Long interconnect cables

I've got an 11' pair between my preamp and monoblocks, but the capacitance is extremely low on these cables. No problem.

The best place for the amp is between the 2 speakers. The best place for the components is far away. I'm running 6 meters with no ill effects.

XLR for long runs over RCA

I do not know the length threshold however

maybe someone else does

Is there a certain distance above which it may affect the sound?

A generally applicable threshold can't be defined, because many system dependent variables are involved. IMO, though, 10 feet is unlikely to be a problem in most systems.

Relevant variables include the output impedance of the component driving the cable; the capacitance per unit length of the particular cable; whether the interface is balanced (xlr) or unbalanced (rca); the susceptibility of the particular components to ground loop issues (particularly for unbalanced interconnections); the resistance of the shield or other return conductor in the cable (particularly for unbalanced interconnections); the rfi/emi environment; and the synergy or lack thereof between the sonic effects of the cable and the overall sonic character of the system.

Regards,
-- Al

I run 25 foot balanced to my front amps, not problem.