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I am writing to ask for suggestions for repairing one of my speakers.I purchased a pair of TC-60s some months ago and found that one had a detached reflex port. I reattached it without difficulty. I've recently upgraded other parts of my system and I now can hear a very slight buzz from the tweeter of the same speaker. I can only hear it with very pure tones such as single piano notes. It sounds as if there was a piece of tissue paper lying on the piano strings. Reversing the speaker cables at the speakers doesn't move this sound to the other speaker.Listening close to the speaker I can hear that the sound is coming from the tweeter, not from inside the cabinet or from the woofer.
I have a spare tweeter. My thought is that this speaker was probably dropped sometime in the past causing both these problems. I think the right thing to do is to replace the tweeter with the spare. The tweeter connection is soldered, so I don't want to do this if I should do something else first.
Thanks in advance for your help.
Alan Brody
Follow Ups:
I've seen that on TC-50s. Because the tweets come in 2 parts, the voice-coil/dome and the magnet, the slightest mishandling of the fragile voice coil will cause it to buzz, sometimes loudly, in the narrow slot where it sits in the middle of the magnet assembly.Suggest you can get a replacement voice coil from Madisound (it's cheap), take great care to note the polarity of the leads, and swap it out, oh so carefully.
That all assumes the 60's have similar tweets to the 50's.
Alan,It could be a tweeter going bad.
Or, it might be some crud built up in or on the tweeter dome. Might also be a damaged connection, either where the speaker cables connect or even at the crossover or at the tweeter. Might even be as simple as the tweeter's screws getting loose (had that happen once, took me 3-4 days to pin it down!)
Unfortunately if it is a bad tweeter, the tweeters used by Spica are an older Audax model no longer in production. You might try asking on the madisound site,(www.madisound.com). I'd be willing to bet that someone there could point you to a decent replacement tweeter.
Several caveats if you do have to replace a tweeter:
1. you'll have to get a pair of tweeters, otherwise the speakers won't sound the same (unbalanced sound).
2. the speakers will sound different.
3. the crossover probably won't be correct for the replacement tweeters. It may work OK, it may work so-so, or it may sound terrible.
4. you may have to modify the tweeter cutout to fit the tweeter correctly.
5. any modification you do will effectively reduce the resale value of the TC-60's to just about $0. OTOH, if you try to sell the speakers w/ a bad tweeter you won't be much further ahead.Good luck, hope you can revive your speakers.
PS
audax, for sure, on the tc-50, but all the other words are right on :)
Sounds like you should replace the tweeter. Make sure to use clip on heatsinks when you solder to the tweeter or else you might damage the connection to the voice coil. They sell them at Radio Shack. Also make sure you seal the tweeter into the box in the same way as the original, or else you will change the tunning of the box with an air leak.RonS
Thanks for taking the time to respond, Ron.I appreciate the tip on the clip on heatsinks. Glad I read your post before heating up the iron.
Alan
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