Electro-Voice N/D457 User Manual

Details the N/DYM magnet, large diaphragm, sensitivity, low noise, hum-bucking coil, shock mount, and pop filter for superior sound quality.

Covers frequency response for close/far use, polar pattern, open circuit voltage, sensitivity, dynamic range, and output noise.

Details impedance, weight, and dimensions including height, diameter, and shank size of the microphone.

Explains tuning for off-axis rejection, gain-before-feedback, proximity effect, and use in humid/temperature extremes.

Describes rigorous inspection and computer-controlled testing ensuring performance parameters meet or exceed standards.

Covers malfunction for two years from purchase and unlimited time against acoustic system defects due to workmanship.