Can anyone explain cable risers?


Can anyone explain why cable risers do or dont work to improve the sound. Thanks.
tbromgard
Nonoise,
I agree with your statement concerning the effect of synthetic carpet. When my cables are lifted off that surface there`s an improvement in clarity,or as you say less smearing. The change is subtle but consistent.I can`t comment on other flooring materials.
Regards,
Post removed 
I use plastic-pipe couplers.

http://i89.photobucket.com/albums/k220/jeffreybehr/Room/12Sep2012_frontfloorcable_1200h.jpg
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http://s89.photobucket.com/albums/k220/jeffreybehr/Room/?action=view¤t=12Sep2012_frontfloorcable_1200h.jpg
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Tried some home-made ones. Couldn't tell the difference with or without. Try it yourself. You'll never know...