Hello Fryette. I have been reading your user manual, but can´t find any definite answer to this question …
When a Tube Amp and the Power Station is connected by a speaker jack cable, and both are in a NON STANDBY state …
If for some reason the Power Station is turned OFF (not set to standby), do the Power Station still presents a DUMMY LOAD to the Tube Amp as a safety feature?
Let’s call this OPERATE mode: your amp sees the Power Station’s reactive load and the Power Station drives your speaker.
If someone trips over the power cable to the Power Station and it goes instantly from OPERATE to OFF. Your amp will not notice a difference. It will still see the same reactive load. Nothing will change.