4 wave @ mic point...

Ohhhhh nice....

BTW I think thats what the beretta is getting. Bit I literally have the whole back seat/trunk to work with

Pete at http://www.toxicforum.com has some CRAZY designs that you could tinker with.

How do you know if you got alot done in a day? You look like me. (the pants and jacket are black and blue)

The 12W7 doesn't really incline itself well for a AP or TL enclosure. If anything, infinite baffle would be better. TLs like a sub more inclined to ported enclosures, .3-.4 range if not lower.

Qts of .5 isn't damped enough to do well in either enclosure. The sub does have enough excursion to do well IB, and would give good SQ with an absence of the resonance of sealed and ported enclosures.

"Does fiberglas have a lower resonant frequency than MDF?"
The panels, or the system resonance? System resonance is going to depend on the subs suspension and box volume, in which it really isn't going to matter which one you use. The resonance of the material itself is going to depend on rigidity, in which fiberglass is going to resonate at a higher frequency than MDF because it is typically stronger. Depends on how thick the glass is, too. Same reason plywood resonates at a higher freq. than MDF.

"What about going with a smaler or larger box, instead of the 1.375 JL recomends?"

If anything go larger, aim for a .707 alignment for flat frequency response, a flat delay response is produced with an alignment of .577. Pick your poison, either is going to be a really large box, though.

Ok I could Google it like normal, but I will jusrt ask it will be faster. What is the diffrence in a flat frequency response, and a flat delay response? How does the flat delay responce affect SQ compared to a flat frequency responce?