Here is a followup to my post from a few days ago. I've now listened to the Musician III single amp, biamp, and monoblock. Here are my impressions in comparison to my previous amps (entry-level Class D monoblocks, which I will refer to as 'the old monos'):
One Spectron amplifier only: Similar to my old monos (with >1000 hours of use). The single Spectron had more natural and brilliant highs and better overall dynamics and power than the old monos. The old monos had slightly fuller and warmer midrange. I'm told that the Spectron midrange will be changing and improving by 300-500 hours.
Two Spectron in biamp configuration: Very similar to one Spectron amplifier.
Two Spectron in monoblock configuration: Big difference! It sounds like I am using bigger speakers and more sensitive speakers. Notes are more forward, more defined, fuller, and more detailed from attack to decay. Soundstage is expanded in width and depth. Dynamics are increased, and crescendos are more powerful. Also higher frequencies are more brilliant and lifelike than the old monos. I had chills again, which I never had with the old monos.
One Spectron amplifier only: Similar to my old monos (with >1000 hours of use). The single Spectron had more natural and brilliant highs and better overall dynamics and power than the old monos. The old monos had slightly fuller and warmer midrange. I'm told that the Spectron midrange will be changing and improving by 300-500 hours.
Two Spectron in biamp configuration: Very similar to one Spectron amplifier.
Two Spectron in monoblock configuration: Big difference! It sounds like I am using bigger speakers and more sensitive speakers. Notes are more forward, more defined, fuller, and more detailed from attack to decay. Soundstage is expanded in width and depth. Dynamics are increased, and crescendos are more powerful. Also higher frequencies are more brilliant and lifelike than the old monos. I had chills again, which I never had with the old monos.