RST Engineering wrote:
: Use your head, sir. THe speaker is an oddball double voice coil unit that
: can be driven with either radio or warning horns. Rat Shack wouldn't even
: know a double voice coil speaker if it bit them in the hiney.

: 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.

: Jim

My ignorance of the Cessna dual voice coil aside, I do know that dual voice
coil speakers are used in audio system. Generally, it's for subwoofers, though, so
something small enough for an aircraft audio system would likely be a specialty item.

My experience was with my own PA-28 with dual taps on the voice coils... one
for 8ohm, one for 4ohm. All my (relevant) avionics I installed had selections for 4/8
ohm speaker settings. I assumed this was a typical choice, but I'm apparently
incorrect.

Interesting to consider that "emergency systems" such as alarms and horns use
a speaker for annunciation.

-Cory


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* Cory Papenfuss *
* Electrical Engineering candidate Ph.D. graduate student *
* Virginia Polytechnic Institute and State University *
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