The red 550/551 Microphone Ensemble from MXL features two professional-quality microphones suitable for recording vocals and instruments. The 550 large-diaphragm mic is a robust vocal condenser mic and the 551 small-diaphragm mic can be used with a variety of instruments. Each mic has a pressure gradient condenser capsule with a cardioid pickup pattern for off-axis noise rejection. The mics also contain internal Mogami wiring for high-quality connections and a high SPL capability, allowing the mics to record loud sources without distortion. Each mic works through 48V of phantom power and has a wide frequency range of 30 Hz to 20 kHz.