NBS 3S power cable

After reading your original post I would use it with the ARC ref 6. It will add weight and body to the 6

NBS can be a very heavy sounding cable. If you system is on the thin side then it will work fine, but if not it might not work well. Their power cables are some of the best, but very pricey 

If your system already sounds thick and a bit heavy I don’t believe the NBS cable is going to be a good match. It has been about ten years since I was really into NBS cables owning a lot of them. I can say this, the sound is thick and heavy, but also extremely quite. You hit it right on the money when you said you don’t need more power. They will give you that.

zipost...Much of the NBS line of cables hasn’t changed since I had them. I’m not familiar with their recent offerings, but I see on their website most of their cables up to  Black label are the same from ten years ago. My last cables were Statement Extreme mk4. All cables from there down haven’t changed in the last 10-15 years.