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