2. amps-preamps
  3. 147288-68085

Proac Ribbon Tweeters Damaged

Hi all - this is my first submission, so looking forward to your responses...

I own 2.5 year old Proac D48 R speakers, powered by a Parasound Halo A21 amp (about 8 years old). When listening the other day I thought the speakers sounded dull, muddy. It appears both of my ribbon tweeters have gone out and I am at a loss to understand why.  The amp is certainly not under powered to cause clipping damage and I never play my unit abnormally loud  - maybe 1/4 to 1/3 total volume.

As you can imagine, my repair/driver replacement will not be covered by warranty as this is not considered a manufacturer defect. I am told the tweeters run $399 per.

Worst thing I can do is have these repaired and then have it happen again. HELP!
gnoworyta

Showing 3 responses by erik_squires

erik_squires
15,657 posts
 
Weird. 

DC leakage on the amps won't cause this, because usually the tweets are protected by a capacitor. DC leakage would fry the woofers.

So, if you are _sure_ the issue is in the tweets, it's not DC, but it could be high frequency oscillation, which is hard to detect without a scope.
erik_squires
15,657 posts
 
If it really is the tweets, did you recently replace your speaker cables?? Sometimes high capacitance can lead to amp oscillation.
erik_squires
15,657 posts
 
Um, you should check to see if the ribbons are truly what is damaged. Lots can go wrong in the crossover.

Best,
E
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