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Originally Posted by Manic!
What specs do you need to know?
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It's the cable itself, such as the electrical and physical since it gets to details like the ohm, shielding and insulation details. Hard to explain it since it gets really technical and I do understand some of the technical information at the high level to know what it means.
With enough understanding to know, one can determine if the cable meets or exceeds the standards for its intended purpose (ie. for RF, Speaker, Composite, HDMI etc...)
Generally with the cheap cables, they don't necessarily meet the specs (or barely) of what the cable is intended for (ie. the impedance of the cable not in spec). This can affect the signal quality which would affect the audio/video/data transfer and could be more noticeable if factoring in distance of the cable as well.