Speaker cable vs. interconnect cable length

Think about the length of line level signal cables used between microphones and recording equipment. Fifty feet or more. Obviously not a problem unless you have lousy wire or high impedance outputs.

Besides, having long interconnects qualifies you to argue about Balanced/Unbalanced.

Tonyptony...If you use rca inputs/outputs (with an adapter)the interconnect will be an unbalanced interface even if the wires and XLR connectors are configured for balanced use. When balanced interconnects are used in unbalanced mode signal pin(-) is just grounded to the shield.

Tonyptony...You will get all kinds of opinions on this. Mine is that if your preamp has output impedance of about 100 ohms or less (ss usually runs around 50 ohms) long interconnects should be no problem. For tube circuitry, where 600 ohms is not uncommon, I would keep the interconnects to less than about 8 ft.

If it were me I would go with the 20 foot interconnects.