Do both cables have to be the same length?

Same length.
Plus, it helps with resale.
B

It's not an issue of timing, but can be an issue of impedance and voltage drop differences if the cables are very different lengths.

NO! As the French Chef says "No diffawrance" between 6ft and 8ft!

There's unlikely to be an audible difference, but I agree with the idea to consider resale value, and that in the future you may want those extra 2'.

Best,

E

What happens if you get them mixed up? You know, left and right. Won’t one be to short and one to long. Just saying.. LOL Suppose you could return them and say they were made up backwards..
You know, just saying ;-)

Two 8s, one with a coil.

Regards

Cables should be a uniform length for best sound.