I see no issues, though I doubt your speakers can handle more than you are currently feeding them (unless you are using tubes).
Can one use 2 sets of monoblock amplifiers to one stereo set of speakers?
My preamp can output to two sets of monoblock amplifiers simultaneously. At present, only one set of monoblock amplifiers is connected to a pair of soundlab speakers. Are there any positive or negative outcomes if I connect both sets of monoblock amplifiers to one set of stereo soundlab speakers?