vanalstine fet valve amplifiers

I use a Primare pre with mine. Sound is excellent.

I ran mine with Platinum Audio Solo and Audio Physic Avanti Century III speakers and it sounded really good.

I subsequently had the amp modified to balanced outputs and upgraded wiring and internal parts (Jospeh Chow, Audio Horizions)and that took it to another level. The pre-amp I've mostly used with it has been a heavily modified tube Air Tight.

Right now I use this amp in a biamp configuration driving the bass drivers of Emerald Physic speakers. Same pre-amp and the sound is excellent.

Appreciate the responses. Gives me some good options to think about.

My Ultra 550 is paired with a Malpetree Audio 2A SE and driving my soft-dome tweetered EgglestonWroks Fontaines. The sound is clear and well-balanced top to bottom. Very powerful with no distortion. I have upraded tubes in both the amp and pre to my liking (fuller sound).