I play fast and loose with the design of aircraft systems UNTIL it comes to
some sort of safety-of-flight consideration.

Yes, of COURSE I could tell you how to drive one speaker from two audio
sources using a transformer. Would it provide the same reliability that a
dual-cone speaker gave you? I don't know because I can't run the tests that
the Cessna engineer ran to certify the sucker. I'm not about to tell you
how to do something that would compromise that design.

Having SAID that, I'm more than willing to discuss how to drive a single 8
ohm speaker from two audio sources PROVIDED that I'm not told that one of
them is the horns for the stall and landing gear. That would violate my
personal comfort limits.

Jim





"John Clonts" wrote in message
...

"RST Engineering" wrote in message
...

I'd suggest that John contact Neal's Speaker Repair in Sacramento. He's
done some work for me and does a damned fine job of it ... and if he says
he can't get double coil repair parts, you've got Cessna to deal with.


Hello Jim, I have done just that, thanks!

I don't know much about audio, but isn't there some kind of "2-to-1
transformer" which could be put in there to "combine" the two audio
signals and drive a conventional ($15?) speaker?

Cheers,
John