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So after seeing the early recommendations for Klipsch ProMedia 2.1s, I picked one of the old GMX-As up for $40. The hugely discounted price was due to some loose wiring, a crackly volume pot and some low-level hiss. Now the loose wiring was a half-hour's job with a soldering iron and I reckon the volume pot can be solved with liberal amounts of WD-40 (will try when I get home tonight). The hiss though - it only comes through the tweeters and is independent of the volume settings or what's being played, and it's symmetric between the speakers. What's causing it though is beyond my newbie level of electrical ability: I know it's a product of noise somewhere in (or before) the amplification circuit, but is there any way for me to diagnose the dodgy part without an oscilloscope? Google hasn't been a great help because Klipsch stuff apparently breaks in every way imaginable, and there're half a dozen reported root causes for hissings in this amp.
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Sep 12, 2012 16:15
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| # ¿ May 5, 2024 02:16 |
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