What is this hole in my earbuds? JBL Reflect Flow Pro : r/headphones

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JBL Reflect Flow Pro review - SoundGuys

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Anyone tried both Milwaukee and Dewalt's jobsite wireless ear buds? Wondering about the difference. The Dewalt ones are on sale for $70 : r /MilwaukeeTool

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JBL Reflect Flow Pro review - SoundGuys

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