The Sanyo RD-400 is a cassette tape deck manufactured by Sanyo between 1982 and 1984. Designed to cater to audio enthusiasts, it features a robust structure with dimensions of 420 mm in width, 110 mm in height, and 220 mm in depth, weighing approximately 4 kg. The power consumption is rated at 12 watts. The device includes a variety of inputs and outputs, including line and microphone inputs, supporting different signal levels, ensuring versatility in connectivity. The audio heads setup consists of a permalloy head for recording and playback and a ferrite head for erasing, providing quality audio reproduction. The RD-400 utilizes a servo-controlled DC motor with a synchronisation fluctuation of just 0.05% WRMS, contributing to its precision. It supports various tape types, including Normal, Chrome, and Metal, with a wide frequency response ranging from 40 Hz to 18 kHz depending on the tape used. Signal performance metrics show a distortion factor of less than 1.0% and a signal-to-noise ratio of up to 75 dB when using metal tapes with Dolby C noise reduction. Additional features include auto-reverse functionality, a title search feature, and quick rewind times, making it a capable choice for audio playback and recording tasks.
