Presented here in a matched-pair set, the Schoeps MK 4XP is a cardioid condenser microphone capsule designed for the very closest speech pickup with minimal coloration—directly in front of the speaker’s mouth. Its low-frequency rolloff is compensated by proximity effect. Thus it has (up to the point of its high-frequency emphasis) a flat frequency response for the speaker’s voice, while showing a rolloff (-10 dB at 100 Hz) for all sound that originates from a greater distance. As a result, background sounds are picked up less strongly than the person speaking.
Paired with the CMC 6 or CMR Colette microphone amplifier, the capsule gives you a 40 Hz to 26 kHz frequency response, but this extends all the way to 42 kHz when you pair the capsule with the CMC 6xt.