Electro-Voice E-V SIX

Styrene foam was used for a while in some drivers, around that time period..... as the new thing. as in, light, stiff.

Some British drivers were also done that way, IIRC...right around the time of the switch from alnico to permanent ferrite magnets.

Buy a pair of these, to use as subwoofers (no connection to seller): (https://www.ebay.com/itm/6-Electrovoice-30W-sub-woofer-speakers-for-tube-amplifier-audio-western-ele...) Same cone material as their 18". EV probably still offers OEM reconing kits, as the 30W was being manufactured late as the 80’s, when I was doing their warranty service.

I went to college with the guy who ran the mould for the cone on those drivers. There was exactly one mould and one mould only. the only two people for that year, who were specifically there being educated, with intent to use it for audio.

He was working at EV when it cracked.

No more EV 30" drivers. Literally happened on his watch.

That is why they want so much for them.

There are many other drivers these days but nostalgia fills the senses of many people.

Thus no buyers, but still 48 people watching the auction.

Perhaps they gave in and made a new mould, but he doubted they ever would. this was a long time ago, so, who knows.

(I had to search da innerwebs for my own posts on this subject to confirm the data point. Gosh. Old enough to have to check your own records of your own memory. It was George. At Goulton. In Gananoque.)