Speaker issues

Discussion about old PC hardware.

Speaker issues

Postby Hamby » 2019-1-14 @ 01:33

I've an old set of speakers (maybe 20 years?) that I'm still using, because the sound is great; EmCom amplified multimedia speakers.
Recently, when I turn the volume knob, it puts out some static, and then the audio comes and goes out of the right speaker. Usually I can wiggle it enough to get the audio back.

Can anyone advise me as to what I can do to diagnose/repair this? I really don't want to toss these old speakers and buy new ones.
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Re: Speaker issues

Postby gdjacobs » 2019-1-14 @ 03:04

You need to open the speakers up and pump the volume potentiometer full of De-oxit while working it through it's full range of motion. Over time, it's built up some corrosion to the point where it's now making intermittent contact. Cleaning the pot should resolve the issue.
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Re: Speaker issues

Postby Hamby » 2019-1-15 @ 06:18

Thank you very much!
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Re: Speaker issues

Postby LunarG » 2019-1-15 @ 09:41

I have the same problem with my Roland MA-7 speakers, and contact cleaner spray in the pots don't seem to completely fix it, so I'm actually considering replacing the pots. But it is such a minor problem, I might put it off indefinitely. :D
WinXP : PIII 1.4GHz, 512MB RAM, 73GB SCSI HDD, Matrox Parhelia, SB Audigy 2.
Win98se : K6-3+ 500MHz, 256MB RAM, 80GB HDD, Matrox Millennium G400 MAX, Voodoo 2, Waveforce 192XG.
DOS6.22 : Intel DX4, 64MB RAM, 1.6GB HDD, ELSA Winner 1000PRO, GUS 1MB, SB16.
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Re: Speaker issues

Postby gdjacobs » 2019-1-16 @ 00:17

Replacement pots can sometimes be difficult to find, but it's definitely a more permanent solution.
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Re: Speaker issues

Postby probnot » 2019-1-16 @ 03:20

LunarG wrote:I have the same problem with my Roland MA-7 speakers, and contact cleaner spray in the pots don't seem to completely fix it, so I'm actually considering replacing the pots. But it is such a minor problem, I might put it off indefinitely. :D


That's a shame. The best sounding modern PC speakers I ever had (Klipsch Promedia 2.0) had the cheapest, shittiest pots. The carbon traces were gone within a year :( I bypassed the volume and bass controls and used the PC volume, until the IC inside finally died.
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Re: Speaker issues

Postby realnc » 2019-1-23 @ 19:46

probnot wrote:That's a shame. The best sounding modern PC speakers I ever had (Klipsch Promedia 2.0) had the cheapest, shittiest pots. The carbon traces were gone within a year :( I bypassed the volume and bass controls and used the PC volume, until the IC inside finally died.

I had this issue since ever. All my speakers developed this problem after some years, usually within 5 to 10 years. I now finally gave in and bought some higher-end speakers (Edifier S1000DB). Let's see if they'll also suffer from this. 9 years to go...
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