[Eeyore]

Arny Krueger wrote:

"Eeyore" wrote
Bill Riel wrote:
DW wrote:

If so, what are your impressions? Could this be a revelation in the
high-end audio industry?

It's a fan !

Heh, sure looks like one.

From the description I'm not so sure that this is something I'd want.
Conventional subwoofers do a pretty decent job imo. Turning my entire
attic (or a dedicated room) into a sub would probably just annoy my
neighbors!

Admittedly I am not a real bass head though...

As far as I can see it just creates a draught !

EV used to make the fabulous 30W woofer with an Fs of 15Hz IIRC ! The data
sheet
includes advice for wall mounting for example !

EV have done some crazy things over the years and this was one of their
nuttiest. Bless them !

The 30W woofer was deeply flawed. The voice coil could only handle about a
60 watt amp without slowly frying.

Possibly the same voice coil as in the SRO-15 ?

The voice coil and magnetic structure
limited the Xmax to a few millimeters. I suspect that a modern 8" driver
could move about as much air.

If you consider the cone dia of ~ 6" vs ~ 28" that's a 22x ratio of cone area.

So a 30W with say 4mm Xmax would shift as much air as an 8" driver with an Xmax
of 88mm !

No contest really

Graahm