JBL CHARGE 3 TL MODEL BASS TEST | LOW FREQUENCY MODE | Perfect Focus | 2019!!! - YouTube
how to turn on bass boost on JBL charge 3 - YouTube
Amazon.com: JBL Flip 6 - Portable Bluetooth Speaker, powerful sound and deep bass, IPX7 waterproof, 12 hours of playtime, JBL PartyBoost for multiple speaker pairing for home, outdoor and travel (Black) : Electronics