I home-demoed an NDS previously with the same Burndies by removing the CD555 I had then and plugging same Burndies into NDS - all worked.
I then did the same for my ND555 - I have not changes the Burndies the entire time - same ones I got with the CD555 and that worked with the NDS and ND555.
I can also confirm that I borrowed a second hand NDS from my dealer last weekend to try in place of my CDP555 and used my burndy’s from the 555PS and all worked perfectly.
I’m using a CD555 with just the one power supply that has recently been DR’d. The NDS was/is very good but it did not engage with me in quite the same way the CD555 does. It definitely sounds different. A bit more two dimensional if I’m honest. Not quite the immersive and involving sound the CD555 is capable of giving you. I will caveat that I only had the NDS for a few days and warm-up can be critical in these situations. This would seem to fit with why Naim felt the need to introduce the ND555?
Thanks @Geko. I am running mine with 2 555DR’s and before getting the CD555 I thought about an NDS. The CD555 is a great player and makes it VERY hard to stop listening to music. Thats the real test!!