Cardas RCA Parsec 1.5m

Heir to the Quadlink, the American brand’s best-seller for nearly thirty years, the Parsec is the first Cardas cable outside the flagship Clear range to incorporate Matched Propagation conductors. This technology, patented by George Cardas in 2010, was previously reserved for the most expensive models in the catalogue. The Parsec offers a specific implementation of it, combined with the brand’s historic sonic signature: warmth, musicality, and clearly articulated tone colors.

Conductors designed to synchronize signal and dielectric

The issue with traditional audio cables comes from a speed mismatch: the electrical signal travels through the conductor at the speed of light, while the charge accumulated in the dielectric (the insulator) propagates more slowly, at around 78% of that speed. This discrepancy causes a slight temporal smearing that blurs the micro-information in the signal.

George Cardas’ solution is to slow down propagation in the conductor so it aligns with that of the dielectric. How? By controlling the progression of the twist pitch of successive strands in a concentric conductor made of individually insulated strands. The result is a conductor whose propagation speed matches that of the insulator, eliminating the timing mismatch that affects conventional cables.

Golden-section construction

Parsec conductors use Grade 1 copper with 99.9999% purity, oxygen-free, with SPN (Litz technology) coating. The strands are arranged according to the 1.618:1 ratio, the famous golden proportion found in everything from Egyptian pyramids to seashells. This layout places the thinnest strands in the center, with increasing size toward the outside.

What’s the benefit of this geometry? Each strand is coupled to another whose resonance frequency is irrational relative to its own. Internal resonances cancel each other instead of adding up. Cardas refers to this as a “silent conductor.”

The Parsec RCA consists of a shielded twisted pair of 23.5 AWG conductors with a Kevlar core. Poly-e air tubes are tied together by a carbon-impregnated FEP tape. The outer layer uses compressed air tubes to keep the tinned copper braided shield at a distance from the conductors. The Alcryn (TPR) rubber outer jacket gives the cable greater flexibility than its predecessor.

GRMO connectors: brass, rhodium, and a tension spring

Cardas GRMO RCA plugs are machined from eutectic brass, a non-magnetic alloy. The contact surface first receives a layer of silver, then a flash of rhodium for durability. The outer shell is gold-plated. An internal spring system maintains constant tension on the center pin, ensuring a stable connection over time.

The cable’s outer diameter is 9.4 mm (0.370 inch), a compact enough size to fit easily behind most components, even in setups where space is limited.

Sound character and use cases

Cardas describes the Parsec as neutral with a touch of warmth. The midrange preserves the brand’s characteristic fullness, while the bass is faster and the treble more extended than with the Quadlink. Soundstage and dynamics also improve.

The Parsec fits into mid- to upper-level systems. It can serve as a first step into the upper Cardas range, or complement an existing system made up of quality components, where its slightly warm character will balance analytical electronics or speakers.

Technical specifications

Sound performance

• Signature: neutral with a slight warmth in the treble
• Transparency: very good for its price range
• Balance: warm midrange with extended bass and treble

Conductors

• Kevlar core
• Grade 1 oxygen-free copper, 99.9999% purity
• Transparent SPN coating (Litz)
• Sections calibrated according to golden ratio proportions

Geometry

• Shielded twisted pair with polyethylene air tubes
• Cross-braided layer
  • Wrapped in carbon-impregnated FEP tape
• Outer layer
  • Compressed polyethylene air tubes suspending the tinned copper braided shield
  • Alcryn rubber outer jacket

Insulation

• FEP wrap for protection and conductor separation

Dimensions and specifications

• Gauge: 2 × 23.5 AWG
• Outer diameter: 9.14 mm