What are the default settings for the Class CA-301 amplifier?
The default setting is LINE, meaning normal asymmetrical inputs.
How can I use the amp with a preamp with symmetrical outputs?
If the amplifier is set to ASYMMETRIC LINE, switch the LINE/BALANCED selector to the BALANCED position after turning off the amp.
How can I activate MONO mode on the amplifier?
To activate MONO mode, turn off the amplifier, then place the STEREO/MONO selector to MONO. If the amplifier was not turned off at the time of this modification, turn it off, wait 10 seconds, then turn it back on to activate the MONO function.