Synergistic Research EXCITE Phono Cable

the manufacturer should be able to tell you, no?  pretty basic info for a phono cable...

Actually, no, you don't need this. Not at all. If it sounds great you are done. Unless you really to want to experiment with loading. But in that case you go by your ears, regardless of whatever number they give you. Since the final arbiter either way is how it sounds, why do you need it? A: You don't.