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Adding Phantom Power to Balanced Input Stages
Input transformer with center tap (floating).
Input transformer with no center tap (floating).
Standard values for Rv or 2 x Rv:
V
s
R
v
2 x R
v
12 V ±2 V 330 ohms 680 ohms
24 V ±2 V 680 ohms 1200 ohms
48 V ±4 V 3300 ohms 6800 ohms
In order to preserve symmetry, use 2 x Rv resistors with a maximum toler-
ance of 0.5% only.
If the amplifier inputs are single-ended (grounded) or have no input trans-
formers, wire either capacitors or optional transformers into the audio lines
to prevent any current leakage into the input stage.
Adding Phantom Power to Unbalanced Amplifier Inputs
Cleaning
To clean the metal surfaces, use methylated spirits or alcohol. We recom-
mend to wash the windscreen in a mild detergent solution. As soon as it is
dry, the windscreen will be ready for use again.
Standard Accessories
H 85 shock mount
W 4000 foam windscreen
Optional Accessories
6
For optional accessories, refer to the current AKG catalog or folder, or
visit www.akg.com. Your dealer will be glad to help.