
I was reading this link and it says that the cone is made out of foam.Probably for weight as you suggest trying to move a cone that big.It must move large amounts of air though.
http://archives.telex.com/archives/E...0800%20EDS.pdf
The sides of the cabinet look tapered it is a corner horn I guess.

Gotcha !! But what I found interesting was that it the 30" foam cone woofer crossed over at 100 Hz and says it is the largest successful driver ever produced.Highly efficient down into the 35-40 Hz region.I never heard one so I wouldn't know how they actually sound.But would like to.

Your neighbors called. They like your music.

...well then, why settle for that puny thing?
Fostex FW800HS, 31.5" Super Woofer from Madisound
;-)
Discount for 10+ !
...and at least one person who seems to have actually done something with one:
Acoustic Horn - News
* AB I think you are in the area - there were a few of the EV's floating (no pun) around on CL a few months back... I can see if I can dig up email add's if interested... do not recall exactly, but IIRC at least one, or one set had damage. The other set, wanted multi-thousands.
The Hartley woofer...22-24inches in a horn loaded sub-woofer is the best big woofer I ever done heard....
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