here's the cabinet in question, This was from a kit and with a single 10 degree forwards cant vent board. I'd like to have this plan for the "heritage" part of an upcoming Karlson compendium thread.
I do have a sketch of one K8 from Scott Nixon but that one doesn't match my cabinet so perhaps was a knockoff (? - the late Wayne Green said there were a number of "factories" producing Karlson cabinets in their heyday)
Karlson 8 cabinet from ~1955 with Tangband 1772 - YouTube
I do have a sketch of one K8 from Scott Nixon but that one doesn't match my cabinet so perhaps was a knockoff (? - the late Wayne Green said there were a number of "factories" producing Karlson cabinets in their heyday)
Karlson 8 cabinet from ~1955 with Tangband 1772 - YouTube
When did you post it? I can look at my screen shots and see if I have yours . I know I have saved a few from the many post I’ve seen on the forums
its been a few years back - it didn't seem to be at Imgur when I scoured 3400 uploads looking for something else.
here's the drawing I got from Scott nearly forty years ago. My kit K8 had its baffle extend up a bit from the intercept with its port
FOUND IT in the archive of the late Gregg Baker's Karlson forum.
Kool thing for 1955. (The Karlson Twelve aka ?K12" and "Karlsonette" was introduced in the fall of 1954)
Kool thing for 1955. (The Karlson Twelve aka ?K12" and "Karlsonette" was introduced in the fall of 1954)
This 12" Karlson on ebay appears to be a K-15 from the original plan with a 12" cutout.
VINTAGE 1950's KARLSON speaker plywood enclosure cabinet for 12'' driver | eBay
VINTAGE 1950's KARLSON speaker plywood enclosure cabinet for 12'' driver | eBay
freddi;6338667 said:
??? I remember he/you took over the original 'FR' forum, but don't recall a separate K forum.
Finally found your original K site: The Karlson Homepage
GM
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hi EddieT - -that's a homemade K15.
Hey GM - I was a late comer to Job Ulfman's Karlson forum so missed out on Alan Weiss's story of "the mob's" sabotage of his K speakers, (A 3 way IIRC with direct radiator woofer and metal -"klam" lens for compression driver - but in one Diyaudio thread we find a bass cabinet sans "wings",,,)
The late Leander Adams was one of the Karlson faithful - we argued but eventually made up.
Greg Bianchini may have been there before myself. His "Karlsonator" has become the most successful K type to date here thanks to XRK971's Akabak modeling of many drivers just for the asking.
Al Steman and Leander were already posting so I was, as Lee said "A Johnny Come Lately".
Moray James was a good member and still a supporter.
Lars Mosholm attempted an analysis of the little "Rocket" klam 8 sold by Alan Weiss.
Walt de Jong used K15 in PA work loaded with relatively low mms 18". He then made a larger "K18" (IIRC tuned. pretty low) which was a disappointment. (K don't grow like a horn 🙂_. Walt later did "The Punisher" and "Xtro" horn cabinets.
The "Dutch K12" was better known at that forum than Karlson's original K12. (despite the perpendicular distributed slot array port panel, I suspect it may make smoother measurements than some of the originals - ?)
Carl Neuser was there and a great K guy.
Here's input Z for this early K8. I think Karlson also recommended sealing vents on K8 and K12 with some drivers
Art Welter's Dad's "K8" was roughly scaled from a Karlson Twelve (as published in the July 1958 issue of Popular Mechanics. Its distributed slot vent area is pretty large compared to K8 or slit vent K12. It is quite smooth.
Both cabinets had a Beta8cx. The factory K8 probably the lowpass from Eminence's 3K5 xover board - so guessing 1.1mH/10uF.
- -no lowpass on the unit in the Welter K8. Welter's K8 makes a nice graph with Visaton's BG20.
Why does Karlson's K8 make those two prominent response dips?
