The DAV electronics BG No 501 is a 500 series microphone amplifier with DI Input.
The features of this microphone amplifier consist of low noise and low distortion. It offers switched gain controls for high accuracy level setting (4 dB steps), D.I. Input (high impedance), level indication, 26dB pads (switchable), phase reversal and 48v phantom supply (switchable).
Features:
Frequency response: 10Hz - 150KHz ± 0.25dB
Mic gain range: 22dB - 66dB in 4dB steps. [pad in -4dB - 40dB]
Distortion: Less than 0.01% Typ, 0.001% 1KHz @ +20dBu o/p