It's a real-time audio optimiser that we've already seen in the JBL Extreme 4, and its main job is to make the speaker go louder without the sound becoming distorted. The IP68-rated speaker ...

when you purchase the JBL Charge 4 Portable Bluetooth Speaker at Walmart and JBL, you’ll only pay $115. The full MSRP on this model is $200. Why you should buy the JBL Charge 4 The JBL Charge 4 ...