Time for a new enclosure - Passive Radiators Maybe???

[MY99 2.5GT]

Please help me design a passive radiator enclosure for my 2 Cerwin Vega VMAX15.2 drivers. Power is coming from a pair of BASH 500 plate amps and signal will be optimized by Audyssey in a receiver or separates yet to be purchased.

I'm not fond of sealed boxes but last time I attempted to spec a ported box for these TLS Guy pointed out a few critical downfalls of a vented enclosure for these drivers.

With all this in mind I'm considering a compromise Passive radiators. I've attempted to model an enclosure with passive radiators in WinISD but am having trouble. Anyone out there have knowledge and experience designing passive radiator enclosures? Would my drivers even work well in this type of enclosure? I have a fairly large room so a single enclosure with both drivers and radiators is possible even if the volume reaches the 10 cu ft + neighborhood. Although I think 2 separate enclosures would fit the room a little better.

Here are the driver parameters (Thanks for the help!!):
Name: VMAX 15.2
2 coils
Nominal Impedance: 2 ohms
Sensitivity (2.8V@1m): 87.3dB
Power Handling RMS: 600 watts
Voice Coil Dia: 2 1/2"
Mounting Dia: 14 3/32"
Mounting Depth: 7 1/8"
Spkr. Displacement: .22 cu. ft.
Fs: 22.6Hz
Qts: .47
Qms: 4
Qes: .53
Vas: 2.9 ft3
Xmax: +/- .8"
Revc: 1.32 ohms

 

[j_garcia]

I think a PR design is a good midpoint between sealed and vented, but I also feel it is a bit tougher to design. What is the goal for the sub? Do you want clean sound or extension? PR won't give you as much extension as a vented sub, but will sound cleaner doing it IMO. If these subs are intended to work in a sealed config, then I don't see why they would have a problem with a PR design. Other questions: both in one volume and using one PR? Or two separate subs/divided enclosure each with their own PR?

Why is sealed less desirable? Yes you give up some extension and a bit of output with it, but I generally prefer the sound of sealed subs. With a dual driver config, your output should still be good. Something along the lines of this Rythmik:

 

[MY99 2.5GT]

I had a chance to hear a demo of the Def Tech Supercube Trinity:

SuperCube Trinity | Definitive Technology®

I don't have the $3000 MSRP but I think my Cerwin Vega's in a multi PR box would be pretty impressive at the right power levels. That trinity was so smooth and impressive that Ive been thinking about it ever since. I loved how authoritative it was at deep deep levels. It was tight and accurate with just a hint of boom when listening to certain types of music.

Call this my trinity clone

Any help designing the enclosure as well as PR recommendations would be much appreciated!!