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Old 4th February 2010, 05:19 PM   #31
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Pjanda,
You,ve got email
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Been there, Heard that, Forgot what I was listening to!
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Old 4th February 2010, 05:38 PM   #32
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PM me some contact info for payment.
Assuming/whenever Keen meets the design requirements for the discount.

Have you been in touch with Freddi? I think he managed to blow his second
BetsyK. But then again, he's a madman with a knob. Anything coulda happen...
Wire come loose at the eyelet. He did mention "concert volume levels."

There's some pics on the Karlson forum. Whats that thing in the background
hes A/B-ing it against? A Klipshorn??? Go figure... His comments on BetsyK
were still massively favorable.

Last edited by kenpeter; 4th February 2010 at 06:03 PM.
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Old 4th February 2010, 06:57 PM   #33
freddi is offline freddi  United States
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I put the lead that fell out back in the eyelet - Qt ~0.5 and Fs around 59 like the other unit so it should play fine - if (?) I got a good solder joint - no new solder seemed to flow & basket a kinda tight space to work - 59Hz fs is a nice spot for first K12's tuning and puts the first two Z peaks ~equal in amplitude - having the 2nd peak higher can be crap - if those darn lead would stay in there I'd have some fun and almost bet it was playing louder than what some FR systems would allow - due to higher tuning and Karlson's whatever it does, the cone excursion was low for what it did. There was a bit of modulation distortion but not much compared to reflex and pipe where the cone is jumpin' - need to use bigger amp (maybe for real to get a bit of headroom)
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Old 4th February 2010, 07:05 PM   #34
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You might could squeeze three of those in triangle on a K15 baffle?
If I went to all that trouble, I probably want to tilt em slightly crossfire.
I'm talking nonsense, I'm prolly never gonna do that, but it would fit...

Last edited by kenpeter; 4th February 2010 at 07:07 PM.
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Old 4th February 2010, 07:10 PM   #35
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freddi,

do you have box plans for the karlson you've put the betsyk into?

d
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Old 4th February 2010, 07:30 PM   #36
pjanda1 is offline pjanda1  United States
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Freddi,

Any chance you could post some box plans or a drawing in new thread? I'd split this thread if I could figure out how (I'll look more later). This thread isn't really the right place for the Karson discussion. You must like it loud! Most of us are using 3ish watt amplifiers and getting all the SPL we need. It seems like your Karson is tuned fairly high. Have you thought about high passing them for more dynamic range? If you aren't getting much at 40hz anyway, you may as well not have the excursion.

But, this thread is about the sale! (Which might be about over! I think I've got several takers.)

Paul
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Old 4th February 2010, 08:09 PM   #37
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The Karlson plans are at the Karlson forum. Far as I know,
that was factory K12 based up on the "Karlsonette" plan?
Obviously, BetsyK required an adaptor plate to fit K12 hole.

But I've abused Delta12's in K15 before. I can attest that
this cabinet style loves smaller drivers. Or maybe its just
that most drivers are typically stuffed in undersized boxes?

Its a challenging design, but not as difficult as most horns.
You have to cut two edges at an angle, and two curves.
Three curves if you count the speaker hole as a curve...
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Old 4th February 2010, 11:47 PM   #38
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No offense taken, Tinnitus. It's true.

Kenpeter, if you pay now you might end up keeping the drivers, as I don't have any "newbie" ideas.

- keantoken
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Old 5th February 2010, 12:14 AM   #39
freddi is offline freddi  United States
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those Karlson 12 plans were in the enclosures thread - later Karlson used a slit vent and a canted port panel - - I like the old K12/Karlsonette - called that at the time as there were only two models as of fall 1954 - the eight inch model apparently came just a bit later.

re:high passing at 40Hz - I didn't get far enough to find out but the old-school 1960's spy-music stuff by "The Clee-Shay's" didn't present hardly any visible cone movement - I only had the power of a Monarchy SM70.. The lead fell out from mid-range vibrations - or whatever happens when power is applied and work done but very little movement occurs and perhaps a less than perfect solder joint to the eyelet. A large K with 18 will take 300 watt peaks on big drum and move less than an 1/8" total.

Karlsonette drawing by Greg B. from my crude sketch
http://img228.imageshack.us/img228/8...sonetteib7.png
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Old 5th February 2010, 12:21 AM   #40
pjanda1 is offline pjanda1  United States
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For goodness sake, start a Karlson thread! Freddi, you seem to have gotten an early bum pair. I think I've offered before, but do you want another pair? Let me know.

Paul
Wild Burro Audio Labs - DIY Full Range Speakers
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