Uncommonly long RCA IC cables?

While I am not recommending any one over another, this is really what the networked (those little boxes) on the cables are supposed to help with. Transparent for example, where the networks (from what I understand) address this as though your 25-30 foot run is no different than a 1 meter run. Also, I would think you would consider a shielded cable for the protection against RF, etc. . .

It really depends on the output capabilities of your preamp and the ambient EMI noise in your environment. I run 10meter interconnects without any problems.

Kal

It depends on the output impedance of your preamp and the combined impedance of the cable and the input to your power amp. Ideally, the ratio should be 1/20. If you are unable to do the calculation, the best method is to use very low impedance interconnects. And if you do get into trouble, a buffer, such as the Musical Fidelity X-10D is specifically designed for these situations, though adding another active device into the chain may be less than desireable sonically.

Yep, agree with Kr4 and Viridian about the impedance matching a drive strength. I have 25' SE Mogami ICs myself, which are in parallel with a pair of 1.5m Nordost Valkyrja ICs. They sound great.