UNIT-4 connects with W+ Link, Bluetooth®, a 3.5 mm mini-jack, or a 6.3 mm balanced jack. USB-C on the speaker is for power.
W+ Link is uncompressed 44.1 kHz, 16-bit audio, with 16 ms latency, over about 12 m. Press the Mode button for W+ Link or Bluetooth, or insert a cable.

USB-C audio goes into the transmitter, not into the speaker. X04 comes with UNIT-4. X02 comes with UNIT-4 (Model: MKI).


The transmitter also takes a 3.5 mm mini-jack.


The balanced jack on the back of UNIT-4 takes a 6.3 mm cable from a mixer or an interface.

Bluetooth 5.2. Hold the Mode button for 2 seconds to pair.