What kind of step up are you experiencing here. Considering you could buy 4 HE’s for the same price.
And on headphones?
Clear that it will be an upgrade but as specific replacement for the HE how are you rating it.
So you are running 300s active into the ATCs?
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And if you could share some thought on the bare 222 vs the Atom HE that would be great?
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Indeed so, and for many it is, and more!
I can commwent on this one. I have run both into my active SCM40A. The 222 is significantly better, more transparent, more detail etc. Not tried through headphones though
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No - 250NC XLR inputs are a standard config whereas 300DR are Naim specific…
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Good to know, I am planning to do this comparison soon myself and see what the difference is before the 300 PSU is added.
Could not agree more. Unfortunately it is not an easy thing do but ultimately is the only way to make a reasonable decision.
Maybe it works in the reverse and the 222 is 30 above the 252 
Who knows what these numbers mean?
Does anybody know if these new amps still use the Zobel Network and therefore still need a minimum of 3.5 meters of speaker cable or have they been designed so they can take advantage of new wireless technology/speakers?
Cool - thanks.
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Steve mentions earlier in the thread that the new amps are technically much more tolerant of different cabling. Of course, how that will work out sound-wise, nobody has yet ascertained. I note that Steve still recommends NACA5…
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Does he means the 222 with the 300 power supply?
I’m specifically interested in this. From Steve’s comments there is no doubt it will be better but curious about what people are experiencing in the wild.
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The following is also in the manual, which are all now on the Naim website for the new boxes:
4.3 Loudspeaker Cable and Connectors
For optimum performance, use Naim NAC A5 or Super Lumina speaker cable,
connected in the correct direction (for example, NAC A5 printed arrows
pointing toward the loudspeaker).
It is important your pair of speaker cables are both the same length, up to a
recommended maximum of 20m. Unlike some earlier Naim designs, we do not
mandate a minimum speaker cable length, but would still suggest you avoid
sub-2m lengths
Link: https://www.naimaudio.com/sites/default/files/products/downloads/files/User_Guide_NAP_250_web_0.pdf
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Probably. Numbers are so confusing🤔
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I’ll have a listen tonight (through Focal Stellea)
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Hi @Marq,
Unfortunately the NAP300/500 RCA to XLR leads are wired slightly differently and will not work.
A good dealer would be able to re-wire them if you’re so inclined.
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Hi @Yorkshireman,
The new NAP250 does have Zobel networks (makes speaker impedances look more resistive and less inductive) and output resistors. This greatly increases stability with a wide variety of cables. We do many tests during dev. FYI there’s also other compensation networks within the amp (1x lag compensation, 2x lead compensation)
This is the same as NAP250DR and the previous gen 250.
We do still find they sound better with a few meters of cable but no technical reason to not use short cables if it suits your setup.
Very early Naim could go unstable with some speaker leads e.g. Nait 1 didn’t have an output resistor.
Best
Steve
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Appreciate that and thanks for your support on this thread.