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Dynaco A25 Grille Cloth Cleaning - Card Method

Zack Sainz

Active Member
Hey All!

After reading numerous threads about the best ways to clean Dynaco A25 Grille Cloths, I wanted to take a stab and post my results.

I tried a few methods and came up with with some techniques along the way. My method includes bleach, so attempt at your discretion. Bleach can weaken fabric, and final results may be different from the original factory color. Maintaining the Original color wasn't as important to me as having a clean grille.

As many of us know, when cleaning the original grilles, a black residue leaches from the frame on to the cloth, if we work quickly it will not be permanent.

I wanted to clean with things that I already had at home, I didn't want to wait on cleaning supplies from Amazon, so most people should have access to the following cleaning supplies at home, or very easy to attain locally.

Now to cleaning!

We will need:
-Spray bottle 1/4 bleach 3/4 water
-Foaming upholstery cleaner
-Soft bristle brush
-Hairdryer
-Old plastic cards (Spray cards with bleach before cleaning to ensure no dye will leach on to your grille cloth.)

Do ONE grille at a time.

Work in a well ventilated area, the bathtub or outside:
1. Spray with foaming upholstery cleaner, let set for 5 min, scrub gently
2. Rinse with cool water
3. Blot as much of the frame as possible with a white shop towel or paper towels
4. In a spray bottle, 1/4 bleach 3/4 water, spray the entire grille cloth. Scrub gently, let sit for 5 min
5. Rinse with cool water
--Repeat as needed to get desired cleanliness and desired lightness--

By now you should see a huge improvement, but the edges will still be a bit brown and have some black residue. To prevent the inky substance from getting to your grille cloth, we will need to wedge an old credit card, subway card etc., between the frame and the cloth.

----CARD METHOD----

If you want to save time, you can use two cards on opposed sides of the frame and work your way around.

6. On the backside slip a card between the frame and cloth.
7. On the front side, spray bleach mixture to the area of the card.
8. Quickly blot with a towel.
9. Dry the effected area with a hair dryer and continue to blot.
10. Move the card down the frame and repeat until the entire perimeter is cleaned and dry.

As you work your way around you will start to notice that the center of the grille is a little darker in comparison to the edges.

To fix:
11. Spray the center again with bleach, blot
12. Dry center with hair dryer.
--Repeat until the grille cloth is a uniform color--

13. Repeat all steps with next grille.

Last remarks, there are many ways to do the same thing. This is something that worked for me. I am sure I will continue to clean these things until the cows come home.

The attached photos are my results and cleaning supplies. I did my best to take the photos under the same lighting conditions I also white balanced for the most accurate comparison.

Let’s see your grilles!!
 

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The redone one looks great. Now just tighten it up on the frame and you have something.

I used a leftover sock from Magneplanar speakers. A bit woolier than the Dynaco fabric but I'm not so OCD that I can't enjoy the speakers. Hell I'm even ok with them not having the emblems on them.

You can see the differences in the fabric and what the finished with Magnepan sock looks like in these pics. One thing about the Magnepan socks, you can do a lot of Dynacos with a pair of socks. I changed a speaker from damaged off white to black and have the Magnepan fabric available for other speakers, too. Any of the speakers that use an off white, I'd be comfortable using the Magnepan fabric...see not as OCD as many here on AK.

Yours do look correct. Well done.
 

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I bought new grill cloth for my A25XLs and when we were done with the first one, misted the fabric with water to shrink it to the frame when the black residue stained the new cloth. I was pissed!!!! We decided to take it off and the wife put it in a pale with water and Woolite over night. The black crap came off the fabric. I then decided make new frames, painted them black and re-attached the grill cloth. What an ordeal.
 
Thank you!

Yours look great too!!

Yes! I do need to tighten the fabric a little.
I found after drying with the hairdryer the fabric tightens up a bit.

I am not ocd about most things either, my main thing is, am I still enjoying my music?
 
I bought new grill cloth for my A25XLs and when we were done with the first one, misted the fabric with water to shrink it to the frame when the black residue stained the new cloth. I was pissed!!!! We decided to take it off and the wife put it in a pale with water and Woolite over night. The black crap came off the fabric. I then decided make new frames, painted them black and re-attached the grill cloth. What an ordeal.
Oh wow! That does sound like an ordeal.

I found that once wet the black crap could come off if you blot it quick enough. Well, I wet it with bleach, but still was able to get rid of the black spots, even some black spots from the previous owner.
 
Oh wow! That does sound like an ordeal.

I found that once wet the black crap could come off if you blot it quick enough. Well, I wet it with bleach, but still was able to get rid of the black spots, even some black spots from the previous owner.

My new grill cloth probably was not like the original, more linen like, looks like AR cloth. It wicked right into the fabric!!!
 
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