The Microtech Gefell M 40 is a small-diaphragm condenser microphone capsule within the Generation 4 modular system. Featuring a cardioid polar pattern, it delivers a frequency response of 20 Hz to 20 kHz with 13 mV/Pa sensitivity and 100 Ohm nominal impedance. With an ultra-compact size (26 mm length, 21 mm diameter) and low self-noise of 14 dB(A), it handles SPL up to 146 dB at 0.5% distortion. Designed for professional applications, it requires 48V phantom power (4 mA) and pairs with MV 400 X (XLR) or MV 400 L (LEMO) preamplifiers. Its modular architecture enables rapid configuration changes for studio, broadcast, or field workflows, with a 132 dB dynamic range ensuring precision across diverse acoustic environments.