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Cleaning COS-11 Mesh


enjoyfebruary
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I just received a couple of used COS-11s in the mail and the mesh screens look a little gunked up. I haven't even gotten home to test them yet, but considering that they are working and I am happy with the sound quality and do  keep them; does anyone have a preferred method of cleaning some of the gunk out? I do have a can of spray electronics cleaner that would probably take care of it, but maybe someone else has a better method? Thanks!

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If they sound good, then don't mess with it. If they don't sound good, you won't know if it's the "gunk" until you replace the screens. So you're in a bit of a predicament.

I'd drop by LSC if you're in LA. Mark can put them in the magic chamber and plot the freq response as compared to a new one. If he thinks the screen needs replacing, you might be able to have it done then and there.

You will need to pay for the time, so this isn't a free endeavor.

 

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11 minutes ago, RPSharman said:

If they sound good, then don't mess with it. If they don't sound good, you won't know if it's the "gunk" until you replace the screens. So you're in a bit of a predicament.

I'd drop by LSC if you're in LA. Mark can put them in the magic chamber and plot the freq response as compared to a new one. If he thinks the screen needs replacing, you might be able to have it done then and there.

You will need to pay for the time, so this isn't a free endeavor.

 

Excellent response. Thank you! :)

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