(ahh, I shouldn't...)

To the original poster, if you honestly think those clocks do what the sales copy claims, you should know that you -- yes, you -- can collect $1,000,000 from the James Randi Educational Foundation if you can demonstrate that you can hear the difference under scientifically controlled conditions. JREF Challenge

I'd also suggest you look at some of the recent and highly useful threads posted here that discuss room treatment. There are much better materials available for this purpose than clocks.