Just before Naim stopped doing DR upgrades to existing products, I ordered a DR update for our 552. Unfortunately my travel plans and other things got in the way so the 552 got sent back to Salisbury recently for the long overdue update.
You can see my system in the profile and it is very carefully installed (no wires touch and everything optimised set up wise. It also lives in a walk in cupboard so acoustically isolated when in operation.
I also thought the 552 without the DR was very good, much clearer and open than the 52 which is still in the reference league, the 552 is open, faster, but with a hint of richness that the post olive series grey boxes all have. The 552DR has been in the system 48 hours, and from the first few notes I could tell that this pre-amp did the business, I listened to the NAT01, Petroc Trelawny voice was so so clear, spooky realism. Then flipped over to the Klimax DS/1 and listen to our HDX ripped library, some CD’s again presented with more openness, more detail, more speed, just so fast and open and natural. Also the bass region, so open and clear, more open and natural. On the regular 552 and active set up, sometimes I thought the bass region was a bit too rich (this is all very subjective of course!)
A significant step up from the 552 as was - hard to put numbers but 30% better subjectively, and this is only after 48 hours (also note my pre-DR 552 was recently serviced so was not a tired example). I Tonight, I am going to play the ultimate weapon - the Naimed Phonosophie P3, Aro with Supercapped Prefix on a Mana shelf!
552DR is ace! Well done to team Naim! I don’t know who designed it but big thanks - I did meet Roy George a few times and he’s a genius, as well as Paul S and @110dB who are all Naim gods (alongside Jason Gould and Mark Raggett and so many other great people at Naim - too many to mention!)
Also Nait50 waiting to be installed in second system with HDX, N-DAC, NAT 02 tuner, Nait 2 and SBL
My worry is now what next: is it NC250 active to replace my active 250 or used 250DR active!