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Old 15th February 2011, 09:04 AM   #421
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Quote:
This has left me wondering thus, if jbell is powering a stadium with 4 of the big cabs, I'd expect the small cabs to do better.
powering the stadium to what levels though? I mix pretty bass heavy.
i reckon 8 ss15 (pack space of 4 big cabs) would be a lot of bang!
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Old 15th February 2011, 09:55 AM   #422
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Quote:
Originally Posted by djk View Post
"I'd expect the small cabs to do better. "

For that application?

Probably.

But you live and learn and the original is installed and working, and for the next installation you can use what you learned.
Thanks djk. It is true that we learn from past experiences. Right now, I have 6 Nos. of double 15s ported cabs with 3015LF. With each cab driven hard by a single channel of QSC 4050HD, I am able to cover a crowd of over 2000, for both live and recorded music and both indoors and outdoors. I am looking for something better than this. Maybe your PPSL or 12Pi may be the answer, ofcourse, amps also needing to be replaced with much higher powered ones.
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Old 15th February 2011, 01:29 PM   #423
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Originally Posted by FlipC View Post
OK
Seems like all the drawings in here are different. I have already cut a sheet via the cut sheet. Doesn't seem to line up to the layout drawing.

Post a corrected finalized drawing?
FlipC,

I took all my dimension right from the pdf file. It's all good. Isn't the cut sheet just a rough cut guide? I'm guessing here.
see: singlesheet_2_2010_aug18_dwg.pdf

Last edited by runrod1948; 15th February 2011 at 01:34 PM.
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Old 15th February 2011, 01:32 PM   #424
jbell is offline jbell  United States
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Quote:
Originally Posted by Samuel Jayaraj View Post
Thanks djk. It is true that we learn from past experiences. Right now, I have 6 Nos. of double 15s ported cabs with 3015LF. With each cab driven hard by a single channel of QSC 4050HD, I am able to cover a crowd of over 2000, for both live and recorded music and both indoors and outdoors. I am looking for something better than this. Maybe your PPSL or 12Pi may be the answer, ofcourse, amps also needing to be replaced with much higher powered ones.
I know I have personally learned much since my original attempt at designing TH cabinets.

A 'cheap' suggestion for you samuel. Build a pair of the ss15 cabinets, and transplant a couple of your existing 3015lf's in them. Then do an A/B comparison between one of your dual ported cabinets vs a pair of the single driver loaded ss15's. Walk around in front, side, behind them while they are wound up to 'normal' levels... take an spl meter and do some simple tests outdoor and see what you see.

It only costs you two sheets of plywood to see if a tapped horn type cabinet will get you to your goal vs your current ported cabinets.
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Old 15th February 2011, 07:27 PM   #425
FlipC is offline FlipC  United States
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I noticed the notes on TB's PDF.
That the cuts were trimmed. Will remeasure using the MM version.

And Samuel -
I'm with JBell. Throw 2 of these cabients together and compare. I would be astounded if you DONT get better performance from the SS15. Especially outdoors. TH's give you the clean quick attack of a reflex with the sensitivity of a horn. That means you probably wouldn't have to replace your amplifiers.

I am currently building my first.
After I get it together and how I want it. (will mod for handles) I will be building a total of 12. 2 stacks of 6 at 5.5'x6'. I already have a bigger version (Apache 15Mk2) But space & weight savings of the SS15 make up for the bit of loss of low end frequency.
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Old 16th February 2011, 12:34 AM   #426
FlipC is offline FlipC  United States
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So the cut list drawing is indeed incorrect.
Got to go get some more wood now.
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Old 16th February 2011, 01:05 AM   #427
jbell is offline jbell  United States
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Quote:
Originally Posted by FlipC View Post
So the cut list drawing is indeed incorrect.
Got to go get some more wood now.
cut sheet should be right, how thick of a blade did you use?

The easiest way to assemble this is to use the 'swinging gate method'

Glue the front board to the first side.
line up the baffle board, and mark so that you are about 1/4" longer from the end of that board to the bottom vs the back. draw both sides, predrill, glue, screw in place.

Then do the same thing for the board that goes up to the back, mark where it is about 1/8" or so longer to the back vs the top. Repeat installation step for that board.

Then you can do the board directly above the baffle, and the the vertical board connecting to it. (they are the most critical to get dimensions accurate) Then it is easy to put on the top, and place the board that connects to the top. add back and bottom and you are done. Dry fit the 2nd side, draw all of the interior panels you can reach. remove 2nd side, complete marks for all of the interior panels so you can predrill, glue and screw in place. This assures you never miss a panel with a screw.

I can easily do a quad set in a day this way.

Last edited by jbell; 16th February 2011 at 01:11 AM.
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Old 16th February 2011, 10:04 AM   #428
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Thanks FlipC and jbell for your responses. I too think, there's nothing like a direct comparison. So I'll make some sawdust and report back.
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Old 16th February 2011, 07:27 PM   #429
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Quote:
Originally Posted by Samuel Jayaraj View Post
Thanks FlipC and jbell for your responses. I too think, there's nothing like a direct comparison. So I'll make some sawdust and report back.
Samuel,

Excellent choice, looking forward to your reports.

Art
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Old 18th February 2011, 01:38 PM   #430
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After discussing the plan to go ahead with an experimental build of the SS-TH15, I was going through the whole thread and noticed a few thought experiments by jbell and Don to get the box to go a little lower (albeit sacrificing a little spl). Some of these are not simmed in HR. I am attaching these drawings below to find out because I would like to have an FR below 40Hz. If the build is successful, I plan on making 12 of these boxes as I already have 12 drivers in double 15 cabs.
Attached Images
File Type: gif BellsCube.gif (8.6 KB, 764 views)
File Type: jpg singlesheet7.JPG (99.1 KB, 763 views)
File Type: gif SmallBell.gif (5.5 KB, 751 views)
File Type: jpg ss15upgrade.JPG (73.2 KB, 761 views)
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