RCA Interconnects - Max Length

I don't think an all-purpose specific answer can be defined. It depends on the output impedance of the component driving the cable (the lower the better), on the capacitance per unit length of the cable (the lower the better), on the susceptibility of the two components to ground loop issues, on the resistance of the shield or other return conductor in the cable (which in turn can influence ground loop susceptibility), and on how AC power distribution is configured in the system (which in turn can also influence ground loop susceptibility).

Regards,
-- Al

My guess is that in most cases that would work well. FWIW, I've had fine results with 12 foot runs under similar circumstances, although with just a single dedicated line for both the preamp and a stereo amp.

Best regards,
-- Al