Features

• High-grade aluminum 2U black wire-drawing panel, 19-inch rack-mounted installation, beautiful and elegant;
• Adopts domestic integrated chips and Linux system, featuring excellent stability, security, portability and flexibility, which is incomparable to single-chip solutions;
• CPU: ARM Cortex A7 @ 900MHz;
• Audio Codec: Supports software codec, compatible with G.711, G.726, ADPCM, and audio 3A (AEC/ANR/AGC);
• Standard 1×10/100M RJ45 network communication interface, supporting LAN and WAN deployment;
• Built-in 1-channel network hardware audio decoding module, enabling real-time/timed music playback;
• Sampling rate adjustable in the background, allowing free selection of the highest sampling rate in the LAN for optimal sound quality (supports WAV 8K/16K/44.1K, ACC 16K/44.1K/48K optional);
• Background hardware resource monitoring, displaying CPU and memory usage ratio, and continuous running time;
• The device supports remote upgrade of standalone and batch units in LAN and WAN, facilitating efficient and fast customer service;
• Volume potentiometer adopts fully sealed dust-proof process, permanently dust-proof with noise-free adjustment;
• Adopts wide-voltage PFC circuit, supporting normal operation with AC100V-240V power supply, immune to voltage fluctuations;
• Adopts high-efficiency Class D digital amplifier, with complete protection circuits such as overload, overvoltage, overheating and direct current;
• Rated output power: 80W/120W/180W/240W/300W/350W/500W;
• Output modes: 4-16Ω fixed impedance output, 70V/100V constant voltage output;
• The device is equipped with independent treble and bass adjustment, which can be adjusted according to on-site requirements;
• 2-channel local microphone input with independent volume adjustment;
• 1-channel local line input with independent volume adjustment;
• 1-channel EMC emergency audio input, for priority broadcast, at the same level as network signals;
• 1-channel auxiliary audio output interface, expandable for external power amplifiers;
• 1-channel local network volume adjustment function;
• 1-channel USB input interface, supporting playback of all tracks in the USB flash drive, plug-and-play with no need for control;
• Equipped with 4 LED status indicators (power indicator, audio signal indicator, peak indicator, protection indicator) for clear working status at a glance;
• Built-in 3-wire control forced cut output interface, unlimited number of paging zones without exceeding the amplifier power;
• Built-in DC24V power output, for strong-cut 4-wire paging zone controller;
• 1-channel short-circuit signal input, which can trigger the local alarm via software settings;
• 1-channel short-circuit signal trigger output, used to drive other linked devices;
• The device has 3-level priority functions: EMC and network are the highest priority, MIC1 is the second level, MIC2 and AUX are the third level;
• The amplifier adopts intelligent power management, automatically turning off the main power supply when there is no signal to meet energy-saving and environmental protection requirements, and can be manually turned on/off when necessary;
• Built-in master/slave switch detection module, supports automatic switching to backup power input within 0.3 seconds when network is disconnected or the device fails;
• Equipped with 1-channel 100V constant voltage backup power input, can form a highly reliable campus broadcast system with one-master-multi-slave, multi-master-one-slave configuration;
• The cooling fan adopts intelligent temperature control management: low speed at low temperature, automatically increasing speed as temperature rises, effectively extending the service life of the fan;
• Standby power consumption of the whole machine is less than 10W, meeting national environmental protection and energy-saving certification requirements;

Technical Specifications

• Network Interface: Standard RJ45 input;
• Supported Protocols: HTTP, HTTPS, UDP, TCP/IP, RTP, RTSP, RTMP, MQTT, FTP, SIP;
• Audio Format: mp3, wav;
• Total Harmonic Distortion: ≤0.5% (at 1/3 power);
• Audio Mode: 16-bit stereo CD quality;
• Sampling Rate: 8K - 48K;
• Bit Rate: 8K - 320Kbps;
• LINE OUT Output Level: 775mV, 2-position RCA jack;
• LINE OUT Output Impedance: 470 Ω;
• AUX Input Sensitivity: 300mV (unbalanced);
• MIC Input Sensitivity: 10mV (unbalanced);
• EMC Input Sensitivity: 300mV (unbalanced);
• Standby Power Consumption: <10W;
• Frequency Response: 90Hz~15KHz;
• Output Mode: 4-16Ω fixed impedance output, 70V/100V constant voltage output;
• Protection Circuit: DC output, overload, over-temperature, short-circuit protection;
• Ambient Temperature: -20℃ ~ 60℃;
• Ambient Humidity: 20% ~ 80% relative humidity;
• Input Power: ~AC100~250V, 50\60Hz;
• Product Size: 48532590mm;
• Packaging Size: 520420185mm;
• Net Weight: kg;
• Gross Weight: kg;