JBL Flip 4 Unboxing, Review, Sound Test Posted on September 8, 2017September 8, 2017 by thelostdigit The JBL Flip 4 is amazing, just watch the video below. Also, look at the woofer rumble on camera towards the end. Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like Loading... Related