It probably is a wise rule of thumb to 'keep your interconntects long, and your speaker cables short'. Length is less of an issue with the low voltage signal. More so when it has been amplified.
Roughly, a 10awg wire is good for a maximum of 10'. Then a 12awg up to 30'.
Hint: so called 'high $ end' cables (and many other popular components with inferior specs) are produced by 'connoisseurs of coloration' adopting the theory that a playback system should modify the the signal from the source material to create a more 'pleasing' (to you) sound. If however 'true to the original' is your motive, then RadioShack Megacable will do the job. Use the money to upgrade speakers (not bigger necessarily, but more accurate, and room friendly).
Roughly, a 10awg wire is good for a maximum of 10'. Then a 12awg up to 30'.
Hint: so called 'high $ end' cables (and many other popular components with inferior specs) are produced by 'connoisseurs of coloration' adopting the theory that a playback system should modify the the signal from the source material to create a more 'pleasing' (to you) sound. If however 'true to the original' is your motive, then RadioShack Megacable will do the job. Use the money to upgrade speakers (not bigger necessarily, but more accurate, and room friendly).