Spec Sheet

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S m a r t R e s e a r c h L t d.
External Sidechain High Pass Filter 'Split' cable:
This cable rolls off low frequency signals below 150H'z feeding the external sidechain input, to
reduce compression slightly at low frequencies, but without effecting the audio signal path.
Connection:
One cable is used for each channel. The normal input signal is connected to the female XLR, and
the 'straight through' male XLR is connected to the C2's input. This allows operation as normal.
The 'High Pass s/c ip' male XLR is connected to the C2's 'External Sidechain Input'. This is a filtered
copy of the normal input. When'External s/c' is now selected with the front panel switch, the new
filter is engaged, and if deselected the C2 runs as normal.
To use the filter in line with a different External Sidechain source, simply disregard the 'straight
through' XLR connection.
Specification:
Note that for the following filter performace, the 'High Pass s/c ip' cable is designed to feed an
Sidechain input with impedance of 10k Ohms from each XLR pin to ground. (as in the C2
Compressor). Lower impedance inputs will result in a higher corner frequency, and vice-versa.
Corner frequency: -3dB point 150Hz
Slope: -6dB/Octave
External Sidechain input impedance: 10k Ohms from each leg to ground.
Normal Input is wired one to one (pass-through).