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RE: Science Of The Karlson

Posted by freddyi (A) on March 29, 2016 at 10:43:01

In Reply to: Science Of The Karlson posted by Inmate51 on March 28, 2016 at 11:59:22:

go to Diyaudio - - there are three or more good Karlson threads with the main contributor xrk971. He created Akabak models based on:

1 -the original 1951 Karlson (K15) - around 300 lines of script - not sure if published. K15 scales reasonably well down to 0.55 scale. There are exampled of simulations in the Diyaudio thread "A Speaker That Kicks Butt in Large Spaces"

http://www.diyaudio.com/forums/full-range/237948-speaker-kicks-butt-large-spaces-3.html

2 - GregB's "Karlsonator" - an excellent hybrid design which seems to model and scale very well. That has been built in driver sizes from 2 inches to 12 inches. There are detailed plans for 12/8 and 6.5" sizes at GregB's StupidHifi tricks on his Google pages. There have been a number of foamcore cabinets built at Diyaudio.

here's a thread on a mini Karlsonator with dual Vifa TC9FD
http://www.diyaudio.com/forums/full-range/239338-mini-karlsonator-0-53x-dual-tc9fds.html

3 - xrk971's "XKi" based upon simplified bandpass modeling - I think he has published that Akabak script

there's also xrk971's "Kazba" which is a dipole K with the rear slot orientation inverted.

polars are improved - especially the small K's where it really affects the upper treble favorably -that work's well with drivers whose upper on-axis response is "hot"

check out the XKi thread. Karlson's original K's used a 2:1 ratio of rear to front chamber volume. As the XKi is often tuned lower, it works with a 3:1 chamber ratio.

Karlson Evangelist

• XKI   (Open in New Window)

Edits: 03/29/16 03/29/16 03/29/16

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