The Sanyo RD-311 is a cassette tape deck manufactured by Sanyo between 1978 and 1980 in Japan. It features a sleek design available in silver or black. The unit does not support remote control and has a power consumption of 30 watts. Its dimensions are 420 mm in width, 150 mm in height, and 315 mm in depth, weighing approximately 5 kg. The RD-311 is equipped with a combination head consisting of two audio heads for recording and playback and a ferrite erase head. It operates at a tape speed of 4.75 cm/s. The device supports Normal (Type I) and Cr02 (Type II) tape types. In terms of frequency response, it is rated from 30 Hz to 14 kHz for Type I tapes and 30 Hz to 17 kHz for Type II tapes. The total harmonic distortion factor is 1.5%, with a signal-to-noise ratio of 54 dB without Dolby and 64 dB with Dolby noise reduction. The unit has Dolby crosstalk attenuation capabilities and a cancellation attenuation greater than 70 dB. The pre-magnetization frequency is set at 100 kHz, and the rewind time for a C-60 cassette is around 90 seconds. The device includes two microphone inputs located on the front panel. It has several input and output connections, including line inputs and outputs, along with a headphone output. This cassette deck is compatible with several amplifiers and corresponding tuner models from the same series, specifically the Sanyo DCA and FMT series.
