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Troubleshooting
Problem Solution
The sound is louder in one ear than
in the other.
Adjust the Balance
in the Settings Menu.
The sound volume is low even
though the volume is set to max.
Adjust the Basic Attenuation
in the Settings Menu.
The sound is only in Mono even
though it is connected via a stereo
cable to a sound source which
provides stereo sound.
Change to Stereo in the
Settings Menu.
The bass reproduction is weak. Switch o Bass Reduction
in the Settings Menu.
The Tone Control cannot be adjusted. Use the Settings Menu
to activate the Tone Control
buttons or to adjust the sound.
It is not possible to select T position. Use the Settings Menu to
activate the T position.
The unit is acting strangely. Reset the unit to the factory
settings in the Settings Menu.
Humming occurs when connecting
the stereo cable while charging.
Only use the supplied charger.
Interference is heard when used in
some environments
Move the product away from
the suspected source of radio
frequency energy, for example
a transmitter.
Technical information
Power supply
Battery power: Built-in rechargeable lithium-ion battery 3.7 V,
860 mAh
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.
Charging device: 5V 1A DC adapter
Operating time: BE9124 Earphones – up to 30 hours
BE9159 Neck Loop – up to 10 hours
Charging time: ~ 4 hours
Input signals
Microphone: Built-in electric condenser microphones.
(omnidirectional or directional)
Line input: 2.5 mm stereo jack plug, sensitivity 0 dBV (maxi-
mum input signal)
Automatic selection between line input and exter-
nal microphone
Telecoil: Angled at 45° for optimal function horizontally
and vertically
Output signals
Headphone socket: 3.5 mm stereo jack plug
Output power headphone
socket:
100 mW at 16 Ω load
Distortion:
BE9122 Headphones
BE9124 In-ear phones
0.6% THD
0.08% THD
Dynamic range: 90 dB SNR (electrical)
Frequency range: 40-10,000 Hz (electrical)
Max. output level,
saturation:
BE9122 Headphones
BE9124 In-ear phones
BE9403 Stetoclip
124.3 dB SPL (@ 2.5 kHz)
132.0 dB SPL (@ 5 kHz)
145.0 dB SPL (@ 1kHz, 50 mW)
8


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