Problems with Infinity Prelude MTS mid-range

yes, i sold my mts preludes after replacing many of the drivers, mine also buzzed on piano music and after replacing the drivers i took apart the old ones only to find that the prelude drivers are faulty, the coating that infinity uses on the neo magnets starts peeling off with age and gets trapped between the voice coil and magnets causing the buzzing sounds that you hear, there is no way to repair them once they get like this, i replaced about 6 drivers in my towers and all of them had this same problem, although the 5.25 inch woofers are harder to detect the buzz sound as they are crossed over lower, but they also scrape or buzz, i called infinity and told them of the problem i was having and asked if there was a problem with this happening and of course the said no, they weren't going to tell me that they were faulty, i read about allot of other people that are having the same problems i was having, most of them thinking that they just lost a coil, boy if the only took apart the old driver they would be pissed to find that the magnets failed, as these speakers get older you will hear about it allot more, because IMHO the neo magnets are faulty as they deteriorate with age and peel,causing the buzzing sounds that you hear, too bad as i actually liked the sound of the speaker, what a joke i have a pair of 25 year old infinity's that have neo magnets and they are still like new, since Harmon took over infinity speakers went down hill, they really skimped out on the quality of neo mags used in the prelude.

i also had one of my subs go out for no reason at all, i never play my system loud so the subs were never pushed hard, they were working fine and the next time i went to turn on the system the sub did not work, had to send it in for repair, i never had any speakers before with so many problems as i had with the preludes.

Thanks everyone. If you are having problems please add to the thread. I'm going to keep pushing Infinity about this. They told me they get very few complaints about this speaker. That's insulting. Any one at Infinity is welcome to comment on our problems.

One of my 5.25 inch woofers is distorting.
One of the subs went bad and I sold the subs after it was repaired.

It's disappointing to hear this is becoming common as I was thinking of trying to get this 5.25 woofer repaired. I've been very pleased with the sound otherwise.

Yes, am having issues me-self.

I have a couple of the midrange drivers that are experiencing the buzzing you're referring to. Not sure if the voice coils have actually collapsed or if it's due to the peeling.

I was fortunate to have purchased quite a few replacement drivers and just take care of it myself. I know it's not from clipping or under driving my Preludes. I went with tons of clean power to prevent that from happening. I believe it to be a defect in the drivers.

Now I'm getting some really nice humming coming out of my subs. When you first turn them on they're fine. But, as soon as you send a signal to them... up comes the hum. Very annoying. Anyone else having this issue? Where did you send your Preludes to be repaired?

I was told to take them to a local electronics shop by Harmon. Don't know about you's but, here in WY, I'm not sure anyone would even know who/what Infinity is. Let me park my sheep first and then I'll take a look at your High-End Bose speaker-er!

I could repair the problem if I were able to have someone diagnose and tell me exactly which part's at fault. Use to build pc boards and can replace any and all electronics but I have no expertise on troubleshooting circuits.

Still love the sound reproduction from my Preludes. Running full range front and rears with the Prelude MTS for the Center Channel. Used to have a surround setup with Legacy's Focus and there's no comparison. I was really hesitant on powered subs but these have made me a true believer. Now if I could jut get rid of that annoying humming.

Hmmm,

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