Neptune Speaker Cables

Purist Audio Design's newest addition to our Luminist Revision is the Neptune Cable line. It is the pinnacle of our Fluid shielded cables! The speaker cables are crafted around fine single crystal copper strands in a 7 AWG bundle. In order to keep the speaker cables flexible, the positive and negative signals in a channel are separated (like what’s done for the Dominus and 25th Anniversary speaker cables) making it a four (4) cable set. Neptune cables deliver a larger soundstage over the Venustas cables with stunning detail in the mid-range!

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Custom for Your System

The audiophile aims for the highest quality and best sound possible. We offer the Neptune line in two different configurations, with customization available upon request:
  • Standard Speaker
  • Bi-Wire Speaker

These speaker cables come in a four (4) cable set, with an individual positive cable and individual negative cable for each channel.

The Neptune Speaker Cables come standard with:

  • Purist's newly designed interchangeable spade/banana.

These are our best connectors yet! They are crafted from beryllium copper with silver plating and then a final gold plating.

Spade/Banana

Or, you might consider:

  • WBT Spades
  • WBT Bananas

If your system demands a custom configuration, please contact us. We're able to custom-build to fit your needs. All Neptune Speaker Cables come packaged in a handsome soft case.

Need help deciding what your system needs? Try our free PDF!

Changing Your Spade or Banana

Click here for printed instructions.

Understanding Your Cables

Determine the Right and Left Channels
RightR
LeftL
Single ChannelL
Determine Positive and Negative
PositiveRed LeadPurple Lead
vertical biwire only
NegativeBlack LeadBlue Lead
vertical biwire only

Cable Specifications

Neptune Speaker/Bi-Wire Specifications
ConductorsSCC
MetalsCu
Dielectric MaterialP.E.
Gauge (effective)7 AWG
Dampening MaterialFluid
Current Capacity (DC)74
Resistance0.000999Ω/FT
Estimated Break-In Time300 Hours
Cable Diameter (Speaker)3/4 Inch
Cable Diameter (Bi-Wire)7/8 Inch
Connector TypeSpade/Banana or Custom
Material TreatmentTriple (3x) Cryomag©
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What They're Saying

"Big, spacious, warmer than leaner... though not in a way that is overly warm or ripe... the Neptune line is a whole lot of fun. Which is what we are hearing when we play music--not only from ourselves, but from many others passing through. You get the resolution and details, but not in an analytical, in your face presentation. Nothing is pushed at you, suggesting that the cables are quite even in terms of frequencies--that is, they are not hyped or rolled-off. There is neither a euphonic coloration or any sense of some anomaly to push this or that on our music. Balanced and musical. Sweet. Warm and musical."

"Ex-NASA engineer Jim Aud and his team have advanced their thinking, culminating in a reference fluid-shielded cable--the Neptune. It is the newest addition to Purist Audio Design's Luminist Revision series, developed partly in response to customer feedback to make the cables more flexible and user-friendly, while also increasing their performance. The Neptune comes in a four-cable set with positive and negative signals separated. The fluid shields the 7AWG bundle of fine single-crystal-copper strands from RF, EMI, and vibration. The shielding helped produce a huge soundstage with explosive dynamics in a system with Atma-Sphere electronics and Classic Audio loudspeakers."

"Showing with Ralph Karsten’s Atma-Sphere Novacron amps ($19,200/pr.), and the Purist Audio Design Neptune series of cables, there is no denying the synergy. I sat utterly rapt in Stevie Ray Vaughn’s guitar work, and simply have to marvel at the ability John’s speakers have to delve into and release music in one of the most dynamically and harmonically correct presentations you’ll hear."

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