1. High-efficiency Class D power amplifier with a height of 1U; 2. Built-in peak level limiter to protect speakers, with a clipping indicator light for reminder; 3. Equipped with auto-sleep function, automatically entering sleep mode when there is no signal input. It has comprehensive protection functions including soft start, DC protection, high-frequency protection, overvoltage protection, undervoltage protection, overload protection, short-circuit protection, limiter protection, overheating protection, etc. Surge protection: power input supports 1KV differential mode and 2KV common mode protection; power output supports 2KV common mode protection; 4. Stereo Output Power: 500W*2@8Ω; 5. Frequency Response Range: 20Hz-20KHz; 6. Input Sensitivity: 0.775V/1.414Vrms; 7. Input Impedance: 20KΩ balanced / 10KΩ unbalanced; 8. Voltage Gain: 36dB; 9. Signal-to-Noise Ratio (SNR): ＞100dB (A-weighted); 10. Total Harmonic Distortion (THD): ＜0.05% @1KHz, 1/3 power output; 11. Power Supply Adaptation Range: AC100V-240V/50Hz-60Hz; 12. Interfaces: 2-channel line input, 2-channel line output, 2-channel power output; 13. Power amplifier efficiency is as high as 92%, significantly reducing energy consumption and complying with ENERGY STAR green energy-saving concepts; 14. Power consumption after auto-sleep is ＜1W, meeting the energy-saving management requirements of public buildings (energy efficiency test report available); 15. Supports Link-Link cascading function, allowing multiple devices to synchronize input signals and simplify wiring of large-scale systems; 16. Power-on soft start time is ＜2 seconds, effectively suppressing inrush current and extending the service life of equipment and power grid; 17. Operating Temperature Range: 0℃ ~ +45℃, supporting 7×24 hours continuous operation in fixed installation scenarios; 18. Optional RS485 monitoring module for remote reading of temperature, load status and fault codes;