@bkeske interestingly, everything i’ve heard says the complete opposite - that the IC’s should be kept as short as possible while speaker cables - which carry a very weak signal, can be much longer.
<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>
NO OP the speaker cable need to be short, not the line level, no one here is giving you bad advise.. The heavy load is the Speaker cable, and the power cord for the power amp, not the line level amp feed.. You literally got your wires crossed. But 4 foot cable off a stereo isn't gonna happen either.. 2 or 3 meter will work though..
I use 2, 3 and 4 meter cables. not in the same room.. Great cables though, are gonna be the same length..
This is not a surround system...
Do what you will, but running longer speaker IC will degrade speaker performance. The question is, will you hear it? I can tell the difference in a 1 meter and a 3 meter of the same construct.. I have used .5 meters and gone to 1 meter and gotten better results on SS amps.. Same construct. There is TOO short.. in some cases.
Zip cord who cares double the run for each one (20 x 2) and (8 x 2) used #12 save your money..
Regards