Powering - AKG C414 LTD Bedienungsanleitung

L
Important!
Fig. 4: Circuit using
an input transformer
with a center tap
(floating).
Fig. 5: Circuit using
an input transformer
with no center tap
(floating).
Table 1: Feeding re-
sistor to DIN/IEC
20

2 Powering

The C 414 LTD provides extremely low self-noise yet high head-
room. The only way to meet these strict engineering requirements
was to limit the powering options for both microphones to 48 V
phantom power to DIN/IEC only. This standard requires a posi-
tive voltage of 48 V with reference to the cable shield.
Do not connect the microphone to any power supply other
than a phantom power source (input with phantom power or
external phantom power supply) to DIN/IEC with a floating
connector, using a balanced cable with studio grade con-
nectors to IEC 268-12 only. This is the only way to ensure
safe and reliable operation.
We recommend the following methods to add phantom power
to microphone inputs:
Standard values for Rv and 2 x Rv
V DC
48 V ±4 V
To satisfy the symmetry requirement, use resistors with 0.5%
maximum tolerance for 2 x Rv.
Rv
3300 ohms
2 x Rv
6800 ohms
AKG C 414 LTD