Upgrade power cable for Quads???


Hello,
I enjoy a pair of Quad 988 esl's and I was wondering if anyone who owns (or have owned) Quad esl loudspeakers have tried replacing the factory power cable with an after market 'high end' power cable. And if so, did you notice any sonic improvements?
Thanks
128x128grateful
I am trying out Soundstring Power Cables on my Quad 988, and it makes a huge difference. There is so much more bass, I may need bass traps.

I am also interested in hearing others experience.
Have been using Transparent pcs (entry level) with my 3 year old ESL 2905s. It does make a difference but have not tried experimenting with more expensive pcs. The system sounds really good as it is.
Best of luck.
Interesting to note that the speakers are fully charged (at least the 63's are and I assume the newer models as well) only a few moments after they are turned on so why would the PC make a difference in the tonal extremes? Seem to be different schools of thought on this. I find that a better PC does eliminate some noise in my 63's, but I can't say I hear a difference in the bass.