This cable approach, in an attempt to tame your 803's so to speak, is a false and hopeless journey. Consider for a moment the following facts and let's see if we can make some sense of them, since at first they will seem in direct contradiction.
1) After setting up your HT, you observe after a bit, that the 803's have an edge to them.
2) You swap a set of cables, once or twice, and observe that they're starting to sound better.
3) You attribute this to something about the cables is causing you to like your speakers more.
4) None of the cables you've tried however, have sufficiently different L, C, R parameters to result in an audible FR shift though. Note that cjd's comment is spot on, but one would need a massive inductance change in order to affect an audible FR change.
Therefore, if the parameters of the cables you've tried are unable to effect an audible FR change, then one must ask the question, "Why is it that each time I change cables, the speakers sound better?" The answer quite simply is listener adaptation. Basically, you're starting to get used to the speakers. This is, in essence, what speaker break-in really is or for that matter, playing the cable swap game. Dealers and vendors know this which is why they generally start you out on lower priced models and move up the price scale. What they're doing is gambling that it'll take you a certain amount of time before you're finally used to the way the speakers sound in your room. Eventually you reach the point where your wallet is
just starting to hurt and that's the point, or one below, where you settle on a cable.
Regarding your speakers, I suspect that they are designed for a fairly uniform power response. In a Reader's Digest condensed explanation, this means they've got a fairly flat FR on and off axis, maybe to 30 degrees worth. Generally this results in a perceived brightness (or similar such terms) simply because the reflections are exagerating the high end. Now you could, if you're of a mind to, buy a software package like EFT and a calibrated mic and do what cjd suggested - analyze your room. OTOH, one can try a 'seat of the pants' approach and temporarily tack up thick, heavy blankets at the first reflection points to determine the width of the wall that needs treatment. One should also bear in mind that the ceiling is another spot and if you've got a coffee table in front of things, well that's another spot.
I'm assuming you've got a RS SPL meter and have also played around with toeing the speakers in a bit. You might find the use of a laser level to be a fairly inexpensive and accurate approach for setting the toe in.
And MikeInSeattle, who has so
GENEROUSLY recommended the Empress speaker cable line just happens to sell that line. How gratuitious and self-serving
Instead of saleshacking like this, which is a sleazy business model, why don't you contact the owners of AVS and pony up some advertising money. You can write it off on your taxes as a business expense, assuming you're even declaring this to the IRS. Sheesh!
