1985 Sony HF-S 90 Audio Cassette

The Sony HF-S cassette was a normal bias Type 1, which was of a superior grade, and described by the manufacturer as Super High Fidelity. There was a big difference in sound quality between these tapes and the very basic ‘Low Noise’ range-proppers – although most high bias chrome tapes would still quite noticeably subordinate them in terms of frequency response.