Cable supports on the cheap...

I have found that when my system was in the basement, I could easily hear a difference ,  but now that my system is upstairs, it makes no difference at all!  Dollar stores are a great place for finding what you need.  you can use pretty much anything that’s not metal to lift you speaker cables off the floor.

When I first tested this I took paper towel and toilet paper insides and cut them down to a few inches then cut out a groove in the middle and set them up to get my cables off the ground.  Using the paper towel cylinder allowed me to cut different heights.  This worked and I used this for about a year then I upgraded to the Audioquest Fog Lifters.

+2 Toilet paper tubes.

Rebar chairs or risers, $37 for 200 chairs. 

According to Synergistic research aluminum is the material of choice. 

cable riser demo

these aren't on the cheap: but Money back guarantee- I didn't hear a difference on my macbook with my $2 dollar speakers and $10 DAC :) 

But this would be an easy blind test- for those of you whose computer is hooked up to your hifi- have someone else hide the computer from view, and have them click the video back and forth on the with/without risers sections and see if you can tell the difference 9/10 times.