There's a bit mor to it than that but I'd vote it'll be OK. The gain of the preamp and amp will come into play. Naturally the speakers eff is a consideration too.
At most what will happen is the volume knob might get turned up a bit more so. If the pre has 17db or better, and the amp has 20db or more, you ought to be fine I'd think aside from the knob going up some.
There's more info around here on just this topic take a look at this one:
http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1222315177&openmine&zzBlindjim&4&5#Blindjim
... there are more.
Good luck
At most what will happen is the volume knob might get turned up a bit more so. If the pre has 17db or better, and the amp has 20db or more, you ought to be fine I'd think aside from the knob going up some.
There's more info around here on just this topic take a look at this one:
http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1222315177&openmine&zzBlindjim&4&5#Blindjim
... there are more.
Good luck