Krell Evo vs Evo-enhance

@Mert,

We would sligthly turn to off-topic if discuss now all possible "in-wall" variables that affect sound... They exist, as well as the speaker-itself issues. Of course, I agree that on some 92-93db speaker sensitivity (say, Focal) a good deal of inherent advantages better power supply brings will be less audible.

I said, and I still maintain that a pair of 400W monoblocks should be way better than 400Wpc stereo amp from the same manufacturer. A few spec details I quoted just support that statement. Nothing else.

@Mert said:
"402e is exactly two 400e together put in one chasis"

This is, put simply, miles away from correct. Design-topology differences itself aside, let's compare power supplies only:

Evo-402e: two 2200 VA transformers and 188000 µF overall
Evo-400e: one 3000 VA and 110000 µF per piece - that means
two 3000 VA transformers and 220000 µF overal

(disclaimer: Krell's website claims even 4000VA per piece for Evo-400e - by my opinion lingering typo from the original Evo-400 white paper which had declared 4000VA as well. I am owner of a pair of Evo-400 - they have 3000VA each)

A pair of monoblocs, even the "smallest" Evo-400e, should be significantly more competent end-power potential than stereo amp with the same 400W nominal power, as the Evo-402e is.

Unfortunately, it costs...

I must say I am pretty sceptical about the green stand-by, which reportedly "consumes only 2W".

2W per hour is that minor, so only reasonable explanation might be that the green diode itself consumes the whole 2W. That means that during "green stand-by" all major power supply circuits are essentialy fully disconnected yet, out of current, so that a real warming-up of amp actually does not occur. Real warming-up, of course, occurs during so-called "high current stand by" (red diode), which consumes some normal 150-450W per hour, depending on Evo-e model. However, this normal red-diode-indicated stand-by is being already known from the original Evo (not "e") series.

What does it means? Well... Ask Krell's marketing department...

BTW, I am happy Evo-400 (not "e") owner. Would be perhaps a bit more happy if own a pair of new Evo-400e, not because of the green stand-by but because of other improvements (reportedly slightly upgraded power supply, increased filter capacity etc).