For those new to the thread/discussion of the Schroeder Method I will add to celander's informative post that consideration must be given to the halving of the impedance of the cables. Previously discussion in my original article as well as in threads has pointed out that some components, i.e. DACs which have output directly from the DAC chip, may not be able to drive cables with lower impedance. I have only used 1m length and colander has used 2 foot length. As usual, consulting with your manufacturer about such things as length of the interconnects and typical impedance is important.
For instance, a 1m Schroeder Method setup has a source seeing an impedance like a 2m cable. Obviously the longer the interconnect the more potential for an impedance problem for a source's output. Perhaps I am not stating this as elegantly as I could; some here such as Al could confirm or clarify my description.