I second Angela100's suggestion of Wolcott amps (disclaimer - I'm a Wolcott owner & dealer). No, they won't double their power output going from 8 ohms to 4 ohms, and again into 2 ohms, like a beefy high-current solid state amp will. But, they will deliver their rated power into a 1.7 ohm load, which is pretty darn good for a tube amp. Especially for a tube amp that uses EL34 tubes, which are traditionally noted for their midrange performance, rather than their stability into difficult loads. But Wolcotts are the amplifier of choice of many Sound Lab owners, and Sound Labs are a difficult speaker to drive.
A feature of the Wolcotts that is quite welcome with demanding loudspeakers is the adjustable output impedance control, which allows the user to fine-tune the amplifier/speaker interface.
I'd be happy to answer any specific questions you might have.
A feature of the Wolcotts that is quite welcome with demanding loudspeakers is the adjustable output impedance control, which allows the user to fine-tune the amplifier/speaker interface.
I'd be happy to answer any specific questions you might have.