Hi,
I've repaired a set of Acoustic Research AR-8's. One of the tweeters has been replaced. The speaker with the replaced tweeter produces less highs than the other. Could this be caused by a bad capacitor in the crossover circuit (the crossover consists only of one capacitor in these speakers)? I'm suspecting that the crossover could be the cause of the faulty tweeter as the speaker with a new tweeter does not produce the same sound as the other.
I've repaired a set of Acoustic Research AR-8's. One of the tweeters has been replaced. The speaker with the replaced tweeter produces less highs than the other. Could this be caused by a bad capacitor in the crossover circuit (the crossover consists only of one capacitor in these speakers)? I'm suspecting that the crossover could be the cause of the faulty tweeter as the speaker with a new tweeter does not produce the same sound as the other.
If you're sure that the replacement tweeter is exactly the same as original, then you're left with the crossover. The original caps were probably Bipolar electrolytics, which will deteriorate with age, so probably need to be replaced.
Mike
Mike
I would say the amplifiers volume is the culprit for the "faulty" tweeter. Capacitors normally go low value with age.
Simple test: Swap speaker wires going from left to right channels and see if the problem moves with the wire change or stays in the same channel. If it stays in the same channel then your amp has a problem. If the sound problem moves to the other channel then try swapping out the new and old tweeters. If no difference then try swapping out the crossovers. Just a simple case of eliminating the obvious.
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Thanks for the feedback!
Swapping around the tweeter and crossover I'm getting very sure that the capacitors need to be replaced.
There is no possibility that the capacitor in the crossover caused the tweeter to fail (reads zero ohms)? I have no other speakers atm and would like to use them until I get the caps replaced. If, however, the caps could be the culprit I will let them rest.
Although, it seems quite logical that the amplifier caused the tweeter to burn: The previous owner was my neighbor. He put the speakers outside on the stairs after a party, both woofers blown. I grabbed them right before it started to rain. He was a man that never took care of his stuff.
The tweeters have the same model number, look identical and both read 5.3 ohms.
Swapping around the tweeter and crossover I'm getting very sure that the capacitors need to be replaced.
There is no possibility that the capacitor in the crossover caused the tweeter to fail (reads zero ohms)? I have no other speakers atm and would like to use them until I get the caps replaced. If, however, the caps could be the culprit I will let them rest.
Although, it seems quite logical that the amplifier caused the tweeter to burn: The previous owner was my neighbor. He put the speakers outside on the stairs after a party, both woofers blown. I grabbed them right before it started to rain. He was a man that never took care of his stuff.
The tweeters have the same model number, look identical and both read 5.3 ohms.
If the cap is reading 0 ohms it is shorted and WILL lead to tweeter failure because it can no longer block low frequencies.
Don't use the speakers until that issue is resolved, or disconnect the tweeters and run without them until they're repaired properly.
Mike
Don't use the speakers until that issue is resolved, or disconnect the tweeters and run without them until they're repaired properly.
Mike
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