This paper describes an educational microphone preamplifier design (the “EMP”) intended to teach the basic concepts of electrical engineering that may be useful to students in undergraduate audio engineering and sound recording programs. The design is broken up into simple sub-circuit modules that can be built and tested as part of a laboratory section of a larger course when supported by a series of lectures on basic DC and AC circuit theory. In laboratory exercises, students may swap components within the included design to learn about the function of each sub-circuit. The combined sub-circuits provide students with a low-cost yet high quality microphone preamplifier.
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