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

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      

Thanks again.

Years ago, when I was younger, and a little dumber, I got my pilot's license. Flying small, single-engine aircraft was not really exciting, so I started jumping out of them. That was one hell of a lot more exciting.  I logged over 32 minutes of freefall time before my then-fiance made me stop.

I equate the effect of this OCD quest for better sound on my bank account to a jump from 9800 feet with the resulting 45-second freefall. In both instances, there is a very rapid drop.

I think the prudent move is to acquire a good tube phono stage first and evaluate its impact on my system. The preamp or amps can wait until I can evaluate the effect of that component. 

Time will tell.  

Ausioman58: Thank you for your comments. That goes into a level of detail far beyond where I usually delve. Is it only the EOV 400 with that issue, or do other PrimaLuna amps have the same problem? 

Are there other tube amps and preamps in that general price range that you recommend? 

Of course, I am interested in the sound quality above all else, but when I spend a wad of cash, I expect longevity as well as performance. In an age where competence is a vanishing commodity, perhaps I am asking too much.