The preamp cannot drive a speaker. It is designed to be recorded or drive a power amplifier that drives a speaker.When I talk very close to the mic, using your preamp ckt the sound quality is good even I am not using any power amplifier.
You do not understand about acoustical feedback howling where the mic can hear the speaker and sounds go around and around.Any suggested preamp & power amplifier combination circuit, so that I talk at least 1M away from mic.
Look at the voltage noise numbers on their datasheets. The numbers are 18, 4.5 and 4.0 where the lowest number has less noise.ok.
Which one is better among the TL071, LM833, NE5534 amplifiers?
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