Here is post from a gent from the What’s Best forum on the subject.
"If I were to rank the umbilical cords on a scale of 0 to 10 with 0 being awful and 10 being perfect (and by definition, unattainable), I would put the stock umbilical cord at a 2 or 3, the Audio Sensibility umbilical at an 8 and the Westminster Lab umbilical at a 9 or 9.5.
The AS umbilical is a HUGE upgrade over the stock umbilical, and as a value proposition, it gives you the best bang for the buck. The WL umbilical is a smaller upgrade over the AS, but it provides, at least in a high-resolution system, noticeably more resolution, deeper bass, more extended highs as well as a greater control over attacks and decays.
It’s the law of diminishing returns -- you get more versus the AS umbilical, but the incremental cost per unit of improvement is much higher than the incremental cost per unit of improvement afforded by the AS umbilical over the stock umbilical."
I just received the cable today. Boy, what a PITA it is to connect the cable to the Lumin proper! What a design! Took a little swearing...
ozzy