How to Turn On Bass Boost on JBL Charge 3 - Tom's Tek Stop
Amazon.com: SOWO Waterproof Bluetooth Speaker Wireless- Portable Speaker Loud with Built-in Subwoofer and Tweeter, Extra Bass, Stereo Sound, IP67, Colorful Lights for Party, Outdoor, Camping - Black : Electronics
JBL Flip 3 review: A top portable Bluetooth speaker for the money - CNET
JBL Charge 3 review: A Bluetooth speaker that knows how to party | Mashable