I know that folks that are into Single ended triode set ups get by with pretty tiny amps, but those speakers are only moderately efficient and 12 w peak is not very much at all. Other questions of relevance are room size and speaker type. If they are full range they will need a lot more juice than if they are mini-monitors. My gut reaction is that you would have a hard time driving full range speakers to anything approaching realistic levels in an average size room, but for near-field, relatively low volume listening of non-orchestral, non-rock music in a small room, you might have a chance. Now recognize that I am not a tube amp expert at all, so take this with a grain of salt.
