خانه صوت و کنفرانس بوشPublic Address and Voice AlarmPA, Commercial Sound and Emergency Sound Plena Public Address Solutions

LBB1925/10 System preamplifier, 6-zone

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Technical Specifications
Electrical Mains power supply
Voltage 230/115VAC, ±15%, 50/60 Hz
Current inrush 230/115 VAC, 1.5/3 A
Max power consumption 25 VA
Battery power supply
Voltage 24 VDC, +10% / -15%
Current max 1A
Performance
Frequency response 50 Hz to 20 kHz (+1 / -3 dB)
Distortion <0.5%
Bass control ±10 dB @ 100 Hz
Treble control ±10 dB @ 10 kHz
Channel separation >70 dB @ 1 kHz
Priority mute >40 Db
Dynamic range 100 dB
Mic/line input 1 x
Connectors 5‑pin DIN, 3‑pin XLR, balanced,
with phantom power
Sensitivity 1 mV (mic), 200 mV (line)
Impedance >1 kohm (mic); >5 kohm (line)
S/N (flat at max volume) >63 dB (mic); >70 dB (line)
S/N (flat at min volme/muted) >75 dB
CMRR >40 dB (50 Hz – 20 kHz)
Headroom >25 dB
Speech filter -3 dB @ 315 Hz, high-pass, 6 dB/oct
Phantom power supply 16 V via 1.2 kohm, (mic mode only)
Line input 3 x
Connector Cinch, stereo converted to mono, unbalanced
Sensitivity 200 mV
Impedance 22 kohm
S/N (flat at max volume) >70 dB
S/N (flat at min volume/ muted) >75 dB
Headroom >25 dB
Master output 1 x
Connector 3-pin XLR, balanced
Nominal level 1 V
Impedance <100 ohm
Tape output 1 x
Connector Cinch, 2 x mono
Nominal level 350 mV
Impedance <1 kohm
Headphone output 1 x
Connector 6.3 mm jack stereo, signal mono
Nominal leve 3 V
Impedance <100 ohm
Zone relays 5A
Contacts voltage 250 V
Contacts current 8A
Interconnection input / emergency 1 x
Connector 3-pin XLR, balanced
Sensitivity 200 mV (interconnection), 100 mV
to 1 V adjustable (emergency)
Impedance >10 kohm
VOX threshold 45 mV (emergency)
Interconnection output 1 x
Connector 3-pin XLR, balanced
Nominal leve 200 mV
Impedance <100 ohm
Relay contacts 30 V, 1 A
DC supply output voltage 24 V, 250 mA max
Mechanical Dimensions (H x W x D) 100 x 430 x 270 mm (19" wide, 2U high)
Weight Approx. 5 kg
Mounting Standalone, 19" rack
Color Charcoal
Environmental Operating temperature -10 ºC to +55 ºC (14 ºF to +131 ºF)
Storage temperature -40 ºC to +70 ºC (-40 ºF to +158 ºF)
Relative humidity <95%
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