Which cable will reduce harshness of CD player?

Buckingham, Believe it or not a power cord can shift the sound more than a PS Audio. I know it sounds crazy - but it is true. In my house a PS Audio made NO difference whatsoever.

The Quadlink should be okay on your digital source. I have never listened to the Quadlink but suspect it will be okay. If you can get your hands on an Absolute PC, try it too. They cost 50 dollars and many audiophiles swear by them.

The only real way to know which cord is best for you and your system is to try as many as possible.

Greetings Eric et al...
Got your email; I'll jump in here with my commentary per your request.

The U2000 fantastic one box internal DAC player is one of the smooooothest machines out there as is. Yes get a good AC cord, a good AC line conditioner, good interconnects, & enjoy. No need to filter through a tube buffer or an outboard DAC.
Cords that I've found work well with the EAD: Synergistic Reference AC, Custom Power Top Gun, JPS Digital, Kimber PK6, no doubt there are others...
My interconnects are the very neutral Synergistic Resolution Reference MKII (with active shielding), and for source component line conditioning I have the Chang Lightspeed 3200 plugged into a dedicated line.
The player sets on Black Diamond #4 cones, cones on a Black Diamond shelf, shelf on Vibrapods.
Sound is rich smooth airy & detailed. The player is fantastic; Optimize your rig for what the EAD is capable of doing for you. This is one really sweet machine.

Esoteric Audio Research Digital Reference comes in a version with a special filter/resolution enhancer. It's a patent pending design and IMHO beats all those outboard jitter filters. I have done A/B testing and there is no comparison. Although some might find $799 a meter out of reach, I'm sold on this new technology. It was not developed for the masses, as it is meticulously handmade. Just my .02.

I'd agree... don't use a cable to solve this problem. Power filtering would be the first step I'd try.

i know there's a lot of "cable controversy". i agree that cabling can have a sonic impact on a system. however, i also agree w/those who say cabling should not be used to try & correct any perceived system deficiencies. get equipment that sounds good to your ears, on its own merits, regardles of cabling used. after you like the basic sound of the equipment, then, and *only* then, should you experiment w/different cabling, to fine-tune the sound. much more cost-effective, & much simpler to obtain best overall system results, imo...

ymmv, doug s.