Marantz M4U - USB Computer Microphone The Marantz Professional M4U is an electret condenser microphone system designed to be used with a personal computer.  The system incorporates a USB A/D converter with a headphone output so the user can monitor the microphone pickup in real time without latency.  Perfect for podcasting, live streaming, interviews or any computer application requiring a microphone.  Type: Electret condenser Polar Pattern: Cardioid Frequency Response: 70 Hz - 16 kHz Sensitivity: -38 dB ± 3 dB (0 dB + 1 V/Pa @ 1 kHz) Output Impedance: 150 Ω ± 30% (@ 1 kHz) Load Impedance: ≥ 1000 Ω Self Noise: 18 dB A Max SPL: 136 dB (@ 1 KHZ ≤ 1 % T.

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D.) S/N Ratio: 76 dB Weight: 0.56 lb (252g) microphone only Dimensions: 1.89” diameter x 7.28” (48 x 185mm) microphone only