I drove a pair of series III 901's for many years (in my younger slightly more rockin' higher volume days-early 1980's) with a Marantz 2270 receiver (70 watt/channel which had pre out's main in's), with great success. I also later drove them with an Adcom GPP555/GFA 555 200watts per channel combo and the Marantz gave up very little to the Adcoms. You can ocassionally find a 2270 for $300-$400 on Audiogon in good shape and you will have a nice vintage piece to boot.
