I've been using the Markbass 1x12 combo for about a year now. 99% of the time play through PA support, so using it as stage monitor and for rehearsal. I have used it at one or two really small gigs stand alone and it held up fine. I got to play through a Little Mark III into 2 MarkBass New Yorker cabs at a recent outdoor gig with HUGE PA support. I pretty much just dialed in my gain and left the guys settings alone and I really couldn't tell much difference in tone between his set up and my combo.
One thing I will say is I get more compliments on my little MB combo amp's power, clarity, and tone from other musicians than any other amp I've played through before. I don't think they've ever seen such a small amp cut through the mix like this thing does. 27 lbs. and sits in the back seat of my Civic. Gotta love it. Yes, I will get an extension cab one day, but only cause I want it, but don't need it.
One thing I will say is I get more compliments on my little MB combo amp's power, clarity, and tone from other musicians than any other amp I've played through before. I don't think they've ever seen such a small amp cut through the mix like this thing does. 27 lbs. and sits in the back seat of my Civic. Gotta love it. Yes, I will get an extension cab one day, but only cause I want it, but don't need it.