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Highlights:• 4-channel Class D PA amplifier with high efficiency• 4 x 50 W output power for powerful sound • Silent operation with a fanless cooling system • Low heat dissipation significantly reduces cooling requirements • Mute and level control for each channel • LED indicators for clip and protection per channel pair • Short circuit protection for safe operation • Operates on mains power or 24 V emergency power Efficient and Silent 4-Channel PA AmplifierThe PA-1450D is a powerful and energy-efficient 4-channel Class D PA amplifier designed for professional audio applications. With a total output of 200 W (4 x 50 W), it delivers reliable sound with low heat dissipation, reducing the need for external cooling. The fanless design ensures silent operation, making it ideal for noise-sensitive environments. Each channel features mute and level control for precise sound adjustment. LED indicators display clip and protection status, giving users full control over amplifier performance. For added flexibility, the PA-1450D can be powered via standard mains electricity or a 24 V emergency power source, making it suitable for both fixed and mobile installations. Safety features such as short circuit protection and overload protection ensure stable operation under all conditions. A versatile and reliable solution for everything from conferences and commercial sound installations to emergency notification systems where stable sound amplification is crucial.Specifications:• Power output: 4 x 50 W• Class D technology for high efficiency • Output impedance: 4 Ohm, 70/100 V • Frequency range: 10-20,000 Hz • Signal-to-noise ratio: 63 dB • Total harmonic distortion (THD): < 0.5% • Inputs: 1 V/20 kOhm (unbalanced), 550 mV/20 kOhm (balanced) • Power supply: 230 V AC / 24 V DC emergency power • Power consumption: 300 VA • Operating temperature: 0-40 °C 
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