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Technical information
Power supply
Battery power Internal Lithium-Ion type, 617 mAh, type NTA2617
CAUTION:
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.
Operating time, fully charged 8-12 hours (standard battery)
Transmitter charging time 2.5 hours (standard battery)
Receiver charging time 2.5 hours (standard battery)
Input signals
Microphone Internal electret condenser type (omnidirectional)
External sound source input 2.5 mm stereo jack plug (0 dBV max input signal)
Automatically selects Aux. input or External mic.
Output signals
Headphone socket 3.5 mm stereo jack plug
Output power 100 mW @ 16 Ω load
Distortion BE9122 Headphones 0.6 % THD
BE9124 Ear Phones 0.08 % THD
Dynamic range 95 dB SNR (electrical)
Frequency range 40 – 10.000 Hz (electrical)
Max output level, saturation
BE9122 Headphones
BE9124 Ear Phones
BE9125 Stetoclips
BE2250: 124.3 dB SPL / BE2270: 124.3 dB SPL (@ 2.5 kHz)
BE2250: 132.0 dB SPL / BE2270: 130.5 dB SPL (@ 5 kHz)
BE2250: 133.7 dB SPL / BE2270: 133.6 dB SPL (@ 1 kHz)
Full on gain
BE9122 Headphones
BE9124 Ear Phones
BE9125 Stetoclips
(60 dB SPL input signal @ 1 kHz):
BE2250: 42.5 dB / BE2270: 44.0 dB
BE2250: 55.0 dB / BE2270: 57.5 dB
BE2250: 58.2 dB / BE2270: 64.2 dB
Full on gain
BE9122 Headphones
BE9124 Ear Phones
BE9125 Stetoclips
(60 dB SPL input signal, HFA):
BE2250: 46.5 dB / BE2270: 49.0 dB
BE2250: 51.5 dB / BE2270: 56.0 dB
BE2250: 52.0 dB / BE2270: 59.4 dB
Radio function
Digital radio technology 2.4 GHz frequency band, 3 channels
Co-exists with other equipment
Automatic channel selection
128 bits encryption
Topology Point-to-point or Point-to-multipoint
Diversity 2 antennas for reception, one antenna for transmission
(Rx + Rx/Tx)
Transmitting output power Max. 25 mW
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