New 252, maybe the firmware


that makes sense, it’s very tight, just a bit overpowering in the current set up.

Hi Danie,

Sometimes when you make a significant upgrade in the Naim electronics, you will find that the previous locations for your speakers are no longer the optimal ones. I would urge you to experiment a bit with speaker placement before you come to any conclusions about your electronics. Moving speakers a bit closer to the wall behind them often increases the apparent bass performance, by setting up more of a sympathetic room response. This might help better integrate the higher frequencies in your system. Or you may find that the speakers sound better when moved further away from the rear wall. You really have to experiment to find the best balances; for your tastes and for your system.

Good luck,



moved them much closer to the rear wall this morning and this has worked very well, thanks a lot.

The 252 is very high gain because it was designed in an era where line level was ~1V not the 2+ that modern equipment puts out.
I very rarely have the volume control above 8-9 o’ clock.

Do you know if that is also the case with the 552 preamp?

V interesting, 8 blows me away. Is there any variation between source selection? On CD at the moment.

Not by input, no - other than AV set to unity gain.

Thanks, where are you from for a late UK answer?

Qobuz land - time seems to disappear here!
UK, in my comfy chair, with headphones so I can listen late. (And now early)

Well not really… going back before the digital era line levels were often higher than we have today. The 252 and 552 from memory are fine upto 5 volts input if they need too… they are designed to be wide range and generic with sensitivity starting at 75mV for flexibility … part of the quality you pay for a Naim NAC. However Naim NACs are clearly optimum with Naim source output levels and impedance responses whether it be a ND555 or NAT01. I believe many Naim sources are at 2.1V RMS, which is approx 3 volts pk to pk… do not connect a Naim source to high gain input if used by a different manufacturer as damage might occur.

The 252 and 552 were designed when CD players were almost universal, so yes does assume you have a Naim CDP connected for ground earthing… otherwise you need to elect another device to be ground earthed instead for optimum performance.

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There is no real difference… although you might find an ever so slight sonic presentation between source inputs.
I usually ensure the secondary NAC selection is another input to the one I am listening to unless I need them to be the same.

so the 252 is super clean. maybe a bit too much. I feel like I’m in a studio. absolutely nailed on crisp. but I’ve lost some magic that I had with 272/250.

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Stay with it. You will get used to hearing what you haven’t been able to hear.


thanks, the 252 was too close to the supercap. I didn’t realise it was that sensitive. cooking on gas now!


also, my system is open plan with the kitchen. big fridge buzz.
any improvement available apart from turning the fridge off or moving it?

If it’s the fridge itself that is buzzing then first check that it’s all square on its feet and that any drip tray or pan is not the cause. Then try turning it off and leaving it switched off for a few minutes. Then turn it back on again. Sometimes this does the trick (Just, whatever you do, remember to turn it back on). If buzzing persists it could be down to the fan or the compressor - the fan may be a straightforward fix to replace, but the compressor is a job for the pros.

I was in exactly the same situation …
Went from 272/XPSdr/250dr to NDS/252/SCdr/250

The magic just vanished…so eventually the 252 had to vanish to …to restore order

Good luck with your journey…took me over a year to get to a situation where I was happy I had an improvement

pulled the 272 out to compare. naked it’s not that far away from the 252. seems to have a bit more oomph and knee tapping. thinner in general but not always.
will be experimenting this weekend.
can you hook the supercap up to the 272?

the main “downgrade” is the dreamy 272 volume control. missed that.

The Supercap cannot work with a 272.