Hassel: I think it is like the different-focus effect found with 3D glasses - just applied to your ears instead.
BTW, I hear this same thing on other amps besides McIntoshes. Mcs have meters so you can see it as well as hear it for solid confirmation. Some recordings make it very noticible - especially late 70s ones - where even unrelieving amps make it audible.
BTW, I hear this same thing on other amps besides McIntoshes. Mcs have meters so you can see it as well as hear it for solid confirmation. Some recordings make it very noticible - especially late 70s ones - where even unrelieving amps make it audible.