I made this better looking cooling fan on this mini amplifier to make it sleek and one piece, I bought the exact size of cooling fan with the same dimension of amp which is 90mmx90mm. I put four metal bracket extension to the screws of amp which I found at sewing accessories. fits just right on fan's holes. Then I use quick ties to secure it. This setup is sturdier and cleaner.
Sorry for the broken fin, I accidentally touched it and breaks, now it's vibrating but I will fix it. I will put mesh on top to prevent accidents and also to guard the fins.

You can buy the 90x90mm fan at any online stores.

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