JBL Flip 4, Black - Waterproof, Portable & Durable Bluetooth Speaker - Up to 12 Hours of Wireless Streaming - Includes Noise-Cancelling Speakerphone, Voice Assistant & JBL Connect+ : Electronics
JBL Flip 4 Sound/Bass Test - YouTube
JBL Flip 4 - How To Activate Low Frequency Mode ! "DSP OFF" - YouTube