You might want to try this with Cat5E plenum rated cable as it is lower capacitance than Cat5. (Always use plenum rated cable if you are running through walls...it is a safety issue regarding the flammability of the insulation.)
DIY Cat 5 speaker cables....
Hello all you fellow audiophiles, I Want to know if you think its a good idea to make some DIY cat 5 like the chris VenHaus ones. I heard that they have a large capacitance. And can cause an amp to ru hot or oscillate. I have a NAD C-370 and i dont think that i would have any poblems, but i just want to make sure. Also what do you think of this DIY cable? I would make a 10-12' Pair and i dont wanna spend a 100 bucks and hours making these is they wont work. Thanks all