I have made quite a few changes to my system over the past 12 to 18 months. Going from a two box (+ Apple AirPort Express) 2 shelf system to a 5 big and 3 little box, 6 shelf set up. I love the sound and don’t really have any humming, noise floor is low and I can only hear a slight hiss with my ear very close to a speaker.
BUT, my cable count has gone through the roof and as I added boxes I’ve kind of weaved cables in and out and around so it is a bit of a mess.
Looks fine, I suspect most of us have worse. Personally I wouldn’t worry too much. Try to avoid power and signal interactions as stated. As for aftermarket shielding; if it was so important maybe the cables would incorporate it?
Avoid looking at the rear of your system. Worry less. Listen more.
Naim make cable dressing reasonably easy, power in one end of the box, signal in & out the other end.
Away from the boxes, try to keep them well separated. But a short close parallel run is not the end of the world
If you have to cross them, try to make the cross as close to 90 degrees as you can.
Keep power and signal cables apart as much as possible. Avoid any cables touching anything as much as possible. Certainly don’t add any kind of shielding - it’s likely to sound worse. The cables have been designed to sound correct as they are.
If you want to reduce HF noise then you could look into getting Chord Power Arays and Ground Arays. We use these and they have resulted in big sonic and musical improvements. But they are serious money.
You say you love the sound and you don’t seem to have any particular concerns so either leave it alone or just have a bit of a tidy up and see that your cables are all routed optimally. I wouldn’t worry too much but it’s always nice to think that you’ve got everything sounding as good as it can.
I confess that these days I really can’t be bothered to go to any great lengths with cables. I just do the best reasonably possible and then leave it. Maybe I could do better but frankly crawling around on the floor on all fours messing with bits of wire is just not the way I want to spend my time any more. When I have to do it I feel faintly ridiculous and I rapidly lose the will to live. Patience was never one of my virtues and now retired and hurtling towards old age it is even less so!
As members said look mostly fine. As long as you keep the signal cables away from other cables it’s all good. I personally don’t mind the lavender touching wooden rack as it will carry a little warmer sound.
