Dimensional Drawing; Frequency Response - AKG C 680 BL Mode D'emploi

Standard values for Rv and 2 x Rv:
VDC
330 Ω ±10%
12 V ±2 V
680 Ω ±10%
24 V ±4 V
3,300 Ω ±10%
48 V ±4 V
Important:
In order to satisfy the DIN 45596 symmetry requirement, make sure the
actual values of the two resistors 2 x Rv do not differ by more than 0.4%!
3.2.2. Unbalanced Inputs
If the equipment inputs are grounded or transformerless, wire either
capacitors or extra transformers into the audio lines as shown below in order
to prevent any current leakage into the input stage.
Fig.5: Retrofitting phantom power to unbalanced inputs.
4. Cleaning
Clean all exterior surfaces with methylated spirits or alcohol.
8
Rv 2 x Rv
680 Ω ±10%
1,200 Ω ±10%
6,800 Ω ±10%
5. Dimensional
Drawing

7. Frequency Response

6. Polar Diagram