LD-SP-5704 is a lightweight, high-performance, Class D audio power amplifier manufactured by Loudity. It is designed to deliver up to 550 watts of power per channel and features a low-noise, low-distortion operation. The amplifier also features a switchable stereo/mono mode, which allows it to be used in a variety of applications. The amplifier is also capable of driving a wide range of speaker types including full-range, subwoofers and studio monitors. The LD-SP-5704 is a highly efficient, reliable and affordable amplifier and is a great choice for professional sound system applications from home theater systems to audio/visual packages.