Wazzzup, I didn't ask you for your preference. I asked how do we tell a cable that affects the signal from one that doesn't? I gave a specific example. I'm looking for an interconnect to link an iPod Touch and a Fiio amp. Give me an example of a cable that drastically changes the sound, and one that passes the signal through audibly perfect please. Tell me how I can tell the difference by looking at the cable's design and/or specs.