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

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.

*L*  Frankly, I'd ripole 1st vs. the Decware....

Way far easier to fab.... ;)

"Piano finish Black" can hide all sorts of 'oops'....*G*

...not that I've any insolent insider info, y'know....;)

...an irrational thought just seized.....?

A 'sub-swarm' of riploles armed with 8" (or smaller) woofers....

No more 'one box to bounce them...', but cables like a web to trip the unwary or unstable...*L* )

@oldhvymec - are you saying that the measurements the amp module are fed coming back from the subs are inaccurate?

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I'm saying you need to be aware of how the system works AND work with it. Depending on the size of the room it can take a few 12" drivers to really impact a room. I say impact because of the way they load the room and also how the room is vented..  IB rooms vs OB with OB subs. Sometimes it's better to mix more than one type of bass unit. Depending on the music or the effect you want.. HT for an example.

I use both, Band pass bass columns and servo controlled subs. 60hz <

The Band pass cabinets are direct coupled to the amp. No XO in the way.. Great cone control. That is a great option for ME..

Ripole are kinda'  strange the way they load a room too.

I saw 3 on either side of the seated position in a warehouse environment.. WOW.. all 12" I think. All Mac gear too.

A GREAT accelerometer and amp system is the best.. BUT the cost.

 With today's DSP, and or Active crossovers with all the goodies for bass management and BIG class D amps.  I say have fun... I sure am..:-)

Regards