| 1. | Electro-Voice Microphone N/D 257B User Guide ElecfroT bice N D257B Cardioid Dynamic Vocal Microphone SPECIFICATIONS Frequency Response Close Response 35 to 19 000 Hz Far Response 65 to 19 000 Hz Polar Pattern Cardioid Open Circuit Voltage 2 2 mV pascal 1 000 Hz Power Sensitivity 53 dB 1 000 Hz 0 dB 1 mW pascai Dynamic Range 141 dB Equivalent Output Noise 17 dB 0 dB 0 0002 dynes cm Impedance 150 ohms balanced lo Z Weight 7 05 ounces 200 grams Dimensions Heig |
 |
||||||||||||