SM-8B Studio High rear microphone electret condenser transducer high sensitivity and low noise preamplifier Integrated circuit for unsurpassed sound quality wide frequency response range Power LED & bull; Sensor Principle: electret condenser & bull; Directional characteristics: cardioid & bull; The frequency response of 30 Hz-20 kHz & bull; Sensitivity: -38 dB & plusmn; 2 dB (0dB = 1 / Pa at 1 kHz) & bull; Output Impedance 200 Ohms & plusmn; 30% (at 1 kHz) & bull; Load Resistance: & ge; 1 000 & Omega; & Bull; The equivalent noise level: & le; 22 dB A (IEC 581-5) & bull; Max. SPL inlet 140 dB (THD & le; 1,0% at 1 kHz) & bull; Power Requirements: Phantom Power 48 VDC. & Bull; body dimensions: & Oslash; 54 x 128 mm & bull; Net Weight: 371 g