Phantom Power Disable - Shure SCM268 Manual

Channel
1
2
3
4
To select a particular corner frequency for the low cut filter, remove the R18, R28, R38, or R48 resistor for a given channel as
specified above.Then, in the corresponding pc board location (X17, X27, X37, or X47), place a capacitor of the specified value
(polarity does not matter). Refer to the following formula for selecting the correct capacitor value for the desired corner frequen­
cy.
C = 26.5/F
where:
C = value of capacitor in µF
F = corner frequency (-3 bB) for low-cut filter in Hz
The following table lists the low-cut frequency corners for some of the most common capacitor values:
Capacitor Value (µF)
.033
.047
.068
.1
.22
.33
.47
.68
1.0
2.2

Phantom Power Disable

To disable phantom power for a given microphone input, remove the specified resistor as listed in the following table:
Channel
1
2
3
4
Remove Resistor from:
R18
R28
R38
R48
Low-Cut Frequency Corner (Hz)
803
564
390
265
120
80
56
39
26.5
12
Remove Resistor:
R15
R25
R35
R45
Place 0µF to 33µF Capacitor in:
X17
X27
X37
X47
Shure Incorporated
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