Doug Schroeder Method, Double ic

Oddly what you are doing makes sense to a degree.  I know nothing about the interactions of cables and gear.  As in why it happens.  Only a glossy idea of why it occurs.  Ok, I'm uneducated.  Now that that is clarified, I have made the following observations.  I have connected some interconnects between my DAC and preamp, as well as between my Preamp and amp.
One set of interconnects is the Inakustik NF2404
One set is the Genesis by Gary Ko
The other is an inexpensive coax interconnect.

Here is what I observed. 
Between the DAC and the preamp the coax and the Inakustik are hard to tell apart. The Inakustik is better, but not by much. The Genesis is an OMG that is great.  The world opens up.  I use the Genesis there.

Between the preamp and amp the coax, Inakustik and Genesis are hard to tell apart but they are different.  The Genesis is a little thin, so I keep it where it excels.  The Inakustik is more fleshed out and full.  Very clear and accurate.  Pretty neutral but very full.  I like that so it stays between the preamp and amp.   The coax is just there.  Nothing special but pretty darn good for $250.  It is not as clear as either the Genesis or Inakustik.  There is some haze and cloudiness to it.  It is not in use.  

The Genesis is designed around 2 wires on the positive and 1 on the negative. Kind of like your doubling up of interconnects.  Different but similar.  The Inakustik is 2 wires in an air dielectric spread very far apart.  About an inch plus. Totally different geometry.  I am sure their inductance, reactance and capacitance and radically different.  I assume that is why the results based upon where they were used if quite different.  If I were to do a review on either the Genesis or Inakustik and I based the finding on one topology alone, I might find either cable inferior.  If I used the cable in another area, I might find it heavens sent.  Interconnects are tricky business.  It's hard to tell if you are going to get the same results as someone else who raved about them.  From what you are all saying and the links included say, it seems cables are very system dependent.  

Thanks for validating this idea for me.  I got in a fight with one vendor over this very issue and feelings were hurt.  Now I  can't get any more cables at discounted pricing.  I'm just another chump having to pay list price. For that brand at least.  Owe Well.  I really don't need anymore unless I purchase a tape machine.
Rex

@kingrex Your description of the design of the Genesis IC is indeed “different but similar.” The Canare Starquad cable design is even more similar to “Schroeder Method configuration.” The Starquad design has 2 hot, 2 returns and 1 shield. In the Schroeder Method configuration, however, everything (including the shield) is doubled and configured in parallel.

What do you think is being filtered that is improving the sound?  What other ways do you think you could achieve the same ends?

All: I’m adding to my last prior post here to provide more context to the Canare Starquad story and their wiring scheme. As one can see from their wiring diagram, their 2 hot conductors are sliced together in parallel.  Likewise, their 2 return conductors are spliced together in parallel. Note one common shield element, however. 

http://www.canare.com/uploadeddocuments/cat11_p35.pdf

@kingrex I don’t think anything is being “filtered.”

Some speculate that the improved sound qualities perceived during even casual listening sessions is attributed to the parallel configuration having nearly twice the bandwidth of their single-run counterparts, with the attendant reduction in internal reflections for electrical signals transmitted through the parallel configuration relative to their single-run counterparts.

I’m not aware of other ways of achieving this effect. If the “increased bandwidth” speculation is the correct attribution to the audible improvements in reproduced sound, then interconnect designers should devote their energies to designing cables having the greatest bandwidth possible. But even then, implementing the Schroeder Method to those cable designs should yield further improved sonic benefits over their best single-run counterparts.