Operator`s manual

Connecting Headphones - 20
Connecting Headphones
To connect your headphones to the BlueTube Audio Amplier, use
headphones with a 1/4” headphone jack or use a 1/8” to 1/4” headphone
jack adapter. Connect in the port on the front of the amplier labeled
“PHONES”. The unit will automatically switch outputs to the headphones
and you will no longer hear sound from the speakers.