So I had the 350’s with the 332 to demo, my NDX2 with a 555ps into the fact 12 signatures (brand new from PMC the week before)
Now this is just my personal preference (and my Wife who is very supportive with this Naim upgrading thing).
I left the 332 & 350’s on for several hours and they definitely were warm, for me I didn’t like the sound, they were brighter and I felt not as pleasing to listen to, whereas on my full system with the 300dr into the 552dr it was much more controlled and for me (& wife) so much more pleasing.
There were some things that make it a bit of an unfair test as all interconnections on my system are using Chord Signature XL cables, I didn’t have a power supply on the 332 which I am sure would make a difference.
So, I have decided I am keeping the 552dr. I honestly can not believe how much of a difference it makes, the sound stage, separation, and just overall control is so nice, the 12’s sound fantastic.
I am hoping to try the 350’s again sometime in the future with the legacy cable, I haven’t given up on them, I know they can sound really good.
I also want to hear the 500dr, I think with the prices as they are, and as the 500dr is a perfect match for the 552dr it’s probably the best way forward., but I am keeping an open mind on it for now.
Regarding the 300dr driving the Fact 12’s, I don’t see any issues with it, it’s a very capable amp and at the moment my setup is sounding great, positioning of the speakers does make quite a difference which is a bit tricky for me how it’s set up but when I want a serious listening session I can move them into a better position. Forgot to add, I now also have the speakers on IsoAcoustic Gaia lll.
Just gonna add I am very lucky to have some very good dealers who have allowed me to demo this stuff at home, it really is the only way to truly know if it works in your own home.