Help rotel pops when turning on and off

I have an old Sansui receiver that does the same thing. I put a larger wattage resistor across the "B" speaker leads, then before I turned it off, I just switched to the "B" speakers. When I power it up, it's on the "B" speakers, the load is absorbed by the resistors, then I switch to the "A" speakers, where my speakers are hooked up. Never a pop!

Is it critical to provide the amp a load on speaker b, or can I just switch it to b no worries?

???? soooo?

Its fine for that amp but not for all.