celestion a2 tweeter blown or not

Do you have a meter to check continuity? Should NOT be zero and any greater than 8 or 10 ohms is suspect. Someone may be by with the real spec.
zero ohms is a short. Check speaker only, out of circuit.

Is there a fuse somewhere in the tweeter circuit?

Were the speakers plugged or unplugged with the circuit 'hot'? A brief spike can have high amplitude and come and go so quickly you may only hear a brief 'chirp'.

How bad is your singing? just kidding. Mine is worse.

Contact Celestion USA on this link for help:
http://www.celestion.com/stores/dealers_distributors/world_detail.asp?key=28&itemNumber=0
Good luck
Vinh Vu

First, thanks for all the responses. I really appreciate them all.

I looked at the crossover circuit board, it looks very clean, no altered color and no smell, I did not see any fuses there.

I am a nobody when it comes to electronic stuff, so I guess, tomorrow I will bring the tweeter to a speaker repair shop to see where the problem is. Hopefully, it is something trivial.

My other alternative is to look for "compatible" 1" diaphragms on line, and try to re-use the Celestion housing but right now I am not sure if that is where it failed.

By the way, I am in Austin, TX, if you know any decent speaker repair shop, please let me know. I just pick it out of random. There are not many of them though.

Measured the tweeter and all are zeros ohms. So they are blown. Looks like the hair line tiny coil is broken off. I wonder if replacing only the diaphragm part of the tweeter is good enough or do I have to replace the whole thing, diaphragm plus the magnetic metal part.

I just try to make sure after the repair, the great old sound can be salvaged as much as possible.

Got them replaced by F-series tweeters as suggested by Celestion/KEF of America. Sound acceptably OK. Able to retain the housing, so outside will look unchanged. But inside, behind the housing, the tweeter is one piece, you cannot separate the diaphragm from the magnets, and does not look as impressive as the old one since the new one is pretty small and of different material. The faraday ring from the old tweeters were partially reused and clipped on top of the new tweeters.

Just some info for those who have to fix Celestion A series like mine. Hope this helps.

The cost of two tweeters is approx $60 plus $40 labor for the pair.