What sound diff. can I expect from PrimaLuna EVO 400 pre and power amps VS an EVO400 int.

Going separates will get the last bit of refinement the integrated can’t produce.

Integrated if you just want to enjoy good sound and not be neurotic about audio.

Speaker choice and placement will make or break your expectations.

The phonostage will handle a high output 2.5volt MC. Get a separate phonostage, if you’re serious about LP playback.

Longtime PL user.

IIRC when I asked Upscale this question in 2021 when I bought my 300 Evo Integrated the reply I got was that is was something like a 15-20% sound improvement for separates - for about double the price.

Agree with tablejockey about getting a separate phonostage.

The specific tubes being used can be a variable if they're not exactly the same.  I definitely prefer  to stay with all tube, but I suppose it depends somewhat on what speakers you're driving.  Switching to SS will sound different.

Thank you all for the responses.  I have the speakers nailed. In 1978 I upgraded to Klipsch Cornwall II speakers from Heresys. I paid a whopping $ 479 each, and have never looked back. They still sound great. Now that I have a few bucks, if I could find a pair of KHorns in good condition, and for a reasonable price, I would add them to my system.

I have a Clear Audio turntable with an upgraded Satisfy black tonearm and Concept Low output MC cartridge. That was my upgrade from a 40-year-old B&O turntable: a significant improvement there.

I am using a Willsenton R8 integrated Chinese-made tube amp with KT88 tubes and a Schiit Mani phono stage. The system sounds better than anything I have had before, but keep asking myself what I can do to make improvements in the sound produced.  The Mani produces a sound quality far above its price point.

I suspect that the PL EVO 400 integrated will be a marked improvement, but the phono stage is an open question. My MC cartridge is low output. 

Suggestions?

Thanks