I wouldn’t say I am a power cable skeptic, but my experience were that the gains were very marginal …until I tried a Powerline with my 300DR, not a revelation but a VFM upgrade; as I assume you have found.
There is a lot of truth in that. With just a XPS and 250 it’s perfectly possible to wire both into a standard 13 amp plug. Before any (more) Powerlines, dedicated mains will do a lot more for a lot less.
I have tried quite a few tweaks; many recommended on this forum. The only one that made a significant difference (and much to my surprise) was a Powerline. Buy one on the auction site as I did and if you think it is a waste of time you can move it on at probably no cost (prices have gone up noticeably recently).
I’ve bought both mine via naim dealers but at significant discount. One brand new (athough it was advertised as ex demo so that was worth the phone call), one lightly used but as new.
Certainly wouldn’t be paying full price for them when you can get used ones for under 2/3 new price.
In my limited experience, I suspect the Wireworld Matrix strip may be the bottleneck to the mediocre performance of any system, especially with amps plugged into it. The full potential of the system may be unleashed if you can do dedicated mains as suggested by HH. If that’s not practical, there are alternative power conditioning products but they are usual quite costly in comparison to the WW Matrix.
FWIW I have WW Matrix 2 too but have made some adjustments. My critical components now go direct to the wall outlet.
Are your sockets for the hifi wired directly to the dis board (with no tap offs)
To me to plug a powerline into a socket that’s daisychained around the house makes no sense…
spend the money on a dedicated electrical feed.
When I bought my ND5XS2, I had traded in my Turntable on it, so I had a credit with the dealer. He said I can have a Powerline for the ND5 with the credit, I passed and grabbed a pair of Kef LS 50 Meta’s with the money. I can actually hear the Kef’s, unlike adding Powerlines in my experience…so I agree with David.
Maybe it is a Canada versus UK power grid difference, but I always had to convince myself I heard an improvement when adding them.
For the money they charge, it should be obvious right away, not the case.