Hello freddi, I guess Jim gave up on his thread?
Your 81.4L Vb # is for a 34Hz annull ie - the round magnet K33E 80s+ specs
The 91.8L Vb is for a 30Hz annull ie - EV 15W
Do you know your Khorns (cts motor) Vb? sims are not like reality, not even ballpark, perhaps only night and day
...chris
Hello freddi, I guess Jim gave up on his thread?
Your 81.4L Vb # is for a 34Hz annull ie - the round magnet K33E 80s+ specs
The 91.8L Vb is for a 30Hz annull ie - EV 15W
Do you know your Khorns (cts motor) Vb? sims are not like reality, not even ballpark, perhaps only night and day
Hi Glyph,
Sorry I have been busy at work, so it has been hard to follow the thread lately.
I am still plugging away with background stuff, slow, but steady, and will hold off posting for a while.
I do try to keep up with the postings here though. Even had to cut back on David's Hornresp help file, which I really enjoy reading.
Jim.
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Hi GM,
Is your question directed towards me? And if so, which HR record are you referring to? Right now I have three of them. Two of them are for modeling drivers and basic horn shapes. The third one is for horns with high initial flare rates. This is the file that I have spent quite a bit of time on lately, since I am starting to understand the main reason for using a high initial flare.
The high initial flare rate is not really *better* than a pure exponential, but it *does* allow a horn with a lower design fc, albeit at a lower efficiency. Just another trade off in the design of corner horns.
The study so far seems to say that a pure exponential horn will have a design fc of 50 Hz, and one with a high initial flare will get more like 46 Hz. Exchange higher efficiency of the exponential for lower fc of the hybrid.
Jim.
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oh - I vaguely remember that catalog - more than a half a lifetime ago for me - in this thread I used Jim's hornresp input. Previously I've used a couple of hornresp inputs posted at the Klipsch Technical & Modifications forum. That's very interesting that ~ an "air suspension" type woofer was made by EV for PWK. What would be its moving mass, etc? Does it have advantages over the K33 CTS and Eminence spec ?
that Khorn model might be in this thread:
Analysis of Klipschorn and La Scala cabinets with several drivers - Page 2 - Technical/Modifications - The Klipsch Audio Community
I've seen others than the one below - my hornresp records are in 3 messed up pcs - just lost video output on one
https://community.klipsch.com/uploads/monthly_10_2013/post-22723-13819486168538.png
- in this thread I used Jim's hornresp input. Previously I've used a couple of hornresp inputs posted at the Klipsch Technical & Modifications forum. That's very interesting that ~ an "air suspension" type woofer was made by EV for PWK. What would be its moving mass, etc? Does it have advantages over the K33 CTS and Eminence spec ?that Khorn model might be in this thread:
Analysis of Klipschorn and La Scala cabinets with several drivers - Page 2 - Technical/Modifications - The Klipsch Audio Community
I've seen others than the one below - my hornresp records are in 3 messed up pcs - just lost video output on one
https://community.klipsch.com/uploads/monthly_10_2013/post-22723-13819486168538.png
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so sorry I missed that post (am on a 17" monitor 27" back) - that is low mass and should be good for a Karlson
Can those be rebuilt to original spec ? (I have alnico cloth surround SP12)
Hello freddi... As far as the EV 15WK - I use the EV EVM 15L, sounds better -
BL up from 12.5 to 20, and more obtainable. Do you think with its large magnet return it would fit?Attachments
I've seen pictures of the 15" Karlson with the large potted alnico motor - also, the 12" version fits the little Karlson 12. I have one EVM15L plus two SP15A whizzer speakers which had ~"6 ohm" coils and qes raised with a series two ohm resistor hidden under a frame spoke. Would you know if the SP15A which superficially looks like the EV15L/EVM15L, can work with a 15L cone kit? I hate to throw the SP15A out. Does EVL15 play well in the Khorn? (I ran 2220H and that was a mixed bag vs K33)
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The K33 variety woofers use the 3 x 13 filter, all others could use the wide open 6 x 13 filter. Actually from the equations I posted earlier in this thread, for the EV 15L the filter I use is 5.25 x 13 about 68 sq in. The throat is still 2 x 3 x13, or 78 sq in. This is why folks don't have much luck changing out the K33. The EV15L sounds great, although I do have a 20 cu ft subwoofer horn cabinet with a EV DL18MT woofer for the bottom.
OK about the recone kits I have 5 EV15L and 4 EV15B woofers, I have purchased kits and have reconed one of each myself. The kits were not OEM, but do work properly. So I just called the supplier and asked about a kit for the SP15A 2 1/2 coil 8 ohm sans wizzer, and EV15WK 2 1/2 in coil 4 ohm. He will call me back with possible availability and price. Sorry to walk over Jims thread...chris
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Its my fault to mess up this thread - I sure appreciate your help. It might be cheaper just to ditch the SP15A frames then find EV15L in good shape used. The motorboard should remove so the larger filter can be used - ? My Khorns IIRC are 1 bare plywood unit from ~1977 (one lost in a fire) and 2 - lumbercore/walnut veneer from 1981.
Be patient I have not heard back about the recones. Yes the motorboard comes out, but Klipsch also reduced the opening in the body in front of the motorboard. I might ask your goal? Per PWK, the floppy K33 has more bandwidth than any alternatives, but a tight high Bl driver will sound better, go louder and need a subwoofer. Consider the K44 driver in the TSCM and CP-1 pro, the K44E.
per DJK rip
" Klipsch Fanatic djk
Heritage Members
6342 posts
Posted June 29, 2011
I used a pair of Klipschorn bottoms with the K44 in a dance club with a 400W amp on them. Crossed at 100hz and driven hard into clipping on a regular basis for over 5 years without a problem."
As for the older Klipschorn with the removable motorboard. To enlarge the filter slot you need to figure out the filter slot size for your 15 in woofer then enlarge the motorboard and bass bin body to match, (between 39 and 78 sq inches).
Attached are my before and after filter slot modifications. I have left and right front Khorns, a center channel LaScala, and rear surround Belle Klipsch all modified to the same 5.25 x 13 (68 sq in) acoustic filter dimensions.
Attachments
Measurement error?
Hello Jim,
Great path analysis of the Klipschorn bass horn. I did a far simpler path length/area study of one of my Klipschorns a few years ago. Will have to dig it out for comparison.
I noticed that on the 2D drawing & Table that position 22 shows a height of 19.19" and a width of 8.19" for a total mouth area of 157.16 in.^2.
I think those numbers are in error. At position 22, my Klipschorn measures 12" x 38" for a mouth area of 456 in.^2.
Regards,
Lee
Hello Jim,
Great path analysis of the Klipschorn bass horn. I did a far simpler path length/area study of one of my Klipschorns a few years ago. Will have to dig it out for comparison.
I noticed that on the 2D drawing & Table that position 22 shows a height of 19.19" and a width of 8.19" for a total mouth area of 157.16 in.^2.
I think those numbers are in error. At position 22, my Klipschorn measures 12" x 38" for a mouth area of 456 in.^2.
Regards,
Lee
The OP states:
"The areas listed amount to ¼ of the total horn area (for sqin.)"
157.16 x 4 =628.64, still different than your measurement...
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