User Guide

The resistors 2 x Rv must have a tolerance not exceeding 0.5 % in order

to satisfy the symmetry requirement.

Standardized values for Rv and 2 x Rv:

+ UB Rv 2 x Rv

12 V ± 2 V 680 ohms 330 ohms

24 V ± 4 V 1200 ohms 680 ohms

48 V ± 4 V 3300 ohms 6800 ohms

Phantom powering with unbalanced inputs

If only single ended (grounded) amplifier inputs or no input transformers

are available, either capacitors or optional transformers must be wired

into the audio lines to prevent leakage currents from entering the input

stage.

Specifications:

Transducer Principle: condenser transducer, prepolarized

Polar Pattern: cardioid

Frequency Range: 20 … 20,000 Hz ±3 dB

from published curve

Sensitivity at 1,000 Hz: 7 mV/PaⳎ–0.7 mV/µbar

(–63 dBV, re 1 µbar)

Electrical Impedance: 200 ohms, ±20 % balanced

Recommended Load Impedance: 

600 ohms

Hum Sensitivity (at 50 Hz): 4 µV/5 µT

Equivalent Noise Level acc. to

DIN 45412 (A-weighted): 21 dB-A