UPDATE: used the FR-10 at band rehearsal last night, classic rock covers band.
For most of the night the band was very loud, like in earplug territory. I ran my FM3 out 2 (+4 dBu, ran at about 2 o'clock on the FP OUT2 control) into the FR-10 and needed to set FR-10 volume to a little over 2 o'clock to keep up with the band when using quieter presets (I really really need to go through them and level them better with the FR-10!) but keep up it did. When the band finally turned down around 3/4 of the way through rehearsal it became way too loud, dialed it back under noon and ran down the FM3 out2 level down to noonish as well.
No shortage of low end, in fact it was quite boomy at first, needed to turn down the bass level to around 10 o'clock, it was really resonating with the stage floor. And again, I don't have any noticeable hiss out of the unit. Very impressed. And bandmates were also impressed.
Looking forward to using it at our next gig. This thing is going to give my Quilter TB202/BlockDock 12HD a run for it's money, lemme tell ya...