I agree.
IMO, what Naim should say is that they recommend using their own cables, with a minimum length of 3,5 metres - or cables which provide at least X pF and Y μH.
Based on the spec for A5, from @GadgetMan above, then using 3,5 metres of A5 these figures are:
Capacitance - 56 pF minimum
Inductance - 3.5 μH minimum
It isn’t really in Naim’s interests to say who’s cables are compatible and I’m not aware of any other manufacturer who does this either, although most do tend to incorporate the inductor in the output stage minimising the risk of the average loudspeaker plus cable causing the amplifier to oscillate.
I remember one lecture where they said, (partly in jest), “set out to design an amplifier and you’ll probably end up with an oscillator, design an oscillator and it probably won’t!” That has stuck with me after all these years :0)
When I purchased my Supernait 3 I was in doubt of using my existent Audioquest Robin Hood speaker cables with the Supernait, as no one had a clear reply contacted audioquest in the US to know if it would impact or damage in any way the Supernait 3.
Their reply was that the Audioquest Robin Hood are safe and compatible with the Supernait 3 and that I can use them without worrying and that they will sound great.
And yes, they sound great and the amp runs cool. Compared to the NacA5 that I find it to be great for the price, but still preferred the Audioquest presentation and refinement.
Naim have no duty of care, as a matter of law, to an end user who uses non-Naim cables with Naim amps.
One step further in evaluating naca5. Clean cut on 6.8m wires and fresh solder on never used naim plugs. Drilled 4mm holes into a pcs of wood (the plastic cap was not on during soldering). Flux made it super easy for the solder to flush out. Took few seconds with a 100W solder iron. Most of the struggle went into getting the black back caps on again… I guess what one should do is to come in at an angle bending the copper wires to say 10 and 2 a clock.
Yep. As you say it makes it easier to get the cap back on.
Nice work though on the soldering 
Cable manufacturers should be accountable for their own cables. They should be stating whether they are compatible with Naim amps and offer a guarantee. It’s the cable manufacturers that are taking your money not Naim so why should Naim help them out?
Peel them off some more .
It’s important that the soldering isn’t to high,if so it will touch the contact housing.
Your soldering looks pretty good, but there is very little room onside that black plactic box. I find it best to strip only about 10mm of the wire, and to not cut the web between them, so that after soldering you can bend the exposed copper out to fit in the holes. Then the remaining insulated cable still fits through the entry hole.
Also, you should ideally have the wires right down inside the slot. If they protrude above it, or if there’s a blob of solder on top, this can make it impossible to screw the box together.
This may all seem a bit OTT, but the black box should really be free of the cable, not clamping it at all.
Ah so when they twist to fit inside the back cap they turn and get closer to the sides yes. But I managed to close them and look correct so I guess this work is done anyway but thanks for the tip
As Chris SU described much better,the cable should not be clamped or touch…
Fat chance of that, what would be easier and more practical is for all the cable vendors to publish the cable specs… The all important inductance, (important for Naim that is) capacitance, resistance, size (mm/2 and AWG) dielectric & copper with any plating spec
Fat chance of that 
Ok naca5 lovers out there 
They are in. Let’s see how it goes. Will give em a week or two then comparing with my Oephi Ascendance. Different price range of course but let’s see what synergy adds not thinking about cost.
First thing that comes to mind with naca5 in my 552, NDX2, 300DR system is - Flow
I would wonder why a cable vendor would not publish information, which they clearly would know… Or should know… 
[ from @GadgetMan above -
NACA5 specifications are as follows:
Capacitance: 16pF per metre
Resistance: 9 milliohms per metre
Inductance: 1uH per metre ]
The NAC A5 specs don’t fully help though. What you need is the amp’s ideal comfort zone range. A5 is totally different from SL for example. And being careful of “high” capacitance is a nonsense statement. “High” is not a number. It has no real meaning. As it turns out 100pF/metre is many times higher than A5 but still a comparatively low capacitance. Naim are really worried about some of those 600pF cables out there IIRC, but don’t say.
Still, if a dealer tells you they often use cable X with Naim, and they have decades of Naim experience, I’d trust that.
Finally, we are ‘cooking with gas’!
Clearly there is a conspiracy against Naim users. 
What speakers do you have ?
