the Sonic Frontiers Power 2 110w stereo or Power 3 220w mono amps for a couple reasons.
If you read the review technical/measurement section in Stereophile (where they earned class A recommendation), you will see John Atkinson say it was one of the few tube power amps he could use to evaluate different loudspeakers.
The reason is low output impedence, which equates to a high damping factor, and flat frequency response even with reactive loads.
They are built like tanks, user friendly, dependable, sound amazing, and are at super prices right now so you can get a new one that has a factory warranty and new tubes for the price of a used lesser amp that may be used, no warranty, and wasted tubes.
No matter what...with electrostats, ribbons, or just speakers that are a pain in the ass, they cruise right through.
If you read the review technical/measurement section in Stereophile (where they earned class A recommendation), you will see John Atkinson say it was one of the few tube power amps he could use to evaluate different loudspeakers.
The reason is low output impedence, which equates to a high damping factor, and flat frequency response even with reactive loads.
They are built like tanks, user friendly, dependable, sound amazing, and are at super prices right now so you can get a new one that has a factory warranty and new tubes for the price of a used lesser amp that may be used, no warranty, and wasted tubes.
No matter what...with electrostats, ribbons, or just speakers that are a pain in the ass, they cruise right through.