Concentrate to the frequency range with the Altavoces Bluetooth �?the wider the range, the better the general sound quality. Look at brands like Ultimate Ears that offer Bluetooth microphones for even clearer audio. Another way to gauge the audio quality of portable Bluetooth speakers is by looking at decibel https://www.bluetoothspeaker.top/top-fashion-stereo-surround-sound-audio-multi-function-rgb-color-led-light-bluetooth-speaker/