Wonder if the output transformer has better stability in this new one.
As the old one didn't, looking at the peaking FR and overshoot on the SW.
Can't tell till a bench test is done, or some start saying it's a touch sibilant on extended tweeters. 

https://www.stereophile.com/images/1214PLDPIfig01.jpg

https://www.stereophile.com/images/1214PLDPIfig03.jpg

Cheers George
"Congrats on the Evos. I just ordered a Pl Dialogue Premium Pre and a Evo 400 amp."   

I am eyeing a dialogue premium preamp too. I do not see anything in there justifying a  50% jump in price between the dialogue premium preamp to the 400 EVO. I have a dialogue premium HP amp at the moment and it cannot use balanced input. I guess I will take a page from Kevin Deal's book and look what is inside..... and, for what I know now go for the dialogue.
I was hoping by now Kevin Deal would have jumped in here to elaborate on the EVO’s upgraded parts details...Seems odd that he hasn’t...seeing he is the US distributor. Nothing really on his site either. 8(
I am really enjoying the combo so far.  I already started rolling the tubes with what I had from my HP.  KT150 and  Brimars Cv4003 on the Evo 400 Amp and mullard CV4003 Brimar CV4003 combo on the Pre. Considering the Phillips rectifiers as my next step...

Great combo thus far. 



Huge Thumbs up to the PrimaLuna Evo 400 amps and Evo 400 preamp. I wish I could give a comparison review with the earlier models, but I never owned or heard PL gear until now. The PL amps seemingly have nothing lacking even with only 100 hours burn-in. I tested the Hana ML cartridge against the Lyra Etna SL, and the PrimaLunas let me hear instantly the differences between those cartridges. The Hana ML sounds spremely balanced at all frequencies and has amazing dynamic slam. But the Etna matches those qualities and adds unbelievable low level detail retrieval. I truly believe lesser amps woud not have allowed me to hear that additional low level detail. They are stunning amps, and for the price I'm more than satisfied. Instead of rambling on, I'll offer to try to answer any questions if anyone has any.

Equipment used - Kuzma Stabi M tt, Kuzma 4-point 9 tonearm, Lyra Etna mono and stereo cartridges, Hana ML cartridge, Moon 810LP phono stage, 2 x PL Evo 400 used as monoblocks, PL Evo 400 preamp, 9 x Synergistic Research Galileo SX power cables, SR PowerCell 12 UEF SE, SR Active Ground Block, SR Gallileo SX interconnects and speaker cable, Martin Logan CLX speakers, JL Audio Gotham sub, Furutech SK-Filter.