Probably a BG20 (violet trace) in this un- labeled comparison. The "hacked port" K12 (green trace) was a "Karlsonette" style cabinet with its horizontal port blocked, then a K15 position vent cut into its upper board, its driver a PYM1298 (~ like Kappa`1A). I don't know what was in the high aspect 8 inch cabinet but putting a round port at the top gave some serious issues.
Welter K8
Hey GM - I was a late comer to Job Ulfman's Karlson forum so missed out on Alan Weiss's story of "the mob's" sabotage of his K speakers, (A 3 way IIRC with direct radiator woofer and metal -"klam" lens for compression driver - but in one Diyaudio thread we find a bass cabinet sans "wings",,,)
The late Leander Adams was one of the Karlson faithful - we argued but eventually made up.
Greg Bianchini may have been there before myself. His "Karlsonator" has become the most successful K type to date here thanks to XRK971's Akabak modeling of many drivers just for the asking.
Al Steman and Leander were already posting so I was, as Lee said "A Johnny Come Lately".
Moray James was a good member and still a supporter.
Lars Mosholm attempted an analysis of the little "Rocket" klam 8 sold by Alan Weiss.
Walt de Jong used K15 in PA work loaded with relatively low mms 18". He then made a larger "K18" (IIRC tuned. pretty low) which was a disappointment. (K don't grow like a horn 🙂_. Walt later did "The Punisher" and "Xtro" horn cabinets.
The "Dutch K12" was better known at that forum than Karlson's original K12. (despite the perpendicular distributed slot array port panel, I suspect it may make smoother measurements than some of the originals - ?)
Carl Neuser was there and a great K guy.
Here's input Z for this early K8. I think Karlson also recommended sealing vents on K8 and K12 with some drivers
Art Welter's Dad's "K8" was roughly scaled from a Karlson Twelve (as published in the July 1958 issue of Popular Mechanics. Its distributed slot vent area is pretty large compared to K8 or slit vent K12. It is quite smooth.
Both cabinets had a Beta8cx. The factory K8 probably the lowpass from Eminence's 3K5 xover board - so guessing 1.1mH/10uF.
- -no lowpass on the unit in the Welter K8. Welter's K8 makes a nice graph with Visaton's BG20.
Why does Karlson's K8 make those two prominent response dips?
Probably a BG20 (violet trace) in this un- labeled comparison. The "hacked port" K12 (green trace) was a "Karlsonette" style cabinet with its horizontal port blocked, then a K15 position vent cut into its upper board, its driver a PYM1298 (~ like Kappa`1A). I don't know what was in the high aspect 8 inch cabinet but putting a round port at the top gave some serious issues.
Welter K8
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Just stumbled across this older thread, and was curious what folks think about trying the Karlson 8" as shown in the above plans for a Celestion Eight 15 guitar speaker- I'm assuming this speaker has higher Qts as I can't find any published specs really, and it is generally used in open-backed cabinets.
https://celestion.com/product/eight-15/
I'm curious to see how it works as a guitar cab. I'm hoping for nice dispersion for a practice setup or recording.
https://celestion.com/product/eight-15/
I'm curious to see how it works as a guitar cab. I'm hoping for nice dispersion for a practice setup or recording.
it may work - dunno if would peak on bottom (100-120?) ? - honk ? - I did like Cannabis Rex in K12 and EVM15L in the Acoustic Control 115BK for guitar. I aslo ran Commonwealth 12 in a K12 but not with guitar.
½”
Freddie, ao far it looks like th einfo is inconsistent. 10°, 18° does not line up with the specified spot for the top end of the lower slanted bit..
dave
Freddie, ao far it looks like th einfo is inconsistent. 10°, 18° does not line up with the specified spot for the top end of the lower slanted bit..
dave
I need to make a pair of these Karlson cabinets, I've been wanting to for years... I have a pair of Eminence 820H that would be a great fit, I think. They sound really nice in a high tuned ported enclosure running full range.