FYI - I had a rehearsal last night using a F1X + QSC PLX 1202 bridged mono (allegedly 1200W into 4 ohms) + B2. It was plenty loud - won the arm's race - was able to enforce mutual disarmament (i.e. everybody turn down). But the clip light flickered ocasionally when I really hammered it (playing with pick)
The PLX2402 gets good wraps in Talkbass driving 2 B2s.
I did a couple of gigs last week with a PLX3402 (1100wpc into 4 ohms) driving a B2 and B4 stacked. That was very nice.