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.
128x128rixthetrick
Danager is cool, met him at millercarbon's place.

West Texas, Odessa. I work mostly out of Midland actually. Working out in the oil fields, amazing what I've seen in Texas and abroad. Horny toads, Bobcat, loads of Coyotes, White tails, Prarie dogs, Javelina ?(Mexican black pigs?), rattlers, loads of rabbits and jack rabbits, I think I even saw a Lama or something like it one dusty day. Squirrels, roadrunners, Tarantulas walking across the roads by the hundreds, wild donkey, picked up a good sized turtle walking down a lease road (I eventually put it back) and when I went to Wyoming I saw my first Bison, racoons, wild brown bears even.

I really love wildlife and have been around animals most of my life, used to catch snakes in Australia, that takes a bit of guts I tell you, perhaps foolishness. Not fond of blue bottles or jellyfish - you get stung and I bet the love of them wears thin real fast.

The real story of rix the trick. Nestle has a chocolate drink mixer called Quick. There was a TV advert with a jingle that went Quick's the trick, someone I can't recall who, changed it to Rick's the Trick after the jingle.
I liked it better than speedy, oh I was kinda slowing down the card game we were playing when I was a young fella, and the call went across the table, C'mon Speedy! Sarcasm is currency in Aus.
O, dessa....near Midland, home of the Chaparrals...*S*

Followed CanAm racing in my earlier years, the Jim Hall racing cars became the objects of concern to that others feared, perhaps the touchstone of that demi-spoiler on ones' car...

If GM was really serious about having a $erious $upercar to sell (not that the mid-engine Corvette will be a slouch, no), they would roll out a Chaparral....*sigh*

In the 'Ford vs. Ferrari' era, the only lack was the backing of $erious Backing from GM.  If another racing 'auto worship' movie is to be made, there is a good history to be revisited....imho...
To the point of a good friend, temporary employer, and car enthusiast in his way always swore he'd like to build 'one of his own...not to race, but merely to have.'
If he'd lived longer than he did, I'd wager John would have dumped his 230SL in a heartbeat for a DIY 2A~2C....

Go stare at the past, tap a fender for me...;) *S*

Pity one can't buy one, unlike a Ford GT....IF you can get on the list to get one of the latter....

But that's just car lust, and if given my druthers and the means, I'd be in a Lotus nearly anything...*L*

'asvjerry' is fairly obvious, with just a tweak on AVL to as(he)v(ille)...etc.
The 'gull' comes from LateNightTales, Fatboy Slim....

I was struck by the image of a gull in the dark...atypical, with a near-quizzical turn of the beak in the lighting....
...and far more of potential interest than one of me in the dark, either being not very awake or pissed at being so... *L* 

I'd suppose being a fish far from the sea at MC's Audio BBQ....

https://www.youtube.com/watch?v=Z4mbxaa3XL8

...but a random run-in at some audio extravaganza a more likely event, either of which is unlikely.

Perhaps in a later life...;)
@ danager - that Decware W032 looks interesting.
I heard some loaded horn speakers recently and they were very good.
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.  




For me that bottom octave has been quite illusive and look forward to hearing about how you solved it.
 Me, how I solved it, as in the past tense?
Yeah, I'm waiting to see how I solve it too.

:-) Sorry I hadn't cleaned my terminals before you heard what I have, it has changed for the better.