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Old 30th May 2011, 12:49 PM   #21
jbell is offline jbell  United States
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A well designed tapped horn has directivity -- how much exactly are you looking for? Lilmike has a 25hz TH designed for the 6.5 anarchy driver...

Click the image to open in full size.
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Old 30th May 2011, 01:56 PM   #22
60ndown is offline 60ndown  United States
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ive never tried a karlson, and after reading this i really want to.....

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Originally Posted by kenpeter View Post
Find you the 1955 Radio Electronics "Karlson K15" plan.
Its intended as a full range, but excels at midbass.
Front chamber will throw huge volumes of air.
Reaches down plenty low enough for Rock...

I play bass guitar in Drop D, and this is what I use.
Its also great for drums, and will replicate kickdrum
like no other single cabinet of its size...

Claims wide dispersion, true enough for midrange if that matters.
But midbase kick is a floor hugging vortex thats quite directional.
Aim directly at the audience for optimal loading, this one defies
the usual logic. Does not load better facing into a wall or corner.

Plans here: 1954 Ultra Fidelity plan will do, same thing basically...
Karlson Plans
Its also qualifies as a one sheet wonder (Cut from a single 4x8).
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Old 30th May 2011, 11:52 PM   #23
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karlsons have a unique sound, easy enough to build, and they are tunable to an extent.

I'd be curious to know what you think about how they sound after the build. i find they work better in smaller spaces (under 5m^2)
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Old 31st May 2011, 12:47 AM   #24
60ndown is offline 60ndown  United States
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mine are going to be my own *special* version.

using (4) 6" cheap subwoofers, and some 'bookshelf' speakers removed from their boxes and installed in the Karlson.

all via 1 of these.

DIAMOND 2 WAY STEREO PASSIVE SUBWOOFER CROSSOVER S @NEW - eBay (item 390285608760 end time Jun-01-11 11:34:52 PDT)

its just a fun project for me,

hopefully ill end up with a single speaker that has a great sound for a particular application,

i have no idea what that application is yet? ..........
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Old 31st May 2011, 04:52 AM   #25
thejohn is offline thejohn  South Africa
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M3D-Sub : Directional Subwoofer

Not so good for a small room though...
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Old 31st May 2011, 07:46 AM   #26
Zero D is offline Zero D  United Kingdom
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Default M3D

@ thejohn

Yeah, another take on the idea.

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Not so good for a small room though...
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Old 31st May 2011, 04:42 PM   #27
freddi is offline freddi  United States
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moving mass is usually light, strong motor - here's a one sheet 32" tall coupler loaded with 103g mms 0.25 qts 18" Eminence woofer - an internal K-tube might be fun for some modern electric bass setups
Click the image to open in full size.

Last edited by freddi; 31st May 2011 at 04:45 PM.
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Old 1st June 2011, 03:56 AM   #28
60ndown is offline 60ndown  United States
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Default I'm looking for some creativity and imagination (for a sub)

i picked up an older powered sub today, its a ported 8" Onkyo, 70 watts, no x-over, just gain ?? !!

box is about 2 cubes and the port is about 4" wide and 6" long.

Onkyo SKW-100 Subwoofers Reviews


id like to build a much better box for it, using the same amplifier and driver.

and see how good it can be made to sound as an HT sub. low/medium volume only, only needs to get down to 30hz ( i dont care to much about the odd movie 20 and 16 hz material)

ive never built a T-line, is it as simple as a looooooooong box with the taper expanding evenly, and the flare opening behind the driver? (cant be that simple right, there has to be some math involved to make the front and rear wave match?

or just a small sealed box ?


anyone feeling creative/inspired?


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Old 1st June 2011, 04:44 AM   #29
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What are the t/s parameters of the driver?
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Old 1st June 2011, 05:07 AM   #30
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+1 on T/S. Time to get the kit together impedance measure kit. Before i got Fuzzmeasure i used the reciepe on Brian's diysubwoofers.org site.

dave
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