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Hello,A year and a half ago I bought a pair of Soundline SL-2 speakers that include what I think is the B&G RD50 transducer. While listening the other day at moderate volume, I heard a soft static pop sound, which was followed by a reduction in volume in the left channel. The reduction in volume only lasted a couple of seconds and then came back to normal volume. After that song I stepped away from the system for a couple of hours. When I came back and listened at even lower volume (about 75 dB), I heard another similar static pop and then the ribbon panel never made another sound again. At no time previous to this happening did I hear any distortion.
I am sure that the crossover did not go out because I put a 500 Hz test tone directly into the ribbon panel and heard no sound.
This particular panel is probably about 10 years old. Does anyone have an idea of the problems that can happen to B&G quasi-planar panels? What might a soft static pop indicate? Can these be fixed at home, or is time to buy a replacement panel?
Edit: I checked the resistance of both panels. The good one measures at just about 4 ohms, while the bad one measures at about 25 ohms.
Edit #2: I pulled the B&G panel out of the speaker and it appears that there is nothing that can be done as the high magnetic repulsion makes it not serviceable by DIYers. I am still interested to know what might have gone wrong though.
Thanks in advance for any ideas.
Alan
Edits: 08/06/14 08/06/14 08/06/14Follow Ups:
It seems rather obvious to me that you have a disconnect on the etched metal conductor and that is probably because of oxidation of the metal after the coating had been damaged. The damage could have been from chemical exposure, or humidity and salty environment. This is the first time I heard of an RD series driver dying of old age. 20+ year old Carver Amazings that use a particular version of the driver usually suffer damage everywhere else but the RD planar.
Call up BG and see if they repair the driver, and if so how much it would cost.
Thanks for your feedback. It is quite possible that humidity caused the damage, as in the summer the humidity is very high where they sit, and the dehumidifier was out for part a season last summer.
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