So a little update, I've now settled on keeping the EWA loom... It's enhanced the system perfectly. Going to be keeping 1x MCS-5 mains cable, 1x EWA USB cable, and a 2.5m pair of LS-40's.
I can recommend trying an EWA loom to anyone who maybe interested; every cable has had a positive effect. Even the USB is noticeably better than a standard Lindy Cromo Class 2 cables.
Tried swapping the EWA MSC-5 power cable back to the Neotech yesterday, Its not a massive difference but still better, the MSC-5 had more solidity and definition to the bass and slightly wider soundstage... I have two here on (free) dem purely to complete the loom, 1, 1.5m MSC-5 to the U-300 and the other 1.5m MSC-5 to the HD-PLEX 300 PSU. I can't justify keeping both except on visual merit lol, it's a bit perverse to use a £530 mains cable on the £440 PSU feeding a computer
I was fairly sceptical of the mains cable and to some point the USB cable too. I don't understand how or why they should make a difference due to the obvious and had previously thought good shielding being of any real merit.
I've noticed they take a good week of solid use to fully reveal their true potential from new. The LS-40s were brand new when I got them first time around. This new loom was all newly built again. Either my perception of them has climatized or they do really need a good running-in.
So once again, thanks to
@ABCaudio &
@CJ14 for the demo/loan. Alan/Colin, do you want to start a tour with the additional 1.5m MCS-5 mains cable i have here?