Ordered today a brand new NC 250, with 20% discount ( Naim week days at my dealer place). Great smile on my face that will counter balance the weather morosity 
As I have a 250 dr, will report how it compares. Bought it blind, but half blind, if I take into account all the praise in the forum and reviews.
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Looking forward to read about your findings in due course.
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Good luck. Itâll be interesting to hear your impressions with the NDS.
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Looking forward to your feedback and comparison.
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Enjoy FRâŚâŚyou deserve a treatđ
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Hope it works out well. My impressions of NC kit are very very good.
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Thanks, letâs believe in that 
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Today I wanted to listen to the 300 series. But the dealer couldnât make the system work. Bad luck. It was a full 300 series, with the 2 300 ps.
For some unknown reasons the 332 preamp was switching itself from pre 1 to pre 4 or 6. Curious.
I will return tomorrow and relate, if it works.
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The left and right speaker outputs are the opposite of the 250DR so double check when you hook it up. Its easy to get them backwards after years of being the opposite.
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I had this problem at first and it turned out to be the set up in the app. The system automation setting shows the preamp associated with the nss333. I have the nss333 connected via din to din input 7 (the middle of the three din inputs) and selected preamp 1 as the associated input. This equates to the âStreamâ button on the front of the NAC332.
At first I guessed the âStreamâ to be preamp 4 and set the association accordingly - the Nac kept switching to phono.
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Thanks. I will check with some tracks I know well, knowing on which side some instruments have to sound.
Sorry, but donât understand how you finally resolved the problem.
In the Naim app, go to the âStreamer Automationâ screen where you can select the Preamp Streamer Input. You would think the number corresponds to the socket number into which you plug in the streamer. It doesnât! It corresponds to a virtual number assigned to the button on the front of the box.
In my case the Streamer button is number 1, the same as @Bjm so it must be standard, so I have had to select 1 as Preamp Streamer Input.
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Hi @frenchrooster , sorry it was not clear - please read below and also see the response from @clog .
Connect 333 and 332 exactly as below using din cable.
On the Naim app go to settings, then system automationâŚ.
Adjust the settings exactly as below.
From the 332 manual, this is how the inputs are set upâŚ
This bit may also helpâŚ
I hope this works.
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Snow Dog and I had the pleasure of visiting PJ HiFi for the 300 Series demo run by Jason. Thanks to all invoved for setting this up and it was most enjoyable. Speakers were Audiovector R6 Arretes with NAC speaker cable. All interconnects were standard as supplied. I have floorstanders from the range below the R6 but have heard the speakers several times so they were familiar.
Jason ran the demo from the starting point of the 200 series and then introduced elements of the 300 series. First the 333, then the 332, then the power supply on the 333 and finally a second supply on the 332. All with the NC 250 driving the Audiovectors which while great, were probably a bit much for the room and our seating position.
The demo was, as usual, great and improvements were clear at each stage. Separating out the streamer and pre-amp was a big step and the power supply on the streamer was also significant. Jasonâs view was that unless you have two great sources, the greatest benefit of a single power supply was on the streamer.
I thought the defining features of the series were the level of detail that was present and the near-elimination of the noise floor was probably a big factor in this - the âelectronicsâ werenât in the way at all! I was also impressed by the tunefulness of the bass - a real sense of melody and drive. If this is what others describe as PRAT, then it was there in spades. We didnât listen to âmessy rock and rollâ so that will wait for an individual demo but vocal, classical and percussion tracks were all strong. I was staggered how well the NC 250 coped with all the changes, and the speakers. This is clearly a very special power amp.
We then had the 350s added. My word - I would have to be very careful with that volume control! This was a big step up from an already great power amp. If I were in the market for these (which I am not at present) I would want to explore thoroughly that my speakers / room could cope. Iâd love to hear what they could do fed with some Rush!!!
In my view, the 200 series is excellent and if I didnât already own my 282 / 250 system, I would be really happy to start there. I am going to explore streaming improvements and after this demo, the 333 is going to take some beating, particularly with the power supply.
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Thanks guys, I will tell you if my dealer finds . I return at his place this afternoon. If not I will show your responses. 
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Enjoy your listening this afternoon and we look forward to reading about your impressions.
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Thank you for a thoughtful review/summary of this event.
Jasonâs view is in line with Naimâs traditional âupgrade the source before the preampâ approach.
This recommendation of Jasonâs will obviously be of special interest to people who are focussed on a streaming only front end.
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And TT/Vinyl approach of course !!
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