Bosch LBB 1925 Istruzioni per gli Interventi Scaricare il pdf (Pagina 23)

Bosch Security Systems | 2003-09 | 3922 988 99483en

Plena System Pre-amplifier | Installation and Operating Manual | en | 23

9 Technical data

9.1 System pre-amplifier LBB 1925

9.1.1 Electrical

Mains voltage 230 V/115 Vac, (15%, 50/60 Hz)

Max mains power consumption 50 VA

Battery voltage 24 Vdc, +20%/-10%

Max battery current 1 A

9.1.2 Performance

Frequency response 50 Hz - 20 kHz (+1/-3 dB)

Distortion <0.5%

Call channel

Bass control -6/+6 dB at 160 Hz

Treble control 0/+12 dB at 5 kHz

BGM channel

Bass control 0/+20 dB at 100 Hz

Treble control 0/+18 dB at 15 kHz

Channel separation at 1kHz >65 dB

Priority mute >50 dB

9.1.3 Inputs

Call station inputs (8-pin DIN, balanced, for LBB1941/00 and/or LBB1946/00)

Sensitivity 1 V

Data RS485, 1200, N, 8, 1, 0

Mic/Line input (3-pin XLR/5-pin DIN, balanced)

Sensitivity 1 mV (microphone), 200 mV (line)

Impedance >1 kOhm (microphone), >5 kOhm (line)

S/N (flat at max volume) >63 dB (microphone), >70 dB (line)

S/N (flat at min volume/muted) >75 dB

CMRR >40 dB (50 Hz - 20 kHz)

Headroom >25 dB

Speech filter -3 dB at 315 Hz, high-pass, 6 dB/oct

Phantom power supply 16 V via 1.2 kOhm, in microphone mode only

BGM input (Cinch, unbalanced, stereo converted to mono)

Sensitivity 500 mV (CD), 200 mV (aux, tape)

Impedance 22 kOhm

S/N (flat at max volume) >70 dB

S/N (flat at min volume/muted) >75 dB

Headroom >25 dB

PC input (Cinch, unbalanced, stereo converted to mono)

Sensitivity 1 V

Impedance 22 kOhm

S/N >70 dB

Technical data

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