MP01 is an active series preamplifier. MP01 can be used in the following situations: when low-output dynamic microphones or passive ribbon microphones cannot provide you with the power you need, or when increasing the gain of the preamplifier or console will only add noise to the signal. Just connect your passive microphone to the input of MP01, then connect the preamplifier or mixer to the output of MP01. It provides a stable gain up to +26dB. MP01 is the perfect device to enhance passive microphone signals. With complex Class-A circuit design and specially selected FET, MP01 has very low self-noise among similar products. The balanced XLR connector ensures a clean signal even with long cables. The durable metal shell, compact and rugged structure and high-quality manufacturing standards ensure reliable operation even in harsh environment.