"Andy Evans" wrote in message

But I'm thinking that the actual length of enclosure behind the cone
is important.

It definately can be signficant. After all, that's what ported
enclosures work with, as do the unported ones.

Hello Arny - thanks for contributing. Yes - I mean what you point
out, that a good distance behids the cone is better than being tight
up against a back wall as it would be in a tall narrow enclosure.

Agreed.

e.g. I heard Jordan JX92Ss in a TL enclosure where the back wall was
a bare 6 or 8 inches behind the cone - surely you'll get reflections
back into the cone?

It happens.