Do better RCA cables make a difference?
RCA cables do make a difference due to them being high-level signal cables that are analog. Due to this, they are susceptible to noise and interference and the only way to overcome this is to use high-quality RCA cables, keep them short, and away from other audio equipment.
Does good RCA cable Quality Matter?
Speaker and RCA interconnect cables should serve two key functions: to pass the audio signal with absolute purity at full fidelity and to reject interference that can add noise to the signal. A high quality cable lets your system perform its best, while remaining faithful to the source material.
How long can an RCA cable be before it loses quality?
Composite RCA – 100 feet (regular); 250 feet (with extender)
Being analog, the image quality can degrade at longer lengths but the loss is not noticeable at 100′ or shorter. It is possible to go up to 300′ with a regular cable, but the quality level will vary.