Using Yamaha P5000S on Magnepan 1.7s:
http://www.yamahaproaudio.com/global/en/products/poweramps/ps_series/specifications.jsp
700wpc into 4 ohms. I think the room is about 12'Wx18'Lx8'H
http://www.yamahaproaudio.com/global/en/products/poweramps/ps_series/specifications.jsp
700wpc into 4 ohms. I think the room is about 12'Wx18'Lx8'H