On many portable speakers like the JBL Flip 4, this is activated by pressing and holding the and Volume Down (-) button simultaneously for about 10 seconds.
Based on common audio hardware features (particularly with JBL speakers), the (often activated via a hidden service command) is a special setting designed for testing and enhanced bass performance, rather than daily use. Features of Low-Frequency Mode ("Service Mode") low-frequency-2.7z
It disables the standard Digital Signal Processing (DSP), meaning the speaker skips default sound optimizations to create a raw, loud, low-end sound. On many portable speakers like the JBL Flip
Using this mode for daily listening is not recommended as it can damage your speaker over time, or in some cases, rapidly, due to overdriving the components. Activation (Generally) or in some cases
