The JM27 is a microphone in the tradition of classic studio microphones. It is a medium-sized diaphragm true capacitor microphone with a cardioid head. This feeds the FET type preamplifier for low noise. The output balancing is handled by a quality audio output transformer. The capacitor element is manufactured to the classic "concentric electrode" design which provides smooth extended frequency response. Quality is further enhanced by using dynamic feedback actually at the capacitor element. This original technique eliminates distortions which can occur when using this type of microphone for high volume levels. The capacitor membrane is microfine Mylar with gold sputtering, voltage polarized by phantom power. The microphone body is made of machined brass; Connection is via screened balanced audio cable with 3 pin XLR connectors.