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Fried my Wilson Watt Puppy 7 tweeters, now what?

Somehow I managed to fry the tweeters in my Wilson Watt Puppy 7s.  Frequency response rolls off starting around 1300 kHz and is gone completely by 7000 kHz.  Resistors measure normally and putting a different full range speaker into that system also measures normally.  Problem exists regardless of whether I drive the WATTs directly or through the Puppies.  I briefly swapped in a DIY preamp with a loose wire that caused some sort of surge through my amps so I know when this happen although I am less clear on why or how it happened. 

Anyhow, I now have two WATTs without working tweeters.  Nothing I have read suggests there is any sort of fuse and since the resistors Ohm's measure to spec that leaves the tweeters right?  I have a call into Wilson, but I was hoping somebody on here has run into the issue before and has some experience replacing the tweeters or can offer some other advice?  I haven't had any luck googling the problem.
pinwa
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fuzztone's avatar
fuzztone
5,598 posts
 
I wouldn't install any replacement tweeters before r & r ing the offending amp.
pinwa OP
285 posts
 
Thanks for the input.  Wilson got back to me this afternoon and it is pretty much as ssand1 and steakster said.  In order to replace the tweeters you have to go through a dealer.  Wilson has actually been out of stock for a while on replacement tweeters for the W/P 7s but they expect some in soonish.  Cost sounds like around $1000 but he didn't have a firm number.
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lonemountain
451 posts
 
Tweeters usually fry over clipping of the amplifier, as the tweeter heats up trying to track a square wave. Under powering is most often the root cause of clipping, but not the only cause. The non linear nature of power output and SPL means a small 3dB change = a doubling of power. 3dB is the difference between 50W and 100W, 100W and 200W, or 250W and 500W. You can burn up tweeters in a passive system fast with small power amps and party!
Brad
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