I don't have an answer for you right now, but Tracy details his cabinet construction with schematics on his site. I can measure the cab for you on Monday.

Double post.
 
(Message edited by cje on September 12, 2014)

This is a guitar cabinet, so I would imagine that Tracy's bass cabinets are either sealed or ported. No open back.  
 
I'd be curious about a sealed 15 for use with a K140, but I'm a little leery of the size and weight needed get the goods.

Hello Edwin , How are you ?  
 I have various incarnations of infinite baffle enclosures of this type varying from the Alembic A-15 ,  the Bag End design and actual cabinets from the Grateful Dead  Wall  of Sound  .
 
 The Bag End is the smallest and least heavy ,  the Alembic A-15 next and the  Wall of Sound enclosure is VERY heavy and massively large  . I remember have posting all of this somewhere in a thread  on this site before. I even did a  shoot out test with a frequency generator an RTA and a power handling test between a JBL K140 and a GAUSS 4580!  . As I recall you and I both commented on that thread .  
 
 Wolf

simple and elegant

Hi Wolf!  
 
One of these years, I'm just going to have to come on out with my bass and we can fire them all up!

Mike,
 
I  know I owe you interior measurements, but to answer your question, it is not a box-within-a-box design.  Think of it as a lip on the back, as if there was a back panel with a giant rectangular hole cut out, leaving just the edges.

Thanks CJ, I think what threw me off is the recess for the natural wood handle. I didn't realize that it was just a single one on the top of the cab. From the shot of the back, I was looking at the side panels trying to figure out how Tracy made that work.... My bad....

CJ:
 
So now that you've had some time with the SSP, how do you like it?  Do you know the unloaded weight?  I'm thinking about picking up a couple of 1x12s and selling my two 2x12 Ear Candy cabs to make my stereo rig a little more manageable - then I might actually use it!
 
Thanks,  Bill, tgo

Bill,
 
It is a fantastic cabinet.  It is very solid - no rattle, shaking, swaying, creaking, etc... Just confidently projects what the speaker is doing with that classic familiar design.
 
I'm quite happy with my preamp/amp/cab/speaker situation at the moment.
 
I don't know the exact weight, but I can tell you the shipping weight of an unloaded SSP Quarter is 18 lbs., so the cabinet is probably in the 16.5 - 17 lb. range.
 
Of course, with the mammoth Beyma Liberty 8 I have front loaded, it puts it on par with my Groove Tubes Soul-O 45 combo, but with a completely different tone.
 
The one thing about having the Beyma in the cabinet is that it does make it somewhat front-heavy, and it would not be a good idea to have the cabinet angled on an amp stand.  Instead, place it solidly on something that won't tip forward (I use my effects rack, which is a 10-space Kriz Kraft).

Nice workmanship on the tongue and groove joints and the ply is very substantial..I think I counted ten layers!.
Is there a protective grill for the front, there would always be some idiot accidentally kicking the driver.
I have built a few cabinets but just gone for the glue & screw jointing and then vinyl covering. These cabs are really in the 'furniture league@

There is a choice between a protective wood cover or cloth grill.  Both attach with magnets in the four corners.  I chose the wood cover for protection during transportation.

I bet Norm Abram from 'The New Yankee Workshop' could build some really class cabinets!.
I always like it when he says
 I hope you enjoy building this project as much as I did
Yeah of course I will Norm...as soon as I buy $30,000 worth of tools! Great craftsman though!