The Marantz HD 400 is a high-quality audio and video amplifier designed to deliver pristine sound and visual performance. It typically features advanced circuitry and components that ensure optimal audio fidelity and dynamic range. This device is capable of decoding various audio formats, making it versatile for different types of media and sources. The design aesthetic reflects a blend of modern technology with classic Marantz styling, often including a sturdy chassis and intuitive controls. Features may include multiple input options, built-in DACs for digital audio sources, and various connectivity options including HDMI, USB, and analog inputs. It also supports various audio formats such as stereo, surround sound, and high-resolution files, catering to audiophiles and casual listeners alike. The accompanying remote control provides ease of use, allowing users to switch input sources and adjust settings conveniently.