Got my new cables from Quad today..
Instant difference to the sound using the 500mv output.
I can turn the volume to about 12 instead of 7 now so the preamp is doing more of the work before the power amps. Altered the sound drastically, in a good way!
Changed the cable from the CD player to preamp to a phono to 5-pin DIN.
I don't think that I need to change anything about my system now, sounding really good.
All I have left is to pass on my Cyrus preamp & various spare cables!
Thank you to everyone who has helped over the past few months including CnoEvil, David & Rick.
I will keep an eye on the forums to see if I can help anyone else with my experiences.