For the sake of learning and understanding; let's say you take a very long speaker cable, but you completely overdo it to make it more obvious - not 6 feet but 60 feet longer than recommended for the gauge. Signal starts deteriorating, weakening, and you really drive this into the red, what are the expected effects? How does a weaken signal sounds like? Is it some hum, noise, static, like radio, does it start losing lows or highs...?
I’d like to do a test but wouldn’t go buying cable just for the sake of it.