Karlson tube behind an OB

el`Ol · 04:30 PM

Ping Freddi!

Have you ever placed a Karlson tube (like the ones I have seen on compression drivers, just with 12" sewer pipes) behind an OB? I just put a pipe ~120° open in the direction of the driver behind a U-frame OB and I like the sound. Not measured yet and surely far from perfect, but voices with more substance, but not boxy (not BBC style), a bit open, but not too much. If one likes it more dipoly one can place a tube behind a flat OB.

What do you think?

PeteMcK · 16th May 2011, 01:24 AM

IIRC the Forsman speakers from Norway do something like this

15th May 2011, 04:23 PM	#1
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	Karlson tube behind an OB Ping Freddi! Have you ever placed a Karlson tube (like the ones I have seen on compression drivers, just with 12" sewer pipes) behind an OB? I just put a pipe ~120° open in the direction of the driver behind a U-frame OB and I like the sound. Not measured yet and surely far from perfect, but voices with more substance, but not boxy (not BBC style), a bit open, but not too much. If one likes it more dipoly one can place a tube behind a flat OB. What do you think? Last edited by el`Ol; 15th May 2011 at 04:30 PM.

16th May 2011, 01:24 AM	#2
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Sydney	IIRC the Forsman speakers from Norway do something like this __________________ ‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky

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