Hello Jim, as for data on the EV EVM 12L, the Bl=20Tm
The older EV 12L EDS did not have Bl listed, however the magnet structure is shared with the DL12X, a newer similar woofer. Newer is circa 1990!
http://pdf.textfiles.com/manuals/STARINMANUALS/Bosch - EV/DL12X.pdf
For your interest in the folded Klipsch horns, the origional motor for the Jubilee was the Klipsch K-31E used in the Klipsch model HLH-30.
Attached are: EV DL12X EDS.pdf, Klipsch K-31 specs from internet, and scans of pages 3 and 4 from the AES paper vol 48 #10 from Oct 2000. The scans have the T/S requirements for the Jubilee woofers.
As for finding the older EV woofers, I got mine on eBay. I have 4 x EV 15L, 5 x EV 15B, and 2x EV DL18MT loudspeakers in my DIY builds.
The EV12L is still sold in several versions, Amazon has them today:
Amazon.com: Electro-Voice EVM12L 12" Classic Guitar Loudspeaker, 200 Watts at 8 Ohms: Musical Instruments
good luck with your builds! chris
Attachments
Chris,
Thanks so much for the attachments.
OK, this is the part where I could use some help.
The attachment called Jubilee Flare Rate Table has a portion of attachment that you posted, and I scratched my head for some time trying to work out the distance-and-areas for corresponding flare sections of the horn. My only conclusions are: 1) either I am misreading the table, or 2) the table has a typo.
When I model the horn flare rate from the table, one can see the resulting sections in Hornresp, and the flare does not look right (see 10 and 11.jpg).
After modifying the shape to get essentially the same flare rates as listed in the table, then section distances and areas are different than those listed in the table.
Modeling either case, shows a very poor SPL response. Notice no low end close to 40 Hz? I expect that the low fs of the driver is primarily responsible. Maybe some other DIY's can shed some light on this.
Jim.
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Hi freddi,
Thanks for the info. The Jubilee curves that you posted do seem similar to the second one that I posted. It does seem to confirm that the low response does not go flat to 45Hz like the Klipschorn.
Jim.
Hmm, with a 'rubber' throat + expo there's normally basically just two flare frequencies, so 97+[35/40] is near enough.
In a compression horn, Fs is normally near/at the flare frequency, then tuned up to whatever Fc is desired, so if Fs = 21 Hz, then combined with a 40 Hz expo + conical corner flare that's about right with an Fc in the 47-58 Hz range based on the specs in post 62.
GM
In a compression horn, Fs is normally near/at the flare frequency, then tuned up to whatever Fc is desired, so if Fs = 21 Hz, then combined with a 40 Hz expo + conical corner flare that's about right with an Fc in the 47-58 Hz range based on the specs in post 62.
GM
Hello Jim, The AES paper is not a plan for building, but the idea of how the Jubilee might better the Klipschorn . The construction plans are not available.
I am attaching the other pages of the AES paper vol 48 #10, 2000 Oct.
You have page 3&4 already,page 1 is the cover sheet, 8 & 9 are acknowledgments and irrelevant.
have fun...chris
I am attaching the other pages of the AES paper vol 48 #10, 2000 Oct.
You have page 3&4 already,page 1 is the cover sheet, 8 & 9 are acknowledgments and irrelevant.
have fun...chris
Attachments
The table lifted from the Jubilee paper is for half of the horn. Double all areas to sim the full horn in hornresp.
I admit I've never read it or many papers/docs posted, just respond to specific queries, so my $0.02 sometimes leaves a lot to be desired. Frankly, didn't know it was dual driver or would have had a better idea of where the problem lay since the driver/flare specs lined up nicely in one case.
GM
GM
Footnote: wiser persons than me will know how to reckon the room walls as part of the horn mouth for corner horns.
Also, the Klipsch bass horn has a somewhat ill-defined top plate. I made one rather larger than the bass horn profile... and put some cinder blocks and a wine rack on it.
Wine racks go very well with Klipshorns.
B.
Also, the Klipsch bass horn has a somewhat ill-defined top plate. I made one rather larger than the bass horn profile... and put some cinder blocks and a wine rack on it.
Wine racks go very well with Klipshorns.
B.
I once kilt one or both K33 in Khorn with a Belles "A" amp's nasty clipping on the Telarc 1812 finale seeing if it would wake a friend passed out from a bit too much drinking - he kept snoozing
When the Telarc version of the LP was released back in the 70's, I was told by one LP store owner that people were bringing their albums back to the store, claiming that there was something wrong with it! Their phono cartridge could not track the canon shots properly! Ouch.
Jim.
Hello Jim, here is a comparison of the K31 & EV EVM12L in the Jubilee. (also others)....chris
From:Better woofer for Jubilee? - Technical/Modifications - The Klipsch Audio Community
EV 12L in black, K 31 in grey.
From:Better woofer for Jubilee? - Technical/Modifications - The Klipsch Audio Community
EV 12L in black, K 31 in grey.
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