The Bass, Treble and Echo buttons on the control panel on top of the Partybox only applies these EQs/effect to the Microphone inputs on the rear of the speaker - for Karaoke use. The EQs and Echo effect cannot be applied to other sources or inputs such as Bluetooth, Aux or USB.

If more bass is desired, there is a Bass Boost button on the top control panel (with 2 levels of Bass Boost: Off, Level 1 & Level 2, switched through pressing the button multiple times). This will be applied to the sources and inputs mentioned above (but not the microphone inputs).