After a nice science experiment I found out that the cat5e cable should be able to handle the amperage coming from the sound card. While listening to one song the max amperage I found was 20uA. That is 0.000020 A. At a max voltage of .9V for that song. (it fluctuated those were the peaks). So the power output was P=IV =(.00002)(.9) = .000018W or 18uW very tiny. According to this web site http://www.geocities.com/CapeCanaveral/Lab/9643/awg.htm
the 24 twisted pair in cat5e cable should be able to handle 2.38A.
thanks for all the replies