Hello All.
I have matched NAC282 to my XS2 and surprisingly was impressed with the results.
The idea was to keep the sound characteristic of the XS2 that I like by adding NAC282 instead of switching to SN2.
Now I consider my new step forward thanks to ebay listings of second hands NAPs - NAP200, NAP250 and even NAP250DR.
Both my 282 and HC2 are DR.
Any significant difference between them?
My speakers are ProacD2R
Go 250DR: a natural and funky match 
and 20 years before it needs a service!
They are different, and ideally you need to hear them to determine what suits your tastes best.
With hindsight I enjoyed my 282/200 just as much as the 282/250DR. It did lack the low end grunt of the 250, but it had a delicate touch that the 250DR lacked.
Most will tell you that the 250DR is a significant improvement over the previous 250.2, but that is not a universally held opinion. Earlier versions are also different, and in some cases are less able to drive certain demanding speakers that the later versions.
The 250DR is the obvious choice but left field suggestion the NAP300 actually matches very well with the 282, several available in the flea pit.
I think you will find that the Nap 250 DR needs to be serviced when the sound starts to go off or every 10 years, whichever is sooner. I remember @Richard.Dane posting about this not long ago. Because the 250 DR is a fully regulated amp, it should be serviced sooner than the usual 10 to 15 years of the unregulated amps.
I would go with the NAP250DR with the NAC282. I did run a pair of ProAC D30RS with my system. My first system was a NAIT XS2 with ProAC D2D speakers.
Yes, the regulated amps, when they start to go off spec, the sound can deteriorate far more markedly than unregulated amps, hence why I reckon regular servicing with these is mandatory.
I could swear that I saw somewhere that Naim were now recommending 20 years for DR kit, but cannot verify the source of this rumour. Personally I blame Heimdall for not going for his millennial eye test!
Just turn it off at nights and when out, it will prolong the need of service, maybe five years ?
I don’t think i have ever read such a silly reason for trying to prolong a service interval.
I would want pre amp, power supplies and power amp nice and warm and fully “soaked” at whatever time i chose to listen to music. Leaving the power amp off overnight in my mind is a silly proposition. Just get stuff serviced when it is supposed to be serviced.
Keep it on, stop stressing the innards and enjoy a massive uplift in SQ. it’s just taken my 250DR five hours to recover fully from a 3 minute switch off!You wouldn’t stop using the indicators in your car in case it wore out the bulb/led? Mind you, on some of the roads round here, it’s as if they decided not to have the indicator option installed!
Just to be clear, is the service interval for a NAP 250DR 10yrs and NOT the 12-15yrs I understood it to be ? I was recently told by a dealer 10yrs was too soon for a NAP250DR… mine turned 10yrs old this month…. Also have an XPS/DR from October 2015… is this also due for servicing ?
Thanks… so it would seem 12-15yrs is right for both my 250DR and XPS/DR, though right now would be a great time to do it as the system is all boxed up whilst we decorate the living room.
May I ask if the recommendations are for age of equipment irrespective of usage pattern or they can be directly correlated to actual usage?
For example, an amp is 10 years old but actual usage is 3 years.
AFAIK it’s down to age. Capacitors will age just left in store on a shelf.
Get the best amp you can possibly afford. The 282 with HiCap DR and 300DR will sound epic! 250DR is a great amp also.
By the way your 282 is not DR. It is the HiCap DR that makes the preamp 282 DR.
300DR will give you greater detail, transparency, separation and bass performance.
250DR will give you a great power amp, capable of more than a 200DR.
The 200DR is still a very good power amp and many on here love it.
The higher you go in Naim’s Original Classic series, the better handling of power you get. More separation, more grip and control of power and bass.
The 250DR represents a very happy medium in the range.
I have had a Chrome Bumper 250, 2 x 135s which is sometimes seen as an older equivalent to the 300 and now the 500DR.
The 250 was not enough for me and my system really became great with 2 x 135s. The 500DR tops them all.
So if I was you, I would go for 250DR or 300DR if you can afford it.
In addition to @Dan_M’s excellent comment the 300DR is better at lower volumes.