Radions are getting loud

Gem Tang 88

New member
I bought 2 radion xr15w pro about 2-3 months ago, since then i had it running at 100% for 9 hours everyday. About a week ago they started to get louder, i ran updates for the lights, the loud was stopped for a few days and now it happens again. Is it normal or i need to bring it back to my LFS to exchange ?
 
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