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Old 18th July 2013, 12:40 AM   #1
Greg B is offline Greg B  United States
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Default Karlsonator

Since there's been a bit of interest in these things lately, I went and corrected a couple of small errors in the drawings, and updated the names. Just forget the old joke names, those were never intended beyond an audience of about 3-4 people... I plan to delete the old drawings to avoid confusion. They were basically draft versions anyway. This may screw up some links in the other threads.

Anyway, here are the links to the plans. They can be downloaded under 'More' on the menu.

Karlsonator "6"

Karlsonator "8"

Karlsonator
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Old 18th July 2013, 02:30 PM   #2
IG81 is offline IG81  Canada
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Thanks for the update. You shall be missed Super-$%&*.

IG
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Old 18th July 2013, 03:07 PM   #3
Greg B is offline Greg B  United States
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Yes, only the lucky few have seen the rare and elusive Super-$%&*.
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Old 18th July 2013, 03:20 PM   #4
IG81 is offline IG81  Canada
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It's kind of obvious and too easy at time to make fun of Karlsons in this manner. I've had a poster refer to various K-devices as Georgia O'Keefe-esque...

IG
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Old 18th July 2013, 04:44 PM   #5
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Would the Karlsonator or karlsonator-8 be a better fit for the Tang-Band w8-1772?

Tang Band W8-1772 8" Neodymium Full Range Driver 264-893

Thanks for the help.
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Old 18th July 2013, 09:03 PM   #6
xrk971 is offline xrk971  United States
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Default W8-1772 in 12 in Karlsonator

I have seen many photos of Freddi using W8-1772 in a K15 or K12. I will run a sim of it in a Karlsonator and we will see. My guess is that it will work very well. I will post later.
X

Edit:
Here is the simulation. First plot is freq response in stock 12 in Karlsonator (full size, smaller did not work as well). It has a nice flat bass shelf and great SPL, but the higher bass and mids are a bit bright. Second plot, I boosted the vent by 2X scale to increase the bass output to balance it out but still not enough. It can work with a BSC or EQ'ing I think. Third plot and fourth plot are impedance and cone displacement, respectively.
Attached Images
File Type: png Karlsonator-W8-1772-Freq-1m-1X-vent.png (34.9 KB, 1142 views)
File Type: png Karlsonator-W8-1772-Freq-1m-2X-vent.png (23.6 KB, 1127 views)
File Type: png Karlsonator-W8-1772-Impedance-1m-2X-vent.png (28.0 KB, 1128 views)
File Type: png Karlsonator-W8-1772-Displ-1m-2X-vent.png (27.0 KB, 1118 views)

Last edited by xrk971; 18th July 2013 at 09:22 PM.
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Old 19th July 2013, 12:47 AM   #7
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Thanks for the sim and info, that was quick. I have them currently in a Bob Brines TL with a line level bsc so that doesn't concern me.

Can you explain what you mean by boosting the vent? Is that the space between the top of the fold and the top of the speaker? Also, if using a bsc which would work better? Is the vent something I can experiment with, or would that take a seperate build?

Thanks again
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Old 19th July 2013, 12:52 AM   #8
xrk971 is offline xrk971  United States
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Vanofmonks,
You are welcome. The vent is the narrow top constriction leading to the front chamber. The easiest way to make that bigger is to slightly reduce the length if the closed end of the TL top. An inch or two won't be that noticeable and it will expand the vent gap. You can then fine tune the gap by adding strips of plywood or whatever to reduce the cross sectional area. Line level bsc is best if you have it already. Good luck.
X
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Old 19th July 2013, 12:40 PM   #9
IG81 is offline IG81  Canada
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I don't think an actual Karlsonator with W8-1772 would be that strong in the midrange/HF. The nice mid-90ies bass shelf and aperture should balance things out more even IMO.

IG
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Old 19th July 2013, 01:42 PM   #10
xrk971 is offline xrk971  United States
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IG,
I was wondering about that too - maybe one of the T/S params I entered is off?
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