The Type II Chrome Bias Audio Cassette

A classic blast from the past, in the shape of a mid 1980s BASF CR-E II cassette. A real chromium dioxide formulation, and for many, the epitome of the high bias tape.

The Type II high bias audio cassette is actually much older a development than many people realise. The rise of the Type II tape is generally associated with the 1980s, but in fact, it was introduced, with a chromium dioxide (CrO2) tape formulation, at the dawn of the 1970s.

Chrome tapes were, technically, a big advancement from the start. Du Pont’s chromium dioxide formulation gave an undeniable increase in high frequency response over the often rather muffled tone of the existing Type I ferric cassette. This meant much better definition – a major improvement in fidelity, and an ability to preserve all the zing and sparkle at the treble end of the original sound.

1993 TDK AR60 Type I Audio Cassette

The TDK AR60 was one of the better Type I audio cassettes. The sound from Type I tapes could vary enormously, going from a woolly blob of poorly defined warbling at the low end of the market, up to a frequency-rich and high fidelity experience in the more expensive echelons. Not that Type I cassettes could ever be described as expensive in themselves, but if you used a lot of them and bought in bulk, there’d be a dramatic difference in price between a batch of low end Type Is and the high end alternatives.

Belinda Carlisle – Heaven on Earth Audio Cassette (1987)

For some reason, the solo career of ex-Go-Gos singer Belinda Carlisle always made me think of Feargal Sharkey – the ex-Undertones singer whose solo work had taken off slightly earlier in the decade. They were both characters from the late ’70s alternative (punk-orientated) rock scene, with a similar rapid vibrato in their voices, who turned to the mainstream in the middle of the 1980s and stormed the UK charts in major fashion.