UNIT-4 is studio-flat out of the box. In the AIAIAI app, choose a sound profile or set the 5-band EQ.
Before you start
The bands are Sub, Bass, Mid, Upper Mid, and Treble. Each starts at +0.
Download the app from the App Store or Google Play.
Steps
- Press the Mode button so UNIT-4 is in Bluetooth®.
- Hold the Mode button for 2 seconds.
- Open the AIAIAI app and follow the instructions on screen.
- Choose a sound profile, or set Sub, Bass, Mid, Upper Mid, and Treble.
Watch UNIT-4 getting started:

If it doesn't work
- The app does not see UNIT-4. Hold the Mode button for 2 seconds, then open the app again.
- The sound does not change. Open the app again and set the band you want.