Trying to build dipole sub - a la Celestion 6000

http://gr-research.com/sw-12-16fr.aspx

http://www.aespeakers.com/

However, you may want to look for some form of equalization for the 6 dB rolloff, perhaps DSP. There's Digmoda that has built-in DSP on their plate amps but, of course, plate amps aren't all that convenient for dipoles.

Siegfried Linkwitz has written extensively on dipoles. Read his web site.

http://www.linkwitzlab.com/

Analog solutions to the dipole roll-off and sub-woofer cross-over are simple and are possible in passive line level form if you have enough gain in your preamp + amplifier.

Note SL's Phoenix prototypes page which has an H-frame with passive dipole equalization and LR2 cross-over to the main speakers.

http://www.linkwitzlab.com/proto.htm

Also note his active filter cookbook

http://www.linkwitzlab.com/filters.htm

Enjoy!

Should add that Madisound offers a service to precision cut the wood.

For this purpose, there are some pro amps that offer gain control, delay, crossovers and DSP along with gobs of advertised power for between $500 and $1000. Crown XTi series, Peavey, Powersoft, etc... Even saw that one had RCA's.

Wow,

Thanks a bunch for all the tips.

I was looking into direct drive woofers to deal with potential ringing problem of the drivers.

I have the behringer dcx2496 serving as the active cross over in my setup. So it can do some degree of DSP and filtering if need be.

I currently have more great amps than I should. I'm using my mccormack DNA 500 for bi-amp for my bass currently. I also have another pair of VTL 450MB and nuforce amp on standby as well. My primary amp is a pair of Ampzilla 2000 MKII driving my electrostats right now.

I probably will go with with a crown or peavey in the long run and sell the other amps if this sub arrangement works out.

I don't know if any of you has seen/heard the Celestion 6000 bass system. It is configure with the woofers firing directly into each other with only about 6 inch gap. Haven't figure out how all that works, but what comes out is clean tight bass that can really rock a room. My friend drives his system with just a old Krell 100 watt KSA amp; and that 100 W was more than enough totally roch his music room. Although the 100w krell can be deceiving as it can pump linear amount of juice as impedance goes down; all the way down to 1 ohm.

Does anyone know of a design for dipole sub where the woofers fire into each other like the celestion?