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A Karlson ad sheet with an 18" driver coupler

75.109.224.112
Posted on August 10, 2012 at 21:48:59
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 it was a surprise to me to see amongst the regular lineup of Karlson enclosures, one designed for an 18" speaker. It turned the coupler on its side and featured a compartment to hold midrange and tweeter components for those who ran woofers - or the compartment could hold some amplifiers. Also there were adapters for 15" and 12" speaker

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Karlson Evangelist

 

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Happy as a Klam, posted on August 27, 2012 at 20:14:42
Don Bunce
Audiophile

Posts: 1380
Joined: April 10, 2002



Well,my day or two turned out to be a week or two,but I built a Klam 10. I used the drivers and crossover from one of my Adire HE10.1 speakers.Eminence Beta 10cx and I believe the commpression driver is a modified APT-50.

I screwed the box together using pocket joints and duct tape gaskets(no glue),so I can take it apart to make adjustments,like increasing back chamber size,and spacing of the wings.


I've been listening to it for a while now,still not quite sure of what to think. Is sounds good in some respects,but not so good in others.
The response is better than I expected it to be,but there is a large peak between 100-300 hz,which confirmed what I heard.The box vibrates a lot,adding it's own signature to the sound.Maybe some additional bracing would help.

The highs are clear,even without varnish on the inside,and while it doesn't go very deep,the bass has a good punch to it. I was surprised at how well it handled the Illegal Bass CD.

Anyway,I will continue to play around with it,and see what happens.Maybe I will take it outside and inflict it upon the neighbors to see what they think of it.

I finally got a new computer,so hopefully i will be able to post some better pics.

In the meantime,here is a crappy Ipod photo.

 

RE: Happy as a Klam, posted on August 28, 2012 at 05:45:37
IG
Audiophile

Posts: 130
Location: Québec
Joined: August 31, 2011
 Nice work!

Of course you can not expect too much bass from these as the back chamber is of rather small size. A strong motor driver will do well in the vocal range and probably OK down to ~100Hz.

IG

 

RE: Happy as a Klam, posted on August 28, 2012 at 00:37:39
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 KOOL !

how big is your back chamber

that's pretty much the same driver as I have in a klam10 but my builder screwed up the aperture and got it too tight screwing with the horizontal off axis. The back chamber on mine is just deep enough to take Beta10cx plus PSD2002.

although I have a paid Imageshack acct. they seem to increasingly lose a lot of my stuff - here's a screenshot of a little thumbnail enlarged of my klam 10 outdoors loaded with the old B102 to show where it bumps.

an extended stub K-tube jammed down the coax would probably be way cool but I'm not sure if I'd want to remove the dust screen.



they have to be rigid - Carl said his 3/4" panel box flexed a lot.

regular K are easier to be really hi-fi but I do think klam projector with coax would sound hifi and do some serious spl noise outdoors

imo a little regukar K is as good as a bigger horn - YMMV
Karlson Evangelist

 

RE: A Karlson ad sheet with an 18" driver coupler, posted on August 11, 2012 at 08:49:56
Kloss
 I have a pair of 12u.

 

RE: A Karlson ad sheet with an 18" driver coupler, posted on August 12, 2012 at 00:25:26
Don Bunce
Audiophile

Posts: 1380
Joined: April 10, 2002
 Hey Freddy,

The other day I was looking at the Klam info,and thinking I should build one to see how it sounds.Now you have inspired me to actually do it.

I wonder if two built back to back with one driver would work as a dipole?

I got the Omnimic,so now I will be able to actually make measurements.

BTW,the K tubes work best slanted down 15-20 deg with the slot facing up,rather than standing up like I had them at InDIYana,although they didn't sound bad that way.

Hopefully,I will have something to show in a day or two...

 

RE: A Karlson ad sheet with an 18" driver coupler, posted on August 12, 2012 at 07:49:13
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 hey back Don

dunno about one driver but a guy in Argentina took the Karlson-Oliver Phase III dimensions I posted and made a back to back klam with horns on top - said vocal quality was real good.



Karlson's X15 system tilted the tube down 12 degrees and had the slot "up" - - that's a great way to build a K-coupler.

are you gonna do some bass K-couplers? - I need to find someone to make some nice looking K's

X15 ad sheet

Karlson Evangelist

 

T/S Parameters ?, posted on August 12, 2012 at 14:04:26
djk
Manufacturer

Posts: 6135
Joined: June 17, 2000
 Which do you think would be better, horn type or direct radiator type?

I was thinking of trying a 12 suited for a mid horn, low Qts and high Fs, JBL 2202 or similar.

