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Old 19th December 2011, 12:56 AM   #61
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Quote:
Originally Posted by reminence View Post
Is there no way to get this design to be a carry-able weight (one person) ie 30-34kgs? if I use thinner material and this driver? JDs Sound and Lighting. Ande 15" LB15-1 350W driver / speaker
Small-loud-40Hz and below - pick two :-)

The only way to get a smaller cabinet is to use a smaller driver. Even then, the folding may have to be a bit different. One possibility - look at car audio "SPL" type 10" drivers (50 Hz<Fs<60 Hz, 0.3<Qts<0.4, good Xmax). It should be possible to get a good TH out of them, but you're going to lose 3~6dB of sensitivity in the process. However, you can build multiples of these to get back that efficiency, and each box should be quite portable if done right.
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Old 19th December 2011, 04:44 AM   #62
mimura is offline mimura  Thailand
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thank you

Last edited by mimura; 19th December 2011 at 05:07 AM.
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Old 30th December 2011, 03:45 AM   #63
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Quote:
Originally Posted by tb46 View Post
Hi Crescendo,

In the singlesheet thread I suggested a bigger version, about 22"x32"x48", would that be too big for you? It goes roughly 10Hz lower than the SS15.

Regards,
Did you post an image/plan/hr input or just the idea? If you did, approximately what page?
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Old 30th December 2011, 03:49 AM   #64
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Quote:
Originally Posted by Dag Johansen View Post
Cluster of four @ x-max, not bad i think.
It is worth to notice the size of this cab, it is actually small, about 30% smaller than TH-18 (Xoc1's design) and TH 115/TH 118 by Danley.
Click the image to open in full size.

Dag
Is this modelled w/the LABs? I don't get nearly that smooth of a response to 40Hz (and -7 or 8dB @ 35) w/the HR input info you gave in post #9 w/the 3015LF

Click the image to open in full size.

Last edited by CRESCENDO; 30th December 2011 at 04:18 AM. Reason: added pic
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Old 30th December 2011, 09:09 AM   #65
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Hi Crescendo, i'll admit this tread is a little confusing.
The 3015LF version is over and out, it sounded good, but the cone came loose from the spider using less than 500 watts even setting the subsonic to 35Hz.
Now it is LAB 15 and it sounds very good, it have all the atributes of a good TH.
Here are my Hornresp inputs, i have meassured my own set of Thiele-Small data after some break in. (its not that different from the manufacturers data)

My goal was to hit 100dB's @ 40Hz, and i think i have done that.

Click the image to open in full size.

Black trace, 4cabs - grey trace, one.
Click the image to open in full size.

Dag
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Old 30th December 2011, 11:08 AM   #66
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That looks great - terrific job!

That's too bad about the 3015LFs; I've got 6... 2 are in jbell's SS15s, 2 are in BFM T48s and 2 are still in the box. But, I'm looking for more <40Hz for the dnb/dubstep shows I do, so the search continues (until more money comes along to buy more amps and build some 18" THs).

Keep up the great work!
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Old 30th December 2011, 12:32 PM   #67
epa is offline epa  Netherlands
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Quote:
Originally Posted by CRESCENDO View Post
That looks great - terrific job!

That's too bad about the 3015LFs; I've got 6... 2 are in jbell's SS15s, 2 are in BFM T48s and 2 are still in the box. But, I'm looking for more <40Hz for the dnb/dubstep shows I do, so the search continues (until more money comes along to buy more amps and build some 18" THs).

Keep up the great work!
hi justen
a straigt th of 6 or 7' long works wel for the 3015 ,all area's 1000 or 1100cm2.
not verry efficient but with 3 a side ,wil preform good till 30 hz in a 250-300 ltr cab

Click the image to open in full size.

easy to design and bild
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Last edited by epa; 30th December 2011 at 12:43 PM.
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Old 30th December 2011, 09:30 PM   #68
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Looks pretty good for the size. What are the L12, L23, L34, etc #s? Feel free to pm me if we shouldn't take focus away from Dag's topic. I'm not trying to hijack, Dag - promise.
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Old 8th January 2012, 11:59 AM   #69
r23d is offline r23d  Australia
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Default Looks like this box meets the single sheet challenge too...

Nice work Dag
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Old 8th January 2012, 12:49 PM   #70
r23d is offline r23d  Australia
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Sorry, my mistake - just a little more than 1, but still neat...
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File Type: png Dag Johansen 40hz box.png (138.5 KB, 151 views)
File Type: png Dag Johansen 40hz box 2.png (91.2 KB, 106 views)
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