AKG C535EB Bedienungsanleitung Seite 18

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
12 V ± 2 V
24 V ± 4 V
48 V ± 4 V
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:
Polar Pattern:
Frequency Range:
Sensitivity at 1,000 Hz:
Electrical Impedance:
Recommended Load Impedance:
Hum Sensitivity (at 50 Hz):
Equivalent Noise Level acc. to
IEC 60268-4 (A-weighted):
18
Rv
680 ohms
1200 ohms
3300 ohms
condenser transducer, prepolarized
cardioid
20 ... 20,000 Hz ±3 dB
from published curve
7 mV/Pa –0.7 mV/µbar
(–63 dBV, re 1 µbar)
200 ohms, ±20 % balanced
600 ohms
4 µV/5 µT
21 dB-A
2 x Rv
330 ohms
680 ohms
6800 ohms