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SIR 320 SIR Infrared System
16 Copyright by beyerdynamic
Volume control / memory function
The volume control is adjusted by “VOL” and “VOL”. During volume adjustment a dot will appear
in the top left hand corner of the display to differentiate between volume and channel selection
(without dot).
The minimum volume is displayed as “˙00”; maximum volume is displayed as “˙15” . The factory default
setting is “˙01” . After use the receiver keeps its last settings. When used again the receiver defaults to these
settings. This applies not only to the volume but also to the channel selection. When the volume settings are
“˙00” or higher than “˙08” the receiver automatically reverts to the factory default setting of, “˙01” after
switch-off.
This allows the next user to initially hear the audio signal and to protect the users hearing during switch-on.
The volume should not be at the maximum value (“˙15”) over a long period as this may affect or
damage your hearing.
The receiver has an automatic gain control, which protects it from strong signals within a short
distance of the IR radiator panel. A too wide distance between the IR radiator and receiver will result
in background noise. An optimised IR radiator installation guarantees a good distribution of the IR-
signal, resulting in reception without background noise.
Auto Switch-off function
The following will cause the receiver to switch off automatically:
• after approx. 15sec., when no headphone is connected
or
• after approx. 60sec., when no infrared signal is received
or
• directly, when you put it out of the charging tray