4.2 Replacing
Ear Pads
Fig. 6: Replacing ear
pads.
4.3 Unplugging the
Connecting Cable
Fig. 7: Unplugging the
connecting cable.
4.4 Unwanted
Noise, Feedback
4.5 Bass Cut Filter
(HSC 171, HSC 271)
Fig. 8: Opening the
phantom power
adapter.
Refer to fig. 8.
Refer to fig. 6:
1. Pull the ear pad(s) off the ear-
phone(s).
2. To attach the new ear pad(s),
pull the elastic hem of each ear
pad over the rim of the ear-
phone base plate all around.
Refer to fig. 7:
1. Grasp the connector, depress-
ing the locating button.
2. Pull the connecting cable off
the headset.
Note:
When you connect the
cable again, the connector will
lock automatically.
•
To prevent the microphone from picking up unwanted signals or
causing feedback (models HSC 171 and HSD 171 provide no head-
phone muting function), be sure to move the microphone arm into
its vertical center position every time before taking the headset off.
This keeps the microphone signal muted even if the microphone
channel remains open.
The HSC-PA phantom power adapter features a bass cut filter to sup-
press low-frequency noise and reduce proximity effect. The headsets
are delivered with the bass cut filter deactivated. To activate the bass
cut filter:
1. Disconnect the phantom power adapter from the mixer input.
2. Remove the fixing screw (1) from the phantom power adapter.
2. Unscrew the cable bushing (2).
4. Pull the pcb out of the shell WITH EXTRA CARE.
5. Remove the jumper (3) from the contact pins (4) to activate the bass
cut filter.
In order not to lose the jumper (3), place it on any two contact pins
(4) in a position at right angles to the ON position.
4 Operating Notes
17
HSC 171/271, HSD 171/271/Single
1
2
1
3
2
4
