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Some years ago i build these pair of 200Hz Tracstrix horns
Now the bass cabs is about ready for play
Built thread (in Swedish)
Follow Ups:
I look forward to you letting us know how they sound. Your craftsmanship is clear and admirable. I suspect your design has great potential for playing beautiful music.
Thank you Don for your kind words
Brgds
Pix
Excellent Kount yourself in the Karlson Klan a Kindred spirit. Are those K15 and what drivers are you running in them? Best regards Moray James (Karlson kousin).
moray james
Dear cousin
Yes, they are K-15s accoring to the original drawings
The only deviation added is a small support between the middle shelf and the back hatch. And also adjustable bas-port doors.
I hade a pair of Beyma 15P80Fe that I will first try
Very high BL
Low Fs
Low-Mid Qts
Hig Vas
We will se what happends
The best to you dear klan-brother
/Pix
you may have seen this paper by a German fan of Karlson,
http://home.planet.nl/~ulfman/artic/kkoppler/kkopl_en.html
The Beyma is a monster but the Vas may haunt you hope it works for you, high density fiberglass will provide some increase in driver perceived volume but only of about 25%. Good luck and post results.
moray james
Moray,
The Vas parameter is a bit odd for me, and I Think I need some advice here. Is this value suposed to correspond to the internal box-volume for propper loading of the driver?
The Beyma 15P80Fe has a Vas of 159 litre but I am not sure how to calculate the K-15 volume, since the wings also loads the driver.
I think you are best to do a trial run and see what happens. If the cabinet is too small you will simply get reduced bass output so you can add damping to partially offset. You are not going to get much bass below 50Hz with a K15 so as I said this may not be an issue in the end. See what happens. Best regards Moray James.
moray james
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