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Class-a Fet Condenser Microphone

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ST51 CLASS-A FET CONDENSER MICROPHONE The ST51 is an affordable, true-condenser large diaphragm recording microphone with outstanding sound and construction. The ST51’s 6-micron, gold-evaporated Mylar diaphragm is optimized to capture definition and detail for both vocal and instrument recordings. Class-A FET circuitry provides unparalleled smoothness and warmth to your recordings. FEATURES • Cardioid Polar Pattern • Large 1” all brass capsule, hand assembled and oven baked for long term stable operation • Thin 6-micron gold-evaporated Mylar diaphragm provides sonic detail and accuracy • Custom-wound nickel core output transformer • Black nickel-plated all brass body • Stainless steel head and grille assembly • Requires 48V phantom power Includes: • HM-2 hard mount • Zipper case • Optional SM-4 shock mount available product SPECifications Preamp Class-A FET Polar Patterns Cardioid Frequency Response 20Hz - 18kHz High Pass Filter N/A Attenuation Pad N/A Sensitivity 30mV/Pa Maximum SPL 134dB Equivalent Noise 22dB SPL - A weighted Typical Load Impedance >500 Ohms Output Source Impedance 200 Ohms transformer isolated Dimensions 7.5” long, 1.8” max. dia. Weight 1.1 lbs. Power Phantom Power Copyright © 2010 Sterling Audio www.sterlingaudio.net K Frequency Response and Polar Patterns st51 cardioid +20 +10 MAGNITUDE dB 30° +5 dB -5 dB 60° 0 -10 dB -15 dB -20 dB 90° -10 120° -20 150° 180° 20 100 50 200 500 1K 2K 5K 10K 20K FREQUENCY Hz +5 dB 30° 30° 30° -5 dB 60° 60° -10 dB -10 dB -15 dB -15 dB -20 dB -20 dB 90° 120° 120° 120° 150° 180° 5K 2K 10K 5K 20K 10K 20K 125 250 60° 60° 90° 150° +5 dB 30° 30° -5 dB 60° 90° +5 dB 125 500 2501000 150° 90° 90° 120° 120° 150° 30° -5 dB -5 dB -10 dB -15 dB -15 dB -20 dB -20 dB 30° 60° 90° 60° 90° 120° 90° 120° 150° 150° 180° 2500 5000 +5 dB 60° -10 dB 150° 180° 500 1000 30° 2500 10000 5000 15000 125 250 120° 150° 180° 10000 15000 Copyright © 2010 Sterling Audio www.sterlingaudio.net 5 10