6 Bluetooth “bookshelf” speakers tested and evaluated by the editorial staff. They are all equipped with a speaker for low frequencies (boomer) and a second for treble (tweeter) On each pair, the speaker connected to the mains integrates the electronics, amplifiers and connections.
The rotary pressure dial placed on the back of the right speaker is used to select the source and adjust the volume. Source selection and volume adjustment are generally done from the remote control. Only the M20 HD offered by Q Acoustics have controls accessible on the front.