Where can I buy tweeters for my RA Labs speakers?

Flegal, that address in Bellingham is about a 10 minute drive for me, and that is where I bought these speakers at closeout just before they moved to Texas a couple of years ago. After the move there, I have no idea where they went. I definately will get in touch with Madisound Speaker Components, as that is exactly the type of info I was looking for. Mucho gracias http://www.avsforum.com/ubb/smile.gif


As far as these tweeters blowing, my Yamaha was at a very nominal volume when I heard the tweeter cut out, then back in, then out for good. When I checked, BOTH tweeters were blown, but I don't know that they blew at the same time, as the center channel tweeter is still fine, and most of my recent listening has been to AC-3 movies. When listening to a working tweeter in the center, you actually have to get up pretty close to figure out that the left and right tweeters were blown, as your ear hears the center tweeter and thinks that they are all working, but 2 channel music was a dead give-away that they blew. At any rate, I need new tweeters and I hope that Madisound has them http://www.avsforum.com/ubb/smile.gif


[This message has been edited by Bob Sorel (edited June 10, 2000).]

"Hmm. Did you swap the "burnt" tweets with good ones? This could be a filter, not a speaker, problem."


Yes, I did. So far the good tweeters from my rear speakers are still working. What do you mean by a "filter" problem?


"Have you got acces to a voltmeter or similar gear? If so, measure the R of the tweeters and compare it with the R of a known good one."


Yes, I do. I assume that the blown ones will either be open or completely shorted, depending on which way they blew.


"If the tweets are burnt and you listened at normal levels, your Yamaha could have a stability problem."


Hmmm....The Yamaha is not stable in what way? Current leakage? Voltage surges from the output transistors? I've owned the Yamaha for about a year and the RA Labs speakers for about 2 years with no problems, and then suddenly I blow TWO tweeters. This seems very odd to me. I used to play in a rock band, and we would blow tweeters maybe once every two years, but never did we blow two at a time. Very strange. Do you know how to test the Yamaha for problems? I have plenty of test equipment, but I just need to know what I am looking for.


Thanks again,


Bob

Thanks, Flegal. Now that's what I call an answer! I don't have a spectrum analyzer handy , but I do have a waveform generator and a scope, so I'll use the second method that you suggested. If it turns out that I am the victim of high frequency osscillation, how do I correct it, or is that a problem that is specific to each amp?


"I assume that the blown ones will either be open or completely shorted, depending on which way they blew.


Open in 99.99% of all cases. Shorted would mean a quasi-total voice coil meltdown, which very seldomly happens."


Hehe...In the rock band business it is fairly common to open up a burnt tweet and find a melted voice coil.


Thanks again, Flegal. I will be testing this amp this weekend before putting in new tweeters, as I don't want to fry the new ones http://www.avsforum.com/ubb/smile.gif