 

RE: T/S Parameters ?, posted on August 12, 2012 at 15:48:18
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 almost always the lowest moving mass with the strongest motor - the fullrange folks over at diyaudio think Beta 12LTA is a powerhouse - it does have pretty good midrange sensitivity in a Karlson 12 but kinda misses the transient snap of drivers with stronger motor.

since a speaker is buried deeper in the klam type than the Ultra Fidelity style, it may have more bounce artifacts than a regular Karlson coupler. Boosting the highs or running the coax HF a bit higher than normal will offset some of that stuff - its really not heard at some distance back. Karlson was probably right to say the front chambers needed several coats of varnish and in the 10" klam used a thin sheet of acrylic on the top plate. That seems to be a pretty good klam other than the particleboard flexing too much. Karlson's 15" klam AP100/Oliver Magna-Clam looked like it was somewhat scaled from the 10" model and was said to run an Altec 421 plus a K-tube tweeter - that one went into Radio City Music Hall.

I think it would be fun to cut the dust-screen out of an Eminence Beta series coax and mount a K-tube down into its horn exit - extend the tube so the tube's aperture merges with the main aperture - brace the 1" plastic pipe tube to the top plate with a small piece of plywood bored with a 1 1/4" bit.

the original 12" Karlson is a kicky little thing for its size and could run an internal K-tube to keep things compact and safe for club use. With a handle on top it could be easily carried. A top mounted K-tube would sound nice and blend well too.

my sample of the Oliver Phase III klam had a lapped cone 10" alnico magnet
guitar speaker - I think Eminence makes a guitar 10 with similar cone today. Phase III was vented and from what I understand, so was the 15" klam. From what I can tell, a sealed rear chamber may be better with sources with powerful drum transients. A little 8" klam makes a pretty big noise.


Karlson Evangelist

 

RE: A Karlson ad sheet with an 18" driver coupler, posted on August 11, 2012 at 11:34:05
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 which vent style in your K12?
Karlson Evangelist

 

RE: A Karlson ad sheet with an 18" driver coupler, posted on August 11, 2012 at 15:47:15
Kloss
 Owner mentioned buying one as a kit in late 1950s then another a few years later so they look the same but each vent is different I will someday;) Modify the vents so the match. Been wondering about K tubes thinking 3way 12in in K and a EV mid, eminence tweeter both with copper K tubes.

 

Klam ?, posted on August 11, 2012 at 01:49:06
djk
Manufacturer

Posts: 6135
Joined: June 17, 2000
 How horrible do you think a Klam with the 12" JBL 2202 might be?

Could you get it to work from 100hz~1Khz?

How big would you try for?

Just thinking.

 

RE: Klam ? Klam12 aperture, posted on August 13, 2012 at 10:46:35
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 hey DJK - found a note saying C's klam12 did well on drum and acoustic bass tracks with a P=1/Q=3 wing flare - - see if this routine will run on your system - hope the late Gregg Baker got it right. It won't run on 64bit Win7 - IIRC he did something to limit its flexibility. A P=1/Q=1.7 flare opens a bit faster in its second half of travel than a radial arc for the same starting gap, length, and final width. 1/3 is slower in expansion and of course smaller in total area. At one time before being compiled, spat out aperture area which might be useful for rough Helmholtz resonator guesstimate.

2-variable Wing Calculator
Karlson Evangelist

 

RE: Klam ?, posted on August 11, 2012 at 06:51:39
freddyi
Audiophile

Posts: 3852
Joined: December 6, 2001
 (with a coax and extended K-tube like Faerber I think one would work fullrange and the tube would then mask up close artifacts)

a klam10 would work pretty well in a little package and easy to manage

somewhere I have Carl's trax60 wing spec for this early try by him
you probably don't need/want that much rear chamber as its qtc could be set around 0.7->1.1

rough SIZE Klam12

one of Carl's klam12 - you could probably mount a K-tube and neo driver in there like with Karlson's AP100 and the Karlson-Oliver "Magna-Klam"

klam10 by Carl - had a long distance cutter do a couple but the opening came out more narrow than C's pix so the radius spec might be off. I'll load old spec Bets10x and crank up the compression driver and put them on tripods once I re-cut the aperture

Carl's Klam10 pix with old spec B102 - Eminence really killed that model's midrange and "treble" with the new spec

Rough Klam10 dims

The nice thing about an elevated klam is the even vertical dispersion - one could sit directly underneath one and hear highs (assuming coax)

Karlson-Oliver Phase3 projector - the top plate inside was covered
with a thin sheet of plexiglass

John Karlson and Jess Oliver debut the Oliver Sound "Clam" (for clam shaped pattern)

A regular K12 with a K-tube on top is real kicky for such a little package. Even a K10 a bit smaller will play loud and clear.

PYM1298 in K12 with a Transylvania "The Tube" on top. I might use a single vent like K15 instead of the distributive slit vent.


Karlson Evangelist

 

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