Its a reflex vent. With the front of the driver being mass loaded by the front chamber its working like a parallel tuned bandpass.
Karlson's originals were series vented - KR5 (Rocket), APX/Oliver Phase III, AP100 15" woofer and K-tube. There is a plan for a 12 foot klam with IB containment of the back wave. Carl has talked about something he calls a bandpass beater - a klam with two drivers and series venting. Carl's kid made a 10" passive radiator K-sub many years ago.
the little Klam in the middle was the subwoofer - had 2-10" in isobarik plus a diy passive radiator
the little Klam in the middle was the subwoofer - had 2-10" in isobarik plus a diy passive radiator
An externally hosted image should be here but it was not working when we last tested it.
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hey doc - have you put your klam up high yet? - a lot of times they were mounted to the ceiling. - just don't drop it! (I had one drop off a porch rail)
I think a pair of the 10" klams were used for Karlson's stereo feeding for a crowd of 5000 people
I think a pair of the 10" klams were used for Karlson's stereo feeding for a crowd of 5000 people
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I had my Kompact Klams with the smaller front chamber high on shelves in my bedroom sounded pretty good with some eq.
Probably bounce off the ceiling and achieve similar dispersion
to Oliver's klam mounted on a spear under the clear blue sky.
to Oliver's klam mounted on a spear under the clear blue sky.
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Cool little Klam! I sketched a similar parallel vent earlier this week, as well as a shorter one that runs on the other side of the Klam.
IG
IG
The vent csa seems awfully large for a 3 in driver. What driver are you using, what is the chamber volume, and what did you tune the vent for in frequency? Thanks.
Its a Tang Band w3-315 and the rear chamber is 3 liters. Right now the vent is tuned to 125 Hz but I plan on narrowing the vent to lower its tuning.
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Does rounding the slot matter at the top? I mean, where its deeper than narrow.
Are we seeing a rounded T-Molding in the Oliver's advertising flyer?
I would usually widen the top of the slot to taste, but maybe I am correcting for
this minor problem of geometry in the wrong way?
Are we seeing a rounded T-Molding in the Oliver's advertising flyer?
I would usually widen the top of the slot to taste, but maybe I am correcting for
this minor problem of geometry in the wrong way?
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its a steel U molding and seems to stiffen/damp the aperture - this is a good klam but should be made of 3/4" plywood - It has a heavy alnico magnet 10" lapped cone guitar speaker
An externally hosted image should be here but it was not working when we last tested it.
Its an Audax mylar dome tweeter. Smooth sounding tweeters but the K tubes make a big improvement in how they disperse sound. Sounds great paired with my Klams.
have you tried?
Thedoc: I run my K-Tubes at ear level parallel to the floor aimed directly at the listening position so you are looking straight down the tube and the slots fire facing each other so that the back solid side of the tube is facing the outside wall. If you try this let me know what you think abut the stage and image. Best regards Moray James.
Thedoc: I run my K-Tubes at ear level parallel to the floor aimed directly at the listening position so you are looking straight down the tube and the slots fire facing each other so that the back solid side of the tube is facing the outside wall. If you try this let me know what you think abut the stage and image. Best regards Moray James.
that's an interesting orientation of the K-tube's slot. For fullrange helper tweeters, I wonder how short a tube can be made and effective? - did you ever see the mini-klam tweeter lens made by Alan Weiss? - it could be something for comparisons.
Alan Weiss klam-lens for Eminence compression driver - it was used in a two-way 8" satellite and a 3-way theater speaker
here's mine in paper
Alan Weiss klam-lens for Eminence compression driver - it was used in a two-way 8" satellite and a 3-way theater speaker
An externally hosted image should be here but it was not working when we last tested it.
here's mine in paper
An externally hosted image should be here but it was not working when we last tested it.
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Does photo show orientation?
The photo shows the tube tilted up. Did you run it like this? I have my tubes centred at ear level they are parallel to the floor. The tubes are at the corners of an equilateral triangle that from the listening position you are looking straight down the barrel of the tube. the orientation of the slot is like you have them in your photo they are cross firing. This is it best configuration I have found so far.
best regards Moray James.
The photo shows the tube tilted up. Did you run it like this? I have my tubes centred at ear level they are parallel to the floor. The tubes are at the corners of an equilateral triangle that from the listening position you are looking straight down the barrel of the tube. the orientation of the slot is like you have them in your photo they are cross firing. This is it best configuration I have found so far.
best regards Moray James.
Karlson vs dual chamber reflex
I wonder how a Karlson would stack up against a dual chamber reflex which also offers a higher frequency bass boost.
I wonder how a Karlson would stack up against a dual chamber reflex which also offers a higher frequency bass boost.
I was going down this path and built a model of a Karlson vs a DCR with the same driver and tuned for the same freq. The Karlson is unique and very different in behavior and has an efficiency and ability to throw a flat bass shelf (60 Hz to 150 Hz) very far. It can't reach below 60 Hz but the bass it has is much more efficient that what a DCR has, which sends it bass through two relatively small ports compared to the very large K-aperture.