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The "Dutch" Karlson 12
The "Dutch" Karlson 12
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Old 12th October 2017, 06:32 PM   #11
freddi is offline freddi  United States
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The "Dutch" Karlson 12
A little K system with subwoofer would be a potent and reasonably compact setup. My K12 with Pyle PM1298 (about the same driver as Eminence's Kappa 12A), topped with a K-tube, has more "grab" than my Klipschorns. Add a decent sub to get the lower octaves, and there should be pretty good dynamics. A K12 with woofer like the Kappa should take 200 watt peaks on drum transients without exceeding 5mm peak to peak.

Its a lot of fun to see all these new K-variants in the DIY community: GregB's "Karlsonator", XRK971's double mini Karlsonators and XKi. Don't forget the original type either - they have their place ;^).

Last edited by freddi; 12th October 2017 at 06:35 PM.
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Old 23rd October 2017, 08:25 PM   #12
IG81 is online now IG81  Canada
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Originally Posted by Lohengrimas View Post
It is - I really should build a K12 for my AD12202's and see how that works out to add to the discussion, but I don't have the carpentry confidence to pull it off...
As far as the old-style Karlsons go, the AD12202 would likely be better used in a 15" format koupler, X15 at the very least, K15 probably better. The high Qt and Vas on most Philips drivers has them do better in larger boxes IMO. I had a pair of 9710 which did poorly in a modern SK8 (10" size koupler in reality) but relatively well in the old 12" format Karlsonette.
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Old 24th October 2017, 11:00 AM   #13
Lohengrimas is offline Lohengrimas  Netherlands
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Originally Posted by IG81 View Post
As far as the old-style Karlsons go, the AD12202 would likely be better used in a 15" format koupler, X15 at the very least, K15 probably better. The high Qt and Vas on most Philips drivers has them do better in larger boxes IMO. I had a pair of 9710 which did poorly in a modern SK8 (10" size koupler in reality) but relatively well in the old 12" format Karlsonette.
Yes, the Karlsonnette is traditional one for the 9710. I'll check out the K15!
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Old 24th October 2017, 01:36 PM   #14
IG81 is online now IG81  Canada
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I haven't been toying with audio stuff much in the last few years, having settled on my various setups and having other existing and new hobbies as well, but I'd probably have a hard time passing up a nice pair of AD12202 if I came across it. I've heard good things about this driver and I've liked my Philips 9710 and AD7060 so far.
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Old 25th October 2017, 07:55 PM   #15
freddi is offline freddi  United States
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The "Dutch" Karlson 12
The "Dutch" K12 seems to have elements of Karlson's first and second K12 versions. There's no attempt at a "reflector" (the "Dutch K12" have less response ripple than say trying to implement a curved panel in that space)

K12 PORT AREA - the Dutch model has close to 50% more port area than the 1954 K12/"Karlsonette", plus a taller speaker baffle. Karlson's 2nd K12 (which appeared in the July 1958 issue of Popular Mechanics) had 6 slit vents.

KARLSONETTE = 12.42 SQ. INCHES

DUTCH K12 = 18.26. SQ. INCHES

********************************

KARLSONETTE FRONT CHAMBER DEPTH = 6.375"

DUTCH K12 FRONT CHAMBER DEPTH = 5.75"

- KARLSONETTE FRONT CHAMBER ABOUT 5/8" DEEPER THAN THE DUTCH K12

The first K12 , with its rear shelf and movable bar, had a lot tighter lowpass gap than Karlson's 2nd K12 and the Dutch model.

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