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Polk SDA 1C malfunction
GraphicFX:
Tweeters out on left Polk SDA 1C
Removed both tweets (SL-2000) one of them is not functioning, the other is, (battery click test) yet no sound when hooked back up. The rest of the drivers are just fine. (MW 6503, and MW6511). Removed the interconnect cable and no change.
Thinking it was a crossover problem, I removed the passive radiator to see if i could find a leaky cap. no luck due to them being film caps. These speakers had been modded using the usual mortite, dynamat, and seemingly modded Xover.
I don't know anything about the electronics nor do I know how to solder.
Any help or leads would be greatly appreciated.
Thanks in advance,
Andrew
schwarcw:
Greetings!
Replace the SL-2000s with the RDO-194s. I am surprised the Polks had modified crossovers and the original tweeters.
I might even have a couple of RDO-194s. I will check.
GraphicFX:
--- Quote from: schwarcw on May 19, 2015, 08:48:34 PM ---Greetings!
Replace the SL-2000s with the RDO-194s. I am surprised the Polks had modified crossovers and the original tweeters.
I might even have a couple of RDO-194s. I will check.
--- End quote ---
I have a spare SL2000 tweet, but I believe the problem is in the crossover.
I've taken this pic from the web. It is exactly how the xover looks in these SDA's. I'm doing this for a friend. The crossover in question is the one on the right of the picture.
schwarcw:
Ah! The crossover on the right has a polyswitch. It's the orange colored disk about 3/8" in diameter. Try jumping across the switch with a wire, two alligator clips. If the tweeter works when you jump the polyswitch, remove it and replace it with a 0.5 ohm resistor.
Do the same to the other crossover.
I know you may be on a tight budget but $200 for 4 RDO-194 tweeters will give you a nice improvement in the sound.
GraphicFX:
--- Quote from: schwarcw on May 19, 2015, 09:20:50 PM ---Ah! The crossover on the right has a polyswitch. It's the orange colored disk about 3/8" in diameter. Try jumping across the switch with a wire, two alligator clips. If the tweeter works when you jump the polyswitch, remove it and replace it with a 0.5 ohm resistor.
Do the same to the other crossover.
I know you may be on a tight budget but $200 for 4 RDO-194 tweeters will give you a nice improvement in the sound.
--- End quote ---
Read about but never thought about that polyswitch. I will test it tomorrow and get back with you. Thanks for the lead. Lets hope that solves the problem. Money is tight so the tweet upgrade will have to wait. Last year for his birthday I got him a replacement SL2000 from my 2B's This year, He's getting the other.
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