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Has anyone heard or built an Axel Ridtahler (Ridtahler dipole) sub woofer?

http://jazzman-esl-page.blogspot.com/2011/01/ripole-subs-are-underway.html

I am also researching a Slot-loaded W-frame sub woofer design, has anyone here ever used this design or heard it?

I made an enquiry about using two 12" servo subs and the response was that they are tuned for really only one frequency.
I have heard they will produce a chamber resonance at 200hz-300hz, which is way above where I'd want to cut them off anyway.

I am chasing 20Hz to 35Hz fill in the bottom end with my stand mounts, the servo amp has tunability built in which aught to help integration.
rixthetrick

Showing 2 responses by danager

danager's avatar
danager
976 posts
 
Haven’t built it but I’ve seen a much smaller version and the owner said it was the best he’s ever heard.

Nelson Pass slot loaded open baffle project

https://www.firstwatt.com/pdf/art_slob.pdf

Another DIY option that has a fan following.

Decaware wicked one.

https://www.decware.com/newsite/wo32.htm

danager's avatar
danager
976 posts
 
Decware's Steve Deckert has some interesting concepts about sound reproduction and his articles and musings are very informative.
This past year has completely altered my perception about what I thought I knew about HIFI from power cords to amplifier power from subwoofers to horn speakers.  
What I thought to know to be true has been demonstrated to be absolutely false and because I was able to meet, hear and discuss stereo with knowledgeable people, I've benefited by a much better sounding stereo.

For me that bottom octave has been quite illusive and look forward to hearing about how you solved it.  




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