“At the risk of sounding like an infatuated teenager, the sound was awesome.”
Jason Serinus gives a hint as to what he thought of the new Progression M550 Mono Amplifiers in Stereophile Magazine, Nov 2021 issue.
“For anyone who values colorful and glowing amplification that brings natural timbre and the subtlest of details and dynamic shifts to the fore while supplying a breathtakingly full measure of big-picture dynamics, slam, and top-to-bottom frequency response, the Progression M550s must be heard. They are wonderful amps.”