The Marantz 4400 is a vintage quad receiver that was popular in the 1970s. Designed to provide both detailed sound and versatility, it supports 4-channel audio, making it compatible with early quadraphonic sound systems. The unit features a powerful amplifier section delivering 100 watts per channel into 8 ohms. It has multiple inputs for various audio sources, including phono and tape, and supports AM/FM radio tuning. The 4400 includes the option for connecting external speakers and has a discrete four-channel output, catering to audiophiles who desired stereo sound with an immersive experience. Its build quality is robust, typical of Marantz products from this era, featuring a distinctive blue illuminated dial and multiple control knobs for fine-tuning sound settings. The receiver also has a built-in Dolby decoder, enhancing playback quality for compatible media. In terms of dimensions, it measures approximately 17.5 inches in width, 5.5 inches in height, and 15 inches in depth, weighing around 45 pounds. This combination of power, flexibility, and aesthetic appeal has made the Marantz 4400 a sought-after component among vintage audio enthusiasts.