The NAD C 555 is a high-performance integrated amplifier from the renowned audio brand NAD. It offers exceptional sound quality, advanced features, and versatile connectivity options. Some of its notable features include:1. HybridDigital technology: This cutting-edge technology combines the best of traditional analog and high-resolution digital audio to deliver unparalleled sound quality. The NAD C 555 supports playback of digital audio files up to 24-bit/192 kHz via USB and offers multiple digital inputs, including Coaxial, Optical, and AES/EBU.2. DirectDigital amplifier: The DirectDigital amplifier technology offers crystal-clear sound with extremely low distortion, noise, and fluctuation levels. This results in an immersive, dynamic, and balanced listening experience.3. Bass EQ: The C 555 features a bass management system that allows you to customize the bass response to suit your preferences. You can adjust the subwoofer crossover frequency and output level to fine-tune the sound for your specific speakers and room conditions.4. High-Current Power Supply: The amplifier's advanced power supply provides ample current on demand, delivering dynamic and detailed performance through your speakers.5. User-friendly interface: The intuitive front-panel controls and clear display make it easy to adjust all the necessary settings. The amplifier also features an IR input with learning functionality, enabling remote operation using compatible devices.With all these features and its sleek design, the NAD C 555 is a top contender for users seeking high-fidelity audio performance and advanced connectivity capabilities in an integrated amplifier.