UK-based manufacturer Vision is now shipping a more powerful version of their AV-1700 classroom/meeting room amp.
The AV-1700+ has all the same inputs - 4 x line-level, 1 x balanced XLR mic with phantom - and outputs, but it has a super-charged digital amplifier for large room applications such as lecture theatres, small churches, and large meeting rooms.
The low-impedance digital amplifier has an output of 2 x 100 Watt RMS @ 8 ohms. It comes with an IR remote control and can be controlled via RS-232.