But N.I.P. is a moving target.
The Lavender is supplied with the CD5Si all the way to the NDS. Do they all have the same N.I.P.?
The DIN to XLR is supplied with the 300 and the 500 (and the same construction is used for the 250, just with 1 wire not connected), do these all have the same N.I.P.?
All systems are a balance of sound that's an engineering compromise with component altering the sound in a different way, and this applies to Naim as much as any other manufacturer. So, if N.I.P. covers a range of balances, and another cable shifts that balance a little, but still stays within the bounding limits of one Naim system or another, is that not still N.I.P.?
No, it is not. Please read the comments I posted above about loss of tension and leading edge, and a certain softness to the sound. It is why I understand that Naim never made a Hi-line DIN/XLR.
What about changing speakers? They have such a dramatic effect on the balance of the sound; surely to remain with the limits of N.I.P. we must use Naim speakers, otherwise we'll be completely outside of the limits of N.I.P.. If we can change speakers to those of another manufacturer and remain within N.I.P. than surely we can change to a different manufacturer's CD player (or amp... or cables!).
that's debatable, some speakers do in fact cloak and choke the Naim intended performance.
P.S. I understand the principle, I just think your expression of your approach is far too dogmatic.
Maybe, some things like speakers are debatable, some issues like PSU are not.
There's a very good reason for that, and as I said, what I want is to hear what Salisbury designed so carefully. Others may like another sound.
to be clear I am talking about a Naim amplifier as a component. Not a source or a speaker.
In case it is pointed out I use Chord DAC and Dynaudio speakers, I would say agree, it is a dilution of the Naim intended performance. But that's ok with me, as I like the performance of Chord DACs and Dynaudio speakers.