Removing mold/mildew from the grille cloth on AC15C1

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Removing mold/mildew from the grille cloth on AC15C1

Postby caloyburger on Wed Oct 13, 2010 3:26 am

I've had my AC15C1 for about two months now...great sound, great build quality except it's starting to grow mold/mildew on the baffle board. I peeked inside the cab and you could see mold spots peppered all around. I know it's purely a cosmetic thing and has nothing to do with sound but I'm not too happy about the "spotted" look on this otherwise beautiful looking amp. I've had an AC30CC and an AC4TV placed at the same area of the room for years prior to this amp but no molds ever grew despite the high humidity where I live.

Any way to remove the mold/mildew at least on the face of the amp? I know the grille cloth is delicate so I don't plan on rubbing vinegar, peroxide or whatnot to clean the amp. Can it be prevented too? Thanks!

Here are some photos of what it looks like:
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Re: Removing mold/mildew from the grille cloth on AC15C1

Postby gigant0r on Wed Oct 13, 2010 6:10 am

Try with compressed air and put some of these inside of that amp:

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Re: Removing mold/mildew from the grille cloth on AC15C1

Postby johnnysavant on Wed Oct 13, 2010 11:23 am

It appears that there is no mildew where the speaker is. So, the mildew must be related to a problem with the baffle. I've never seen this on 50-yr old amps let alone a new one with synthetic fiber grill cloth. I don't have a good solution for cleaning it w/o experimentation because I don't know the exact composition of the material. Either way, you're going to have to remove it from the baffle, so you can deal with the underlying problem.

I would remove the cloth and thoroughly clean, seal, and repaint the baffle. Then put new Korg Vox grill cloth on it. Since you can buy the same cloth, it's probably easier to replace it than trying to clean it. If the cloth were vintage, it would be a different story.
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Re: Removing mold/mildew from the grille cloth on AC15C1

Postby LangMurf on Wed Oct 13, 2010 7:36 pm

Fully concur with johnnysavant... it has to be an issue with the speaker baffle... otherwise, there would be mold where the speaker hole is too...

Is there mold anywhere else on the amp, other than the front of the speaker baffle?
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Re: Removing mold/mildew from the grille cloth on AC15C1

Postby Mayhawk on Wed Oct 13, 2010 10:09 pm

Had the exact same thing happen with my Vox cab (V212BNX). Not only did it get covered with mold (???), but the grillcloth had this big stain from someone spilling a drink over the cab (ergo, the reason I got this cab for a song!) Here's what I did.....

1. Remove the speakers.

2. Hose the cab down with a light spray.

3. Wash the cab and cloth with a soapy solution using a very soft 'exploded' bristle brush like you use to wash cars. I also used car wash soap.....much more gentle a soap. (no, don't use a hard bristle brush and Ajax!!!! :shock: )

4. Hose off again and then let dry in the sun.

5. Put the speakers back in.....if you are unsure about wiring, draw a picture before removing the speakers in step 1.

My cab looks showroom new now....even the grillcloth drink stain is history! :wink:
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Re: Removing mold/mildew from the grille cloth on AC15C1

Postby Porge on Wed Oct 13, 2010 10:18 pm

I'd bet mayhawk's on the money, but have experience cleaning 70's fender grillcloths with windex and soft cloths. Although the baffle will be more structurally stable than a chipboard grillframe, keep it as dry as possible. Probably not as big an issue with a vox though..
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