Plinius SB 300 v Plinius SA 250 MK IV

Here’s the follow-up to my posts:
I received my Plinius SB-300 today. After setting it up and cleaning all contact areas with “Kontak” and then spraying with “ProGold G5”, I powered up the amp.
I was cautioned to give the BS-300 a good 30 days to reach it’s full potential (as was already my rule of thumb) I’ll leave the SB-300 on 24/7.
I think the Plinius SA-100 is a damn good amp whether running it in AB or A mode however for this comparison the SA-100 was warmed up and operating in A mode. The SB-300 was set up out of the box and I heard the following from the SB-300 as it’s been playing now for 2.5 hours and sounding improved the longer it plays.
The following are the immediate improvements:
1) More bass slam with a greater bass range.
2) More resolution overall.
3) Greater attack and improved details and imaging.
Associated equipment:
McIntosh MR 80 digital FM Tuner, Dodson DA-217 MK II D Dac, Sonic Euphoria passive preamp,
Wadia 20 Transport, Legacy Signature III speakers, Harmonix HS-101 GP interconnects, Harmonix HS-101 SLC speaker cables, Ridge Street Audio MSE Gen. II Digital Link Interconnect, Porter Port cryo’d Hubbell 8300 AC outlets, Electraglide Ultra Khan and Mini Kahn Plus power cords. My own power filtration system with two dedicated lines (pictures of power filtration system available on my system on Audiogon).
Best regards…

Out of curiosity,which Plinius SA 100 do you have? I currently have an SA 100 MKIII and couldn't be happier.Definitely in the top three of all amps I've heard overall in 30 + years of this hobby.

I had the SA 100 MK III, I liked it very much.
The SB 300 does everything better in a more extended way.
I recently upgraded to the Plinius SA Reference which is less than a week old and still breaking in. It’s amazing how much more detail there is in various passages now that were not auditable before.

Ive owned the Sa250IV nice. Is the 300 run in class A still??

The SB 300 is A/B.