Any info on Altec 3000 muticell tweeters

[Albert Allen]

There is a pair that I am looking at for use in a home brew coaxial but I don't know the frequency range....does anybody know about these?

[Mirrophonic Sound System]

These seem to be rare and highly sought after and
attract high prices when they come up for auction.
they are more for supertweeter service than for
midrange in a custom coaxial as you suggest.

I think they were used in a 60's 2-way crossing over
at around 2.5k 0r 3k. The ones I saw were the old
green color.

Frequency range would be 2k to beyond 20k as they are
a low mass/ small voice coil (1.25"?) type compression
driver/horn.

[Charles Chance]

Here's the URL to catalog page at Lansing Heritage that describes 3000H.
Altec Lansing 3000H

[Albert Allen]

Thank you very much, that is just what I needed.