PA SYSTEM

LF-7760 / LF-77120

Technical Specification

Model: LF-7760 / LF-77120 

Network Interface: Standard RJ45 input

Transmission Rate: 100Mbps

Protocol Support: TCP/IP,UDP,IGMP(Multicast)

Audio Format: MP3

Audio Mode: 16 bits CD sound quality

Sampling Rate: 8K~48KHz

EMC Input Sensitivity: 775mV  (Unbalance)

AUX Input Sensitivity: 350mV  (Unbalance)

MIC Input Sensitivity: 5mV   (Unbalance)

AUX Output Amplitude:

1000mV  2 lotus flower output interface

AUX Output Impedance: 470Ω

Treble Adjustment Range: ±10dB

Bass Adjustment Range: ±10dB

Rated Power: 60W / 120W     

Power Consumption: 90W / 180W                     

Standby Power Consumption: <3W

Frequency Response: 80Hz~16KHz +1/-3dB

Harmonic Distortion: ≤1%

SNR: >65dB

Output Method: 4 ~16Ω constant resistance

output, 70V / 100V constant pressure output

Circuit Protection: DC output, overload, over

temperature, short circuit protection

Working Temperature: 5℃~40℃

Working Environment Humidity: 20%~80%

relative humidity, no condensation

Power Input: ~220-240V 50-60Hz

Size: 484 x 303 x 88mm       

Weight: 8kg / 9.7kg 

Description

Installed in low voltage or sub-control room in the radio management area, built-in power amplifier with high-fidelity, suitable for the hall, corridor, outdoor and other areas of the program broadcast and local radio.

 

Features

*  Standard 19 inch rack design,  black aluminum panel, solid handle, professional mechanical assembly process, the appearance is very high-end.

*  Industrial-grade LCD display in 3.4-inch , it can clearly show the majority of dot pattern and machine working status; equipped with infrared remote control, on-demand all contents in server program library, available to control the playback / pause, flexible and simple operation.

*  With embedded computer and DSP audio processing technology, high-speed industrial-grade SCM system chip, start time is less than 1 second.

*  Built-in 1 network hardware audio decoding module, support TCP / IP, UDP, IGMP (multicast protocol), to achieve network transmission 16-bit CD audio quality audio signal.

*  Built-in high-fidelity professional analog amplifier, with 60W / 120W / 240W / 350W / 500W constant resistance (4-16Ω) and constant pressure (70V, 100V) power output.

*  1 line (AUX) and 1 microphone (MIC) input interface, with independent volume and treble/bass adjustment potentiometer control, support broken network local paging function.

*  1 channel EMC input interface, enter the emergency alarm voice signal is direct connection (Without switching), with the highest priority.

*  2-channel audio signal auxiliary output interface, can extend to external connect power amplifier, the standard lotus seat interface, wiring connection is very convenient.

*  1 way of three-wire volume control relay output interface, no need 24V power supply, it compatible with four-wire volume control alarm relay output at the same time, it needs DC 24V relay power supply.

*  Built-in intelligent power management, when there is no music or call, it will automatically cut off the power amplifier, when there is signal, it will automatically turn on the power amplifier, support IP software programming pre-open power amplifier function.

*  Built-in 3 priority settings

*  EMC with the highest priority.

*  The network alarm signal has higher priority than MIC, AUX and network background music signals.

*   MIC has higher priority than AUX and network background music signals.

*  AUX and network background music for the same priority level.

*  Support silence intensity preset decrease function, support background accompaniment preset function; support status light display, including level indicator, protection indicator, standby light and so on. Machine standby power is less than 3W, to meet the national environmental protection and energy saving certification standards.

*  Compatible with routers, switches, bridge gateway, Modem, Internet, 2G, 3G, 4G, multicast, unicast and any other network structure.

*  Digitalized products, easy expansion, not limited by geographical location, no need to increase the engine room management equipment, adopt a total network of free road construction design, easy to install.

*  It supports remote hardware upgrade of the terminal, no need to upgrade at the local site, to reduce maintenance burdens and make more simple operation.