The Sonic T-amp ran the Audio Note K/Spe fairly well - this speaker is 90db sesntive though where it was positioned I would susect closer to 87db, The AN K is actually tougher than the speaker you note because the K is a 6 ohm speaker (min impedence not mentioned but it's lower than 6). The K was in a room too big for it and the SOnic Impact played to more then sufficient volume levels. The sonic Impact I heard was rated as 5 watts.

I was not overly impressed with the sound (it was modified and runs about $300.00) but for the money it was certainly good enough. Everyone in the room including the fellow who brought his over $1000.00 Musical Fidelity agreed that the SI sounded considerably better than his MF. So how you view the SI will depend on the relative experience you;ve had listening to pricey amps. The SI could seem like a giant killer (which I suppose in our session it would be tough to argue against -- I also felt it was every bit as good (but different) than a Celeste rig that was brought to the session). Though with the tougher to drive Gershman speakers my opinion would change.