Quad Bookshelf/Floorstands: It will drive quite well
QUAD Elecrostats: It can drive only in small room an high volume may not be possible
Dyn 42/52 : it can drive quite decently to substantial volumes (not very high)
They perform the Best with 85+ db sensitivity and where the load does not dip below 4 ohms..
Rating is 25 W into 8 ohms and 14 W into 4 ohms afger which it is a drastic fall.Being pure Class A do not compare this with an equivalent Class AB since the current capability is pretty High. eg it drives my speaker much better than a 50W int am i used to own.