Mystery Driver out of Altec 9864A Cabinet

I found two Altec Lansing Model 9864A Duplex systems for sale nearby, and decided to pick them up. One was destroyed from being dropped, presumably from the ceiling it was mounted to, and the other was near perfect. I pulled the driver out of the broken one, it is in great working condition, but I've got no clue what it is. Attached at pictures. It is a 16" driver, with a 1.4" throat for the large horn pictured.
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Can anyone identify what the driver is? It measures 4.7 ohm DCR on the woofer and 5.5ohm DCR on the tweeter.

Don't know the model #, but it's designed specifically for the 9864 cab and vice versa, so not really suited for other apps.

GM

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Originally Posted by GM

Don't know the model #, but it's designed specifically for the 9864 cab and vice versa, so not really suited for other apps.

GM

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So you think this is the original driver for that cabinet then? I wasn't sure if it was original or if it was a replacement. There are no markings on it which is unusual, other than the numbers 9520 / 9521.

It appears to be: 9864

GM

That's the Engine. I don't think it has a model#, maybe a part number. I think they were only sold in systems, and not bare drivers.

I have a single 9864.

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Originally Posted by Audio_by_Goodwill

That's the Engine. I don't think it has a model#, maybe a part number. I think they were only sold in systems, and not bare drivers.

I have a single 9864.

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Would you like a second one? And a replacement driver just in case? If so PM me. I don't know what I'm going to do with it.

Where were these installed? I'm told mine was in city hall, in the room where they hold the city council meetings. I got it cheap at the city auction........ probably because it looked like a ceiling mount heater!

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Originally Posted by Adam_G

Would you like a second one? And a replacement driver just in case? If so PM me. I don't know what I'm going to do with it.

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Sending PM.

9520 and 9521 will be the year and the week.

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515-8GHP and 299 combined. Interesting. With what looks like an MRII564

Slap those babies into A7 828 cabs. :)

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Originally Posted by VolvoHeretic

Slap those babies into A7 828 cabs. :)

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That would be interesting...... a "compact" A5!