I play in a heavy Drop C band with 2 loud guitarists and hard hitting drummer ..... Volumes no problem at all with the R-400 ( no struggles), obviously cabs can play a part ( I use a 6x10)
As been said in this thread....I was initially concerned about the apparent lack of eq before I got one, it's very good and versitile .mixing it up with the drive or clean ,contour bright button gives it plenty of very usable different sounds.
It just cuts through wonderfully.still amazed by it