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Karlson for subs? maybe they sound good.
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I'm waiting for the Seismic Jrs that Bruce Edgar will be sending me soon but I heard the exemplar Karlsons at VSAC and all I can say is I have to build me myself a pair of those. Hopefully my Seismic Jrs will be up to the task but all I can tell you is that if I had not already ordered those I would buy a pair of 515Bs and try a pair of modified Karlsons. John Tucker's was among the best in VSAC. If he had had a tape source such as Doc's I suspect I would have liked his room the best.
xcortes,
can you please let me know what you think of Seismic Jrs once you receive them (compared to Exemplar Karlson Subs).
I have pair of Seismic Jrs with my Exemplar horns and I like them a lot. Once you set them up right they sound very good. I had them on sand boxes and positioned next to the Exemplars. But I haven't heard Exemplar Karlsons... so I don't know how good they are...
regards
Goran
hard for me to believe that those karlsons go down to 20hz...anyone have experience with them that can confirm this is possible? that looks like a nice horn loaded system, woudl love to hear it! Tony
Jean-Francois Lessard 2A3 PP amp
Marantz 7T Preamp
Klipschorns w/ALK xovers
Sony CX350&CX-230 cd changers
MSB link DACIII w24/96k
MSB digital director
Luxman PD-272 TT
Technics M85 Cassette
they will but remember eXemplar's tuning may be around 25Hz, and some boost is applied centered at tuning. Normal K15 have their Z dip around 48 Hz but the nearfield cone null can appear 1/2 octave lower.I've kludged their sub some years back with Altec 416 and an EV Interface eq box - it sounded much better than some TL and better than a 6th order reflex box loaded with 15" Eminence-Dayton Theres no magic in the LF numbers so Iron law still applies.
Freddyi, what's the upper good sound limit on a 15" Karlson?
haha - depends upon your perspective and whether its "reverberation" at the time is deemed pleasurable or not. 20Khz? Highs in K15 with coaxial can sound very sweet
one would just have to hear it as is with coaxial and compare to various type horn/waveeguide and karlson tube on top. For examination, a K-tube can be made out of schedule 40 pvc pipe so the device is ~5.3-5.5" long with a half-ellipse slot so an ellipse with major axis 10.6"-11" and minor axis (pi* pipe's outside diameter)- 1/8" gap at start would make one. --crossover with a little K-tube could be 1600Hz. A one inch k-tube would normally be elevated ~30 degrees above horizontal.
Steve Schell likes conical midnorn on top of K15 - maybe ask him whats a good diy midhorn approach.
I was really just wondering if they're usable up to the 300 to 400Hz area.
I had a pair of 12" Karlsons about 8 or so years ago but they had university mustangs in them and the sound was a bit mushy. I had no other 12's to try them out with so I got rid of them.
thanks freddyi, I can understand why these could be a good mate, sound-wise, with the other components in that exemplar horn speaker, I was just surprised by the claim of 20hz lower extension. 35hz-45hz might be more like it I thought...tony
Jean-Francois Lessard 2A3 PP amp
Marantz 7T Preamp
Klipschorns w/ALK xovers
Sony CX350&CX-230 cd changers
MSB link DACIII w24/96k
MSB digital director
Luxman PD-272 TT
Technics M85 Cassette
Just my few cents, ...Biggest problem with K is that they are not fashionable with Hi-Fi Gurus. Part of the reason maybe is that there is no easily understandable math to match a driver to cabinet or vice - versa.
Second biggest problem is their size. Maybe small compared to a bass horn, but still considerably larger than the average hi-fi enclosure. Also, a K won't want to go really low, unless re-tuned and maybe with the help of bass boost. Of course, the low cone motion helps it to accept a fair bit of boost.
Third problem is not every driver works in this enclosure. As a result, folks have to rely on anecdotal experience to find a suitable driver. Note that suitable 15" drivers aren't always cheap.
They have their own "character" to the sound, but that is not to say they cant be enjoyed, when properly applied. Should have some potential as a bass or mid bass cabinet, or as a 2-way. The coaxial karlson has a "unique" sound, but nice dispersion
Fourth problem. A K-tube looks obscene :)
Folks who fret about flat frequency response, enclosure size etc should stick to multi- way monitors :) . Karlsons won't solve world hunger but they might just have a place under the Sun.
I'm asking because they DO use Altec drivers crossed over at 750 Hz.
They used the 902 a few years in the Sound Practices article. That driver is still available as the GPA 902, nice driver, I use them.The horn was Exemplar's own, a tractrix as I recall.
nt
You sure? This article says 902:
GM
Loud is Beautiful if it's Clean!
John's been using the 909 for years. That's a very old article.
In my pair of Exemplar Horns compression drivers are Altec 909.
Check the copy of the article below
Thanks! I didn't know that the internet article was condensed beyond missing the pics, etc..
GM
Loud is Beautiful if it's Clean!
Freddyi,
When I talked to John a couple of years back, he said that he hadn't found anything else that could keep up with his horns. He has them lo-passed at 50Hz for their role as subs and I believe he said that they extended down to 20Hz. I listened to the Exemplar/Karlsons for awhile and
was very impressed with the whole set-up.
BTW: John Tucker told me that this is the last show for the Exemplars, as he can't find anyone good enough or maybe willing enough to build the cabinets. Too bad, as they were (again!) one of the best speakers at VSAC.
Best Regards,
TerryO
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