The inner equipment also permits an entire range of EQ controls. From the Marshall app on your phone, you'll be able to make a number of adjustments to have the sound you wish. About the speaker itself, You may use the brass control panel to adjust bass and treble. https://www.bluetoothspeaker.top/led-speaker-with-hd-sound-wireless-for-home-party-beach-electronic-gadgets-gift/