Sennheiser HE 1 - Power Connection; Connecting to the Power Supply

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Putting the HE 1 into operation | Connecting the tube headphone amplier to the power supply system
Connecting the tube headphone amplifier to the power
supply system
CAUTION
Danger of damage to the product!
If you connect to an unsuitable power supply, the product can be damaged.
▷ Use a suitable power cable (supplied) to connect the product to the power
supply system (100 - 240 V~, 50/60 Hz).
▷ Connect a suitable power cable (supplied for the regions EU, UK or US) to
the IEC mains socket and a wall socket.
To disconnect the power cable:
▷ Push and hold the red safety pin on the power plug and pull the power plug
from the IEC mains socket.