Equinox 10G SFP+ Cable

We spent years perfecting the sourcing, smelting, and drawing of equatorial copper to minimize hemispheric bias in our network cables. Then we asked a different question: what if we eliminated copper from the network path entirely? The Equinox 10G SFP+ Cable is the answer. It is a single-mode fiber optic link that carries audio data as pulses of light through a glass core nine microns in diameter. Photons have no magnetic moment. They have no hemispheric memory. They cannot be biased by the geomagnetic field, by household EMI, or by any other electromagnetic influence that plagues copper conductors. The hemispheric bias of this cable is not low. It is zero. Not approximately zero. Exactly zero. This is not a measurement. It is a consequence of physics.

The single-mode 9/125 micron fiber operates at 1310 nanometers — a wavelength selected for its optimal balance of attenuation and dispersion characteristics over the distances relevant to audiophile installations. At 10Gbps, the link provides more than sufficient bandwidth for any audio format currently in existence, including DSD512 and multichannel DXD, with overhead capacity for formats that have not yet been invented. The LC connectors are precision-polished to a surface finish that ensures consistent optical coupling across thousands of connection cycles, because even light deserves a clean interface.

Sold as matched pairs for bidirectional streaming, the Equinox 10G supports the full-duplex communication required by network audio protocols including Roon RAAT, UPnP/DLNA, and direct NAS streaming. Each pair is tested end-to-end with an optical time-domain reflectometer to verify that there are no micro-fractures, bends, or contamination points along the fiber that could scatter photons and introduce the optical equivalent of signal degradation. The maximum run length of 10 kilometers accommodates listeners whose network infrastructure and listening room are in separate buildings, separate wings of the same building, or simply far enough apart that copper ethernet was never a practical option.

But eliminating copper does not eliminate the obligation to shield. Every optical fiber exhibits evanescent field leakage — a portion of the guided light that extends beyond the fiber core into the surrounding cladding and beyond. This evanescent field is susceptible to perturbation by external electromagnetic sources: WiFi routers, switching power supplies, the very network equipment the cable connects to. The Equinox addresses this with triple-layer EMI shielding — braided OFC copper, mu-metal foil, and aluminum-mylar tape — achieving greater than 130dB of electromagnetic isolation around a signal path that carries no electricity. The shielding adds weight and rigidity, but the evanescent field leakage it prevents from being modulated by external EMI is, in our assessment, audible on reference systems.

The Equinox represents a philosophical inflection point in the Equatorial Audio cable range. Our copper cables minimize hemispheric bias through sourcing, geometry, and shielding. The Equinox eliminates the bias question but introduces a new one: if the signal is light, and light can be perturbed through its evanescent boundary, then optical cables require shielding not less rigorous than copper cables, but more — because the perturbation mechanisms are subtler and the tolerances tighter. For listeners who have followed the equatorial path from Tropic through Meridian, the Equinox is not an upgrade. It is a departure — from the medium itself, and into an environment where even photons are protected.