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The Microphone Book, 2nd Edition by John Eargle

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CHAPTER 8

ELECTRICAL CONSIDERATIONS AND ELECTRONIC INTERFACE

INTRODUCTION

In this chapter we examine details of electronic performance of microphones and their interface with the following preamplifiers and consoles. Subjects to be covered include: remote powering, microphone output/preamp input circuitry, the stand-alone microphone preamp, microphone cable characteristics and interference, and overall system considerations. A final section deals with capacitor microphones operating on the radio frequency (RF) transmission principle.

POWERING

Most modern capacitor microphones operate on 48 V phantom powering (also known as “simplex” powering) provided by the preamplifier or console input module. The basic circuitry for phantom powering is shown ...

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