Do long interconnects degrade sound?

I agree with Cwlondon, your Krell should drive 50 feet of low capacitance interconnect with no problem. If you want to be sure, check the specification of the chosen interconnect (at final length) and call Krell with the data.

Most high end cables are so low capacitance that even 50 feet would effect highs (roll off) only above approximately 100 Kh. It's even less of an issue with balanced because the output impedance is generally very low (600 Ohm), making the load even easier.

Thanks guy's for the great advice! My wife wants all the electronics in our den, but I don't want to run 50+ feet of speaker cable to my OB-1's in our living room since I am sure this would degrade the signal. I am looking to purchase some small mono's and I will run long interconnects back to the Krell. Thanks again for your help.

As long as you don't compare the sound you get from using your 50+foot run to the sound you get from using 3ft runs then you should be fine. Either way you can definitely still enjoy your music. Sound, convenience, and looks are all factors to consider. Some of us sacrifice looks and convenience completely for that extra bit of sonic improvement. While others sacrifice a bit of sonic potential for better convenience and or looks.

Depending on the quality of cables you get, 50ft runs can be expensive and could be somewhat of a visual disaster if you're running the cables along the ground. It might be worth getting another preamp. Something to consider though.

Albertporter...Do you really think 600 ohms is a low output impedance? 600 was typical of tube preamps (12AU7 cathode follower) but I have heard that some modern tube units are down to 200 ohms or less. Solid state typically runs 50 ohms or less.

I belong to the "long interconnect, short speaker cable" school of thought.

I have experience with long interconnects 75+ feet.

RCA type have a tendency to pick up more hum or ambient electrical noise which is apparent when you have the volume turned up and no music playing....hiss or hum.

XLR driven by balanced amplifier cables are far superior for this problem of ambient noise because of the shielding and less grounding issues ( which can set up small current loops).

In either case it is just the hiss that will be a problem and the sound is not degraded,