“If it ain’t broke, don’t fix it,” goes the old adage and that’s exactly the philosophy JBL took when updating its already-excellent Charge 3 speaker. The design is basically identical, as are its specs, but the improvements are subtle and not noticeable until you begin listening to the speaker and realize that the sound quality has been refined.
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https://www.techradar.com/reviews/jbl-charge-4
