Repair RT25?
3dmdlr
Posts: 1
Greetings! I am new to the group and hope someone can help me. I have searched but couldn't really find what I was looking for. First of all I am pretty speaker illiterate so I will probably get the terminology wrong, please don't hold that against me 
I have a set of RT25's i have had since 1998. They rock and I have always loved them. Some say too bassy but I likes me some bass. Anyway, one of the tweets stopped working a while back(years) and i have just decided today to dig into it and see why. I disassembled the cabinet and removed both speakers and the board(driver? crossover?). I've hooked up the speaker to just speaker wire and it works just fine. I've also hooked up the bass wire from the board and it worked just like the other speaker. So I have decided it is one of the few components on the board and they look easy enough to solder so can some one give me some insight on how to fix this? Thanks!!
I have a set of RT25's i have had since 1998. They rock and I have always loved them. Some say too bassy but I likes me some bass. Anyway, one of the tweets stopped working a while back(years) and i have just decided today to dig into it and see why. I disassembled the cabinet and removed both speakers and the board(driver? crossover?). I've hooked up the speaker to just speaker wire and it works just fine. I've also hooked up the bass wire from the board and it worked just like the other speaker. So I have decided it is one of the few components on the board and they look easy enough to solder so can some one give me some insight on how to fix this? Thanks!! Post edited by 3dmdlr on
Comments
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Welcome to CP, 3dmdlr!
Polk Audio c/s monitors this section of the forum, so they may post in this thread when they notice it, but you could just contact them by telephone, e-mail, or the online chat feature (there's an icon on the top right of your screen in this forum). They're usually very good at sorting out this sort of problem, if the parts (or current equivalents) are still available. If not, they could help you troubleshoot the issue, and then you'd have a search on your hands to find used speakers to get the parts.
Good luck!Alea jacta est! -
Since you isolated the problem to the crossover board, do the following:
- check if there are any cold solder joints on the board (poor soldering). Ideally, quick run with a soldering run over all joints usually helps.
- check if the electrolytic capacitors are bulged at the top (the little cans). Sometimes they "pop" and you have to replace those.
Unless the speaker was dropped, the inductor and the resistors usually wouldn't be the first ones to fail.Panasonic PT-AE4000U projector for movies
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As was already mentioned, with high frequency signal (tweeter) you should suspect the capacitors first. Have you tried connecting a different speaker to the tweeter wires? Any sound that way? Most likely a poor solder joint somewhere would be my guess too.
JimInfinity QLS1, Polk SDA-1A, OLAdvent Econowave, Yamaha RXV-1300, CDC-685, P2200, AB International 9220A, Rane ME15B, Cambridge Audio 640P, Grant Fidelity B-283, Luxman PD277-AT7V, Pioneer PL707-Denon DL-207, DL-160....And projects on the bench!
