Black Diamond Headphone Amplifier, Part 1

There are basically three methods of increasing signal voltage in an amplifier. The two most common are using transistors and tubes. Within those, there are obviously myriad different topologies and circuits. However, the third method, step up transformers, is much less commonly used. The only place they commonly show up are after moving coil phono cartridges, and low output microphones. And then only in quite expensive systems.

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