Sennheiser HE 1 User Manual page 21

Putting the HE 1 into operation | Using the tube headphone amplifier connected to a Mac/PC
Open the "Audio Midi Setup" utility program and select "Sennheiser HE 1"
▷
from the left-side column.
From the
▷
In the device settings, select the maximum sample rate from the "Format"
▷
drop-down list. Select "384000 Hz" for the best possible sound quality.
drop-down menu, select "Use this device for sound output".
19