Sennheiser HE 1 - Replacing Amplifier Tubes

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Servicing the HE 1 | Replacing the headband padding
Replacing the headband padding
For reasons of hygiene, you should replace the headband padding from time to
time.
1. Hold the headband rmly in the middle and detach the headband padding
from one side to the other.
2. Place the new headband padding onto the headband and, starting from the
middle and moving outwards, attach it to the headband by pushing on the
latches until they click into place.
1
2
Replacing the amplifier tubes
The amplier tubes are consumable elements. The lifetime of the tubes
depends on the type and the duration of use. The amplier’s status LED
lights up orange when tube replacement is required. Always replace all
8 tubes with new ones. Instructions on tube replacement are enclosed
with the tube replacement set or can be downloaded from the Internet at
www.sennheiser.com/download.
You can use the amplier even if a tube replacement is required, but be
aware that the sound quality can be reduced.