Question about Shure 515SBG18X Professional Microphone
The impedance of these mics is around 180 ohms which means you would probably use a pot around 300 to 600 ohms and with an audio taper.
This is NOT a good plan from an engineering standpoint as adding impedance to the balanced mic can allow electrical noise pickup.
The only way to get high impedance is by use of a transformer or a preamplifier. You DON NOT want to run high impedance lines over any distance as they are more subject to noise pickup.
The transformer should be at the far end of the cable run from the microphone. KEEP the impeedance of the cable from the mic LOW until right before a high impedance input amplifier.
Posted on Sep 30, 2009
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Posted on Jan 02, 2017
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