PA SYSTEM

LF-78240 / LF-78350 / LF-78500

Technical Specification

Model: LF-78240, LF-78350, LF-78500

Network Interface: Standard RJ45 input

Transmission Rate: 100Mbps

Protocol: TCP / IP, UDP, IGMP (multicast), IETF SIP

Audio Format: Mp3, WMA, WAV

Audio Mode: 16 bit CD level

Sampling Rate: 8K~48KHz

AUX Input: 1 group

AUX Sensitivity: 350mV

EMC Input: 1 group

EMC Sensitivity: 775mV

Local MIC Input: 1 group (optional f front or rear panel TRS interface or 3.5mm interface)

Local MIC Sensitivity: TRS interface 5mV, 3.5mm interface 10mV

Line output: 1 group

Line output level/impedance: 1000mV/470Ω

Earphone Output Connector: 3.5mm interface

Earphone load: 32Ω

Monitor MIC: 1 group

Monitor MIC Sensitivity: 10mV

USB: Maximum support 4T USB device; load <0.1A

SD: Maximum support 128G / SDXC card

Power Consumption: 320W, 460W, 650W  

Standby power consumption: <3W       

Power Output: 240W, 350W, 500W

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

THD: ≤1%

SNR: >65dB

Short -circuit Input:

0V / 3.3V, support dry contact input

Short-circuit Output:

Maximum 3A/30VDC dry contact output

Protection Circuit: DC output, overload, over

temperature, short circuit protection

Operating Temperature: 5℃~40℃

Operating Humidity:

20%~80% relative humidity, non-condensation

Working Voltage: ~190-240V 50-60Hz

Size: 484 x 385 x 132 mm       

Weight: 14.0Kg, 16.5Kg, 18Kg

Description

Installed in the weak current room or control room, built in with power amplifier, it is used for audio files broadcasting and local broadcasting in halls, corridors, indoor and outdoor areas.

Features

* Adopting standard 19-inch rack-mount design, aluminum industrial panel; with 4.3-inch TFT true-color LCD screen, 21 industrial metal buttons; with reserved infrared receiver function for remote control.

* Based on Luna cloud server, with high safety and stability, support 7×24 hour uninterrupted operations.

* Built in with 2GByte SSD; support remote server management and downloading in the background under limited bandwidth or automatic downloading in idle time, which can lighten the network burden, the files in media library can be played automatically in offline status.

* Integrated with USB and Micro SD (TF) card interfaces, maximum support 4T USB storage device and 128G / SDXC card. The user can play the files of USB, TF card and media library to the terminals.

* Built in with 60W / 120W / 240W / 350W / 500W constant-impedance (4-16Ω) and constant-voltage (70V / 100V) power output, strong power and free selection.

* With intelligent power management function, when no signal input, it will automatically cut off the power of the amplifier and switch into standby mode. The standby power consumption is less than 3W. It has programmable pre-opening power supply function.

* With multiple network access modes, including DHCP automatic distribution access, ADS intelligent dialing access, fixed IP address access, etc.

* Integrated with 24Bit professional sound card, realizing high-end audio quality, the highest audio stream up to 768kpbs.

* With 1 AUX audio input, 1 group MIC input, 1 EMC emergency input; Built-in with digital pre-amplifier; support user-defined priority; with 1 monitor MIC to achieve equipment self-test, working environment monitoring and operator assessment.

* Built-in 1 Line out independent audio output, to connect with external amplifier; With standard headset interface to realize audio monitoring, and headset microphone amplifying.

* 2 short-circuit output, 2 short-circuit input; Support flexible user-defined function; achievable of short-circuit acquisition, alarm trigger; realizable to connect with third-party platform like fire alarm, CCTV, etc.

* With 1 channel three-wired volume control can realize fire alarm overriding without DC24V power supply and no limitation of volume control quantity. It is compatible with 4-wired volume control with external DC24V power supply.

* Support multiple users to login separately; the access right is user-defined.

* Supports short-circuit input to restore factory settings, which makes the system maintenance convenient to the greatest extent.

* The graphical volume adjusting interface can adjust the volume of network audio, local MIC and local AUX input.

* Display the current broadcasting audio, two-way intercom, timed broadcasting, equipment status information, IP address, MAC address, etc, in the screen. The user can stop the broadcasting audio by pressing one button.

* Can check device condition and manage information through system background Web.

* Instead of terminal local upgrade, T-7700R can support remote firmware upgrade. It reduces intensity of maintenance person.