CAT5's, like any other cable, need a good amount of burn-in. It sounds like you've had some time with them, so that's probably mostly accomplished already.
From my experience there is a smearing of the sound with CAT5's. There are several other fairly easy to build speaker cables that are inexpensive relative to the commercial one's.
Look into Jon Risch's 89259 cross connect. It far surpassed the CAT5 in my system. Go to AudioAsylum.com and look in the FAQ section for the link.
Enjoy,
Bob
From my experience there is a smearing of the sound with CAT5's. There are several other fairly easy to build speaker cables that are inexpensive relative to the commercial one's.
Look into Jon Risch's 89259 cross connect. It far surpassed the CAT5 in my system. Go to AudioAsylum.com and look in the FAQ section for the link.
Enjoy,
Bob