Microphone preamplifier.


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The m501 is a 500 series module version of the m101 mic preamplifier. This circuit has been designed to capture audio with as little coloration or distortion as possible. It is a balanced, transformerless design with 48V phantom power, a 75Hz HPF and a ¼-inch HI-Z instrument input. It features a ribbon mic mode, which raises the mic input impedance, bypasses the input decoupling capacitors and deactivates 48V phantom to protect ribbon mics from damage, but it can be used with any microphone. The m501 comes with a five-year warranty on parts and labour.

• 12 position gold plated rotary gain switch

• Output line driver amplifier and HPF amplifier

• Ribbon mic mode

• 10-75dB gain range

• Output connectors: XLR balanced, TRS balanced and ¼-inch unbalanced