deterioration of performance. Some higher-end recorders featured heads made from ferrite, which features excellent electro-acoustical properties while being a very hard material that resists wear. Its two main disadvantages are that it is brittle and easily damaged, and that it has a much higher noise output due to the Barkhausen effect. In more recent years, more exotic materials have appeared, some involving ceramics, which offer the best of both traditional materials.

Cleaning

With

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