The internal equipment also permits a full range of EQ controls. From the Marshall app on your phone, it is possible to make a number of adjustments to find the sound you need. Around the speaker itself, You should use the brass control panel to adjust bass and treble. https://www.bluetoothspeaker.top/vintage-multifunctional-wireless-speaker-led-speaker-karaoke-speaker-home-singing-karaoker/