Shunyata Research Python Zitron 1M RCA Interconnects

I am selling a pair of 1M, RCA Shunyata Python interconnect cables in excellent condition. 

I have been using these in my main system for several months and have found them to be great-sounding cables. I decided to convert to XLR connectors and so Python RCAs are going out and Python XLRs are coming in. Otherwise I wouldn't be selling.

When they were introduced in 2012, the Pythons had the same key Shunyata technologies that Shunyata's top of the line cables had (Anaconda). These included virtual tube geometry(VTX) and signal propagation distortion reduction (SPDR, a.k.a. “Zitron”). In 2017, Shunyata launched a new generation of cables (Delta, Alpha, Sigma) with Sigma being the best and the most expensive.  In the new line-up, only Alpha and Sigma have both Zitron and VTX.If you want top-sounding interconnects that benefit from Shunyata's two key technologies, you can get them at fire sale prices in the Python line.. 

Here is a summary of the technical features used in the Shunyata Pythons taken from a 2012 product description:

SPDR

Shunyata's Python Interconnects are the first product to introduce the Signal Propagation Distortion Reduction (SPDR) technology. The SPDR science dwarfs the performance impact of any other material, geometry or design traditionally associated with the manufacture high-end signal cable products.

Cohergenic Conductors
Shunyata uses a specially designed electromagnetic field to align the molecular structure of their copper conductors. Applied during the extrusion process, the result is greater coherency and superior conductivity.

Alpha Cryo Process
Shunyata Research cryogenically treats all wire and electrical contacts used in the production of its signal cables. A state-of-the-art computer controlled chamber is used to lower the temperature of the contents to -320 degrees Fahrenheit. This exclusive process uses a proprietary combination of gases to enhance the cryogenic treatment.

CDA-101 Copper
CDA-101 copper is the highest purity copper available, with signed certifications to verify its authenticity and purity. Shunyata Research exclusively uses CDA-101 copper for their electrical products, from signal cables to power cords and power conditioners.

VTX Wire Geometry
Long known for ultra-complex wire geometries which measurably improve conductivity and desirable characteristics, Shunyata has developed a new geometry which greatly reduces the so-called “skin-effect”. Skin-effect is a distortion caused by differing speeds of conductivity between the center of the conductor (where the bass travels) and the outer part or skin of the conductor where the midrange and treble travel. Skin-effect plagues both stranded and solid core wire, causing smearing, timing and phase errors, in some cases even changes in tonal balance. The ideal conductor is a hollow tube, but this is wildly impractical in the real world, so using DTCD analysis, Shunyata created a new type of wire geometry which is a “virtual tube” greatly reducing skin effect and improving conductivity. 

If you are interested in reviewers’ comments, here is a short excerpt from a review published by Renaissance audio:

The gulf in performance between the Python and any other high-end cable is evident upon evaluation. The reason for this is simple; Zitron technology confers dramatic measurable improvement to the performance of each of Shunyata’s three Zitron signal systems, including vanishingly low measured impedance and an almost perfect square-wave response — unheard of in the world of signal cables.