เครื่องเสียง BOSCH เครื่องขยายเสียง, เครื่องขยายเสียง 120วัตต์ เครื่องขยายเสียง, BOSCH LBB 1930/20 120 W Plena Mixer Amplifiers 70 V / 100 V and 8 ohm outputs.

The LBB 1930/20 is a compact yet powerful 120 Watt, power amplifier with 100 volt line constant voltage and 8 ohm low impedance outputs.

2U high 19” case for rack mounting or tabletop use.

LEDs on the front panel of the LBB1930/20 show the status of the amplifier: power, audio output level, and supervised functions. This high performance unit fulfills a wide range of public address requirements at a surprisingly low cost.

• 120 watts
• Very high audio performance power amp
• Can be used to boost Plena Voice alarm systems with system monitoring
• XLR and jack input with XLR and Jack loop through outputs
• 100 volt line input. Ideal for remote location booster amps
• 100v, 70v and 8 ohm outputs
• Dual inputs with priority switching
• Temperature controlled forced front to back ventilation
• AC and 24VDC operation
• Mains, battery back-up and pilot tone supervision
• LED VU Meter
• TÜV certified according to IEC 60849

Specs.

Mains power supply
Voltage: 230 VAC, ±10%, 50/60 Hz
Inrush current: 8 A
Max power consumption: 400 VA
Battery power supply
Voltage: 24 VDC, +20% / -10%
Current max: 6 A
Performance
Output power (rms/maximum): 120 / 180 W
Power reduction on backup power: -1 dB

Mains power supply
Frequency response: 50 Hz to 20 kHz (+1 / -3 dB at -10 dB ref. rated output)
Distortion: <1% at rated output power, 1 kHz
S/N (flat at max volume): >90 dB
Line inputs: 2 x
Connecto:r 3-pin XLR, balanced
Sensitivity: 1 V
Impedanc:e 20 kohm
CMRR:>25 dB (50 Hz to 20 kHz)
Gain: 40 dB
100 V input
Connector: Screw, unbalanced
Sensitivity: 100 V
Impedance: 330 kohm
Line loop-through output: 2 x
Connector: 3-pin XLR
Nominal level: 1 V
Impedance: Direct connection to line input
Loudspeaker outputs: 3 x
Connector: Screw, floating
Direct output: 100 V, 70 V, 8 ohm
Priority only (from input 1): 100 V or 70 V internally selectable
Music (non-priority) only: 100 V or 70 V internally selectable