AKG PERCEPTION 820 TUBE Mode D'emploi page 6

Refer to fig. 2 on page 5.
6
2 Description
J GROUND LIFT: This pushbutton switch allows you to remove hum caused by ground
loops.
To open the chassis ground connection, press the GROUND LIFT button OUT ("LIFT" po-
sition).
To restore the chassis ground connection, press the GROUND LIFT button IN ("GROUND"
position).
PERCEPTION 820 TUBE