Equinox Power Cord

Passive shielding can only attenuate noise. It cannot cancel it. The distinction is critical: attenuation reduces interference by a fixed ratio determined by the shield’s material properties and geometry, but the residual noise — however reduced — still reaches your equipment in the same waveform, the same phase relationship, the same spectral content as the original interference. It is quieter but not absent. The Equinox Power Cord takes a fundamentally different approach. It measures the noise in real time and generates an inverse waveform that cancels it at the conductor surface before it enters your power supply.

The active DSP module is approximately the size of a deck of playing cards and is positioned at the midpoint of the cable. Inside, a 32-bit DSP samples the power line at 1.2 MHz — twenty thousand times per AC cycle at 60Hz — characterizing the noise floor with a precision that no passive filter can match. The DSP computes the inverse of the measured noise waveform in real time and injects it through a secondary winding on the cable’s internal transformer core. The result is noise cancellation exceeding 40dB across the frequency range from 1kHz to 30MHz, which is the range that matters most for audio power supply performance. The module is powered parasitically from the AC line and adds less than 0.3W to the cable’s power consumption. A 1.1-inch OLED display on the module’s face shows live readings: total harmonic distortion of the incoming AC, RMS voltage, line frequency to three decimal places, and — because the DSP is network-capable via the USB-C port — the current NOAA solar flare index. The display updates ten times per second.

The conductor is single-crystal OFC: copper drawn as a continuous monocrystal with zero grain boundaries along its entire 1.5-meter length. This eliminates the micro-diode effects that occur at grain junctions in conventional polycrystalline copper and provides the lowest possible resistive path for current delivery. The semi-translucent fluoropