At first glance, JBL's Flip 4 Bluetooth portable speaker looks very similar to 2016's Flip 3. But looks can be deceiving: it's actually a slightly bigger speaker, weighing 1.14 lbs (517 g) -- 0.14 pound more than its predecessor -- and it's covered in more durable fabric with a tighter weave. As part of that external design change, the Flip 4 gets some changes on the inside, including new drivers and a presumably bigger battery that delivers 12 hours of battery life instead of the Flip 3's 10 hours. The speaker is also now fully waterproof instead of just splashproof.
A nice upgrade over its predecessor, the Flip 4 is one of the best speakers in its size and price class.
The JBL Flip 4 offers significant improvements over the Flip 3, including better sound and battery life, as well as full waterproofing; It has speakerphone capabilities and a more durable fabric covering.
Its bass is improved but it still lacks some real bass punch.