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Dead tweeter :(

post #1 of 11
5/8/05 at 3:05am
Thread Starter 
One of the tweeters in my Mission M73s died I was listening today and noticed things sounded a bit odd. The woofer sounds a bit odd, but it might just be the lack of the tweeter. These speakers were purchased in January and haven't been used all that much. They are in my bedroom which is a bit small for them so sound never gets turned up loud.

I am going to email Mission tomorrow. How are speaker warranty claims usually handled? I don't want to pay to ship these things and I don't have the boxes either. Are manufacturers usually willing to send replacement parts?
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post #2 of 11
5/8/05 at 3:08am
No, that will typically void your warranty, for you to open your speakers up yourself.
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post #3 of 11
5/8/05 at 3:22am
Usually the short live of tweeter is caused by your under-powered amp.
When you get a new pair, maybe you wanna to check if your amp is powerful enough to handle your listening level.
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post #4 of 11
5/8/05 at 3:24am
Thread Starter 
Shipping these things to England will probably cost me more than they are worth... Hopefully they have a repair facility in the US.
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post #5 of 11
5/8/05 at 12:26pm
Quote:
Usually the short live of tweeter is caused by your under-powered amp.
true,very true but I am thinking from what i know of the mission line that these are fairly high efficiency speakers and should be able to be used with just about any commercial amp without trouble if as you say you use them in a small room AND listen at moderate levels.

the amp may be suspect.

I have lost tweeters in my time,some very expensive tweeters but

1-playing loud for too long.The longer you play at high volume the better chances you have to ruin the voice coil because power=heat and heat buildup if there is no cooling period between peak events =se you later tweeter

2-accidently dropping the stylus on an LP with the volume up ! Not real smart (always turn the volume down,cue the disc,volume up)

3-losing a ground by unplugging a connection with the vollune up,really stupid and not recommended
other than those physical events which could be traced as the cause i once had an amp that i did not know was putting out ultrasonics so while the music was kinda loud it was not exessivly loud and when the tweeter went i was baffled

A buddy scoped the amp and found it was putting out a lot of energy out of band and this was hitting the tweeter continuously so it eventually overheated and went "ping"
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post #6 of 11
5/8/05 at 12:59pm
if it has to be done you can order a new tweeter from the company and replace it yourself if you know how.
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post #7 of 11
5/8/05 at 1:45pm
Check their US or local hq and see if they can sell you the driver.
I would call instead of e-mailing.
I did that with a monitor audio speaker and it was cheap, maybe $40 or so.
I made the mistake of putting 400watts from a bi amp monoblock into one speaker.
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post #8 of 11
5/8/05 at 2:37pm
Thread Starter 
Thanks for the responses.

I believe the Missions are 90db effecient.

I have used my modded Teac A-L700P and Denon AVR-1200 with them. I have been using the Denon lately as the Teac is apart for some more mods. The Teac seemed fine when I last used it, but it could be doing some nasty stuff up top that killed the tweeter. I am pretty sure the tweeter worked with the Denon, but I might be wrong. The speakers tend to only be background music while studying or am doing something I can't wear headphones.

I highly doubt I pushed any of the amps to clipping. I don't know a db range where I normally listen, but the max is probably similar to that of a loud (not yelling) conversation.

I am going to have to test my amps thoroughly before plugging them into anything decent.

Thanks for the help.
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post #9 of 11
5/8/05 at 5:27pm
Thread Starter 
I was just playing with the speakers trying to figure out if the woofer was messed up and now the speaker seems to be working fine. The speaker that was broken sounds a bit less dynamic, but it is subtle and might be my imagination. I tested with multiple amps and speakers last night and the problem was definately with the speaker.

I am now wondering if there are some bad connections somewhere.
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post #10 of 11
5/9/05 at 8:41pm
Are you saying there is no problem now except the speaker sound less dynamic? Is this limited to one amp or all amps? What's dynamic to you?

Are you hearing distortion at low volume? If so, another possibility is your amp has too high a DC offset. Of course there is always a possible crossover problem (this is very unlikely).

Also check your terminals, they might be loose and not making good connection.
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post #11 of 11
5/9/05 at 9:00pm
Thread Starter 
Everything sounds good now. I think I was just expecting to hear a problem the other day after the speaker started working again. The amp measures low offset low DC offset. No distortion. I just thought the trailing edge of some notes seemed a little muffled. I doubt the problem is gone, but everything is working right now.
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