Yamaha CL1 Reference Manual page 148

8.
To remotely control the external HA from
an input channel of the CL series console,
use the Bank Select keys to access the
OVERVIEW screen that includes the
channel on which you want to control
the HA.
9.
Press the GAIN/PATCH field of the channel on which you want to control the
external HA. The GAIN/PATCH popup window will appear.
10.
Press the PATCH button, and select the input port assigned to the external HA.
With these settings, you will be able to use the external HA in the same way as the head amp on
the I/O device or the CL unit. For details about the GAIN/PATCH popup window, refer to
"Making HA (Head Amp) settings" on
GAIN/PATCH field
page 30.
148
I/O device and external head amp
Reference Manual