I guess what people seem to get concerned about is, now it's 250watts to two speakers, then 250 watts to 4 speakers, so the 210 is working harder.
However, I guess as the 210 is already set up to take 350 watts, it will handle it.
Curious though, would the actual db's coming out of one of the 210 speakers be double of what is coming out of one of the 410 speakers?
I assume total volume from each cab will balance as they are getting the same wattage in the end.
Just trying to wrap my head around it.