Cardas XLR Iridium 1.5m
Overview
Successor to the Microtwin, the Iridium is the first cable in the Cardas range to feature Golden Ratio Litz conductors. This technical choice, usually reserved for the brand’s high‑end models, gives this XLR interconnect cable a unique position: an entry‑level product that benefits from the same fundamentals as the Clear and Clear Reflection references.
Star-Quad construction and Golden Ratio conductors
The Iridium uses four 24.5 AWG conductors arranged in a Star-Quad geometry, a configuration that promotes the cancellation of electromagnetic interference. Each conductor consists of Grade 1 OFHC copper strands with 99.9999% purity, coated with an SPN (Single Poly Nylon) insulating varnish. This Litz technology, which insulates each strand individually, reduces skin effects that can degrade signal transmission at high frequencies.
The strand sections follow a progression based on the golden ratio (1:1.618 ratio). The thinnest wires are placed at the center, with an increasing diameter toward the outer edge of the conductor. This concentric arrangement, patented by George Cardas in the 1980s, is designed to attenuate micro-resonances between strands.
Hybrid shielding for noisy environments
The cable combines two protective layers against interference. A tinned copper spiral surrounds the conductors, complemented by a carbon-impregnated PTFE tape. This combination offers protection against both radio frequencies and low-frequency electromagnetic disturbances.
The FEP (fluoropolymer) dielectric and PTFE tape provide insulation between conductors. The outer TPR jacket, 7.62 mm in diameter, remains flexible and easy to handle, a notable improvement over the Microtwin, whose stiffness could sometimes complicate installation in confined spaces.
Neutrik XLR terminations
The Neutrik connectors on this XLR version are hand-soldered in the Cardas workshop in Bandon, Oregon. Terminating Litz conductors requires specific work: the insulating varnish on each strand must be burned off with flux before soldering, a manual operation that partly explains the higher cost of Litz cables compared with bare conductors.
A slightly warm sonic signature
The Iridium’s tonal balance leans toward a presentation that is slightly warmer than strict neutrality. The midrange is full and textured, the treble remains natural and free of harshness, and the bass is articulated with solid support in the upper bass. This character suits systems that would benefit from a bit more roundness or whose top end lacks sweetness.
The flip side of this signature: resolution in micro-details and bass dynamics that do not reach the level of the Clear models. For an already warm system, the cumulative effect might lack openness.
Technical specifications
Connectivity
- Standard terminations: CE XLR
- Compatibility: stereo and home cinema applications, entry to mid-range
Conductors
- Grade 2 oxygen-free copper (99.99% purity)
- Transparent SPN coating (Litz technology)
- Cross-sections sized according to golden ratio proportions
- Multilayer cross-field geometry
- Insulation in a polyurethane sheath
Geometry and construction
- Twisted pair with natural cotton filler
- Assembly held together by FEP tape
- Spiral shielding in tinned copper
- Outer PVC jacket
Dimensions
- Gauge: 2 × 20.5 AWG
- Outer diameter: 7.69 mm
Sound performance
- Warm, forgiving sound signature
- Detailed, musical reproduction
Frequently Asked Questions
What is the difference between the Iridium and the Microtwin it replaces?
According to Cardas, the Iridium delivers more precise imaging, better-quality terminations, and a much more flexible TPR jacket. The four-conductor Star-Quad geometry replaces the Microtwin’s twisted pair. The hybrid copper/carbon shielding is also an evolution compared with its predecessor.
Can the Iridium XLR be used with unbalanced (RCA) equipment via an adapter?
Technically yes, but this conversion cancels out the advantages of a balanced connection (common-mode noise rejection). If your equipment only has RCA inputs, the RCA version of the Iridium with Cardas GRMO connectors will be more appropriate.
Which Cardas cable sits above the Iridium in the range?
The Parsec occupies the next level up. It features Matched Propagation technology, which synchronizes the signal propagation speed in the conductor with that of the dielectric. This technology, absent from the Iridium, is a hallmark of the Clear and Clear Reflection ranges.
Is the Iridium suitable for studio use?
Its slightly warm signature may not fully align with the neutral monitoring requirements of a professional studio. For a home studio or pleasure listening, however, its musicality and non-fatiguing character can be appreciated during long sessions.
Does Cardas make other products in the Iridium range?
The Iridium range also includes speaker cables, phono cables (RCA to RCA or DIN to RCA), and power cables. All share the same Golden Ratio Litz conductors and are manufactured in the United States.
- Eco-contribution included in the sale price.