Will upgrading Umbilical cord power supply to preamp improve sonics


H, Is there any advantage to an higher quality umbilical cord. Cables everywhere else make improvements for me through out my system. I've never put much thought into this and don't even know where to buy or if they are even available and if so where? If anyone has done this upgrade was it a large improvement and not just subtle and what was cost per cable? Thanks

paulcreed
What are the issues with Revelation? I’ve only purchased their products used and have been very pleased 
I did read before my second post when vendors names were given Revelation audio has had some issues with not shipping items after funds exchanged. I'm going to avoid them if this is the case, don't know if it is true but just what I read online. I guess each vendor is going to have a flavor of its own. Now I'll just weed through that now. Just want neutral if these umbilical produce a signature sound.
NO! The sound of any audio circuit starts with the power supply. NOT the wires going into and out of the supply. To believe otherwise is to fall for the entirely subjective opinions of the untutored! 
You could talk with Chris at VH Audio.  He will probably have some good suggestions and can probably build you a high quality cable for less than others charge.