There are 2 proximity effects (when mic is close to mouth), one the increases bass and the other that increases treble called the obstacle effect
Natural sound from vocal cords to brain of listener for a Mexico made SM58 next to mouth were obtained as follows:
SM58 was shunt with 19.5mH ! i.e. low cut at 1.6KHz and 15nF shunt to the Pleiades V4 (EF183 pre preamp with 4 AA batteries) output to reduce treble boost, sibilants, saliva noise (sometimes desirable). Added advantage is the reduction of any hiss left and rounding waveform curves should instantaneous peak limiting occurs at the electron tube, thereby preserving subjective volume due to natural harmonics produced while objectively limiting the signal.
Signal path used:
Voice - SM58 - Pleiades 1:7 input transformer, 19.5mH primary L - V4 (+ve bias from plate to grid) - 15nF across output - Realistic Disco mixer mic in - pad before headphones - Sennheiser HD560 - ears - brain
Natural sound from vocal cords to brain of listener for a Mexico made SM58 next to mouth were obtained as follows:
SM58 was shunt with 19.5mH ! i.e. low cut at 1.6KHz and 15nF shunt to the Pleiades V4 (EF183 pre preamp with 4 AA batteries) output to reduce treble boost, sibilants, saliva noise (sometimes desirable). Added advantage is the reduction of any hiss left and rounding waveform curves should instantaneous peak limiting occurs at the electron tube, thereby preserving subjective volume due to natural harmonics produced while objectively limiting the signal.
Signal path used:
Voice - SM58 - Pleiades 1:7 input transformer, 19.5mH primary L - V4 (+ve bias from plate to grid) - 15nF across output - Realistic Disco mixer mic in - pad before headphones - Sennheiser HD560 - ears - brain
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