product description SONIC-PRO® once again brings Germany's energy conservation and environmental protection technology achievements to China. The performance of SONIC-PRO® D series digital power amplifiers has reached a level not reached by similar products. Its 1U rack structure design and high fidelity performance The power output of Heyan has been highly recognized and praised by professionals. In addition, full-featured software control and network systems are widely used in all parts of the world. Because of the leading technology of SONIC-PRO®, many large-scale rental companies and various venues that require professional sound reinforcement now use SONIC-PRO® products as their first choice. Features Advanced switching power supply technology and Pulse Width Modulation (PWM) technology can provide speakers with high-quality sound effects and continuous power. Over 95% of conversion efficiency and higher work efficiency have truly achieved the goals of energy saving and environmental protection, and reduced power consumption. Power factor correction technology, very low power consumption and wider operating voltage, more stable working status; low noise axial variable speed fan; comprehensive protection circuit including: DC, infrasound, high frequency, limiting, overheating, Short circuit protection; small size, light weight, compact size, all models only 1U rack. Applications Conferences, multi-purpose halls, lecture halls, schools, churches, stadiums, theme parks, multi-purpose applications, etc. D-202 Two Channel Digital Power Amplifier Technical Parameters: Rated output power: 8Ω stereo 200W×2 Rated output power: 4Ω Stereo 350W×2 Rated output power: 2Ω stereo 500W×2 Rated output power: 8Ω bridge 600W Signal to noise ratio: >107dB (A weighting) Input sensitivity: 1.25V Amplifier circuit: Class D Total chopping distortion (20Hz - 20KHz, 8Ω load): <0.1% Channel separation (1KHz 8Ω): >85dB Frequency response range: 20-20KHz, ±0.5dB Damping coefficient (1KHz 8Ω): >400 Input impedance: balanced 20K ohms, unbalanced 10K ohms Input connection method (each channel): XLR Output connection (each channel): Four-core speaker square Remote control: The amplifier has a remote control port, which can communicate with the audio matrix processor and other devices in the brand, and achieve wired and wireless remote control of the power amplifier Protection Circuits: Inrush Current Limiter, Power Switch Protection Circuit, Temperature Detection, Output DC Protection, Temperature Control SOA Protection, Smart Power Supply Protection Cooling: temperature-controlled axial-flow variable-speed fan, ventilation from front to back Size (width × depth × height): 485mmx260mm × 44mm Net weight: 3.5kg D-302 Two Channel Digital Power Amplifier Technical Parameters: Rated output power: 8Ω Stereo 300W×2 Rated output power: 4Ω stereo 500W×2 Rated output power: 2Ω Stereo 960W×2 Rated output power: 8Ω bridge 800W Signal to noise ratio: >107dB (A weighting) Input sensitivity: 1.25V Amplifier circuit: Class D Total chopping distortion (20Hz - 20KHz, 8Ω load): <0.1% Channel separation (1KHz 8Ω): >85dB Frequency response range: 20-20KHz, ±0.5dB Damping coefficient (1KHz 8Ω): >400 Input impedance: balanced 20K ohms, unbalanced 10K ohms Input connection method (each channel): XLR Output connection (each channel): Four-core speaker square Remote control: The amplifier has a remote control port, which can communicate with the audio matrix processor and other devices in the brand, and achieve wired and wireless remote control of the power amplifier Protection circuit: Inrush current limiter, power switch protection circuit, temperature detection, output DC protection, temperature control SOA protection, intelligent power supply protection. Cooling: temperature-controlled axial-flow variable-speed fan, ventilation from front to back Size (width × depth × height): 485mmx260mm × 44mm Net weight: 3.5kg D-402 Two Channel Digital Power Amplifier Technical Parameters: Rated output power: 8Ω stereo 400W×2 Rated output power: 4Ω Stereo 650W×2 Rated output power: 2Ω stereo 1100W×2 Rated output power: 8Ω bridge 1100W Signal to noise ratio: >107dB (A weighting) Input sensitivity: 1.25V Amplifier circuit: Class D Total chopping distortion (20 Hz - 20 kHz, 8 Ω load): <0.1% Channel separation (1K Hz 8Ω): >85dB Frequency response range: 20-20kHz, ±0.5dB Damping coefficient (1K Hz 8Ω): >400 Input impedance: balanced 20K ohms, unbalanced 10K ohms Input connection method (each channel): XLR Output connection (each channel): Four-core speaker square Remote control: The amplifier has a remote control port, which can communicate with the audio matrix processor and other devices in the brand, and achieve wired and wireless remote control of the power amplifier Protection circuit: Inrush current limiter, power switch protection circuit, temperature detection, output DC protection, temperature control SOA protection, intelligent power supply protection. 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