PSA: Using power amps in mono

[JMMP]

Just poking around the Mesa website and reread their guide for using Mesa power amps in mono. Historically, as I recall, the advice was to turn the unused channel's volume all the way down, and the presence all the way up to prevent oscillations. It appears that is now changed to have both controls turned all the way down. From their website:

Stereo Power Amps Used Mono
Any Boogie power amp can be used in mono by connecting the input and speaker to one side only. The input and speaker of the side not in use cannot be connected or damage may follow. As with any tube amplifier, a load of some sort must be connected if there is signal at the input. Always make sure to connect the speaker to the appropriate side receiving the input signal, and make sure the speakers are connected to the matching impedance jack on the amp. As an extra precaution, the volume and presence of the side not in use should be turned all the way down as well. All current production Boogie power amps are not bridgeable, but can safely be used in mono under the above conditions. We suggest alternating sides that will be used in mono applications to provide even tube wear from side A to Side B.