Mtx Sub Enclosure Ideas

If this enclosure truly has an F3 of 13 Hz, then you will have exceeded all my expectations of 10" subs.

I took a quick look at this MTX driver in WinISD pro.  This driver has an EBP of 44 and so is best suited for a sealed box, for sound quality.  You can extend the low end response a bit by porting at the expense of some peakiness in the response.  The port, at 60 square inches, would have to be about 34 inches long to achieve the response shown here, tuned at 20 Hz.  Gray line is vented in 10 cu ft net (add the port displacement)...and the yellow line is also 10 cu ft net.

If it were for me, I would use the sealed.

mtx_t5510-04.jpg

killer sonata, you found it to be wrong because you made mistakes using it.  Being a free program doesn't make it more prone to error than if you had to pay for it.  You sound like some people I had to be on a jury with.  They had that same close-minded attitude about "questioning authority". 

What are these "generic specs" you are talking about?  Does this guy who works for MTX have the actual subwoofers in question and is testing each one of them?  No, he's not.  I linked the published specs, and those can be used to the same degree of accuracy that the online "tech" used...whatever software you want to use.  Find an F3 of 13 Hz...it doesn't matter to me how much you want to pay for the program; it won't get there.  At least not with a 10 cu ft box, and not much lower at all with a 20 cu ft box.  You'll realistically get 35 to 40 Hz F3 like I showed above.  And the bandpass idea was pure stupid wasted time considering it's for an end user who desires to listen to music.

I gave the OP some help that took me time to research.  He came to this forum asking for other opinions.  You are out of line to question it unless you do at least an equal amount of research yourself and come up with something different.  Use a program you paid for...whatever you want.  If you don't have anything more substantial to offer than that, don't minimize my efforts in helping the OP build a suitable box.