I use something like this for cable management for my TV.
I painted it the same color as the wall, it only required a couple a screw holes, is inexpensive and it looks good.
It's available at Canadian Tire.
OP You have some good looking speakers but for the money, you could get a lot more.
But if you are happy with them, well, lucky you.
I am still getting this urge to grab the OP by the neck and strangle him whenever I read his sig. Cheez, is that the typical reaction you get from people you meet in real life?