Stereo Integrity HT18 DIY build

I had no idea that Stereo Integrity was located a few minutes from my home! 
The new 18" H/T subwoofer looks like a great deal:
http://stereointegrity.com/product/ht18-18-subwoofer/
This flat pack sealed box offered by DIY Sound Group:
http://www.diysoundgroup.com/sealed-subwoofer-flatpacks/4-sub-flat-pack.html
I already have an amp, so this would be an 18" H/T sub for right at $300. That seems like a really good deal.
Anybody run one of these SI 18" subs?

The new 18" H/T subwoofer looks like a great deal:
http://stereointegrity.com/product/ht18-18-subwoofer/
This flat pack sealed box offered by DIY Sound Group:
http://www.diysoundgroup.com/sealed-subwoofer-flatpacks/4-sub-flat-pack.html
I already have an amp, so this would be an 18" H/T sub for right at $300. That seems like a really good deal.
Anybody run one of these SI 18" subs?
Comments
I got the 15" version but the 18 makes a great ht sub.....
I'd have got it if I wasn't so cheap lol...
I am going sealed based on these results:
http://www.data-bass.com/data?page=driver&id=46
I have a buddy with both but getting our schedules to align has been hard.
While your there see if they have any B-Stock D2 15" woofers too
I might be interested in purchasing another one just for the hell of it.....
Will have to take a look.
Get em to show you the 24" sub too lol, that's what you should have gotten Lol
https://youtube.com/watch?v=u3xETdaNQBg
however, He reported that his stairs were pulling from the wall and created damage!
http://www.avsforum.com/content/type/61/id/174397/
https://www.youtube.com/watch?v=LSYWgETlsPU&list=UURXYFAP01iqp83P9tTl5n_Q
https://www.youtube.com/watch?v=1l63PpHJ_lE&list=UURXYFAP01iqp83P9tTl5n_Q
HDTV - Sharp AQUOS LC-70LE600U 70" | AVR/Streamer - Onkyo TX-NR3008 | Amp - Parasound HCA-1203A
Blu-Ray/Media/Gaming - Sony PS3-320GB / Microsoft Xbox One | Broadcast - Xfinity X1 Platform
Front Spkrs - Coming...DIY Statement II | Center Spkrs - Coming...DIY Statement II | Rear Spkrs - Artison Portrait LRS
Sub - DIY Stereo Integrity HT 15 | Sub Amp - Dayton Audio SA1000
Wire - Audioquest Type 4, BJC Belden 5000 | HDMI - BJC Belden | Power Cables - Pangea | Surge - Monster
https://www.facebook.com/pages/Stereo-Integrity/143175079052824
Weird it looks a LOT like the old sun fire sub woofers
Or for those of you who need to keep the Mrs. happy in terms of WAF, buy some BM MkIVs and build them under each seat, or perhaps 4 under the couch. She won't complain when it starts vibrating right under her
YAΘIN MS-20L, polkaudio RT5
- Main Rig -
Pioneer SC-37, Overnight Sensations, Samsung 52" LCD
- Currently In Progress -
Curt Campbell's Uluwatu LCR, LMS Ultra Gjallarhorn, JBL W15GTi stereo subs, 2.1 entertainment system for the gf
FYI OP Jim likes maaad bass had a great time at DSkips last gathering. Jim brought a monster DIY sub
Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
Gear on standby: Melody 101 tube pre, Unison Research Simply Italy Integrated
Gone to new homes: (Matt Polk's)Threshold Stasis SA12e monoblocks, Pass XA30.5 amp, Usher MD2 speakers, Dynaudio C4 platinum speakers, Modwright LS100 (voltz), Simaudio 780D DAC
erat interfectorem cesar et **** dictatorem dicere a
YAΘIN MS-20L, polkaudio RT5
- Main Rig -
Pioneer SC-37, Overnight Sensations, Samsung 52" LCD
- Currently In Progress -
Curt Campbell's Uluwatu LCR, LMS Ultra Gjallarhorn, JBL W15GTi stereo subs, 2.1 entertainment system for the gf
YAΘIN MS-20L, polkaudio RT5
- Main Rig -
Pioneer SC-37, Overnight Sensations, Samsung 52" LCD
- Currently In Progress -
Curt Campbell's Uluwatu LCR, LMS Ultra Gjallarhorn, JBL W15GTi stereo subs, 2.1 entertainment system for the gf
So you're all about that bass.... bout that bass..... no treble....
Pictures of the massive 18" driver:
And MAN that sub looks nice.... cant wait to get mine finally done..
However they have a lot of new drivers in the works coming soon.
HT - Polk 703's * NAD T-758 * Adcom 5503 * Oppo 103 * Samsung 60" series 8 LCD
http://www.parts-express.com/acry-tech-duratex-roller-grade-speaker-cabinet-texture-coating-black-with-textured-3-rolle--260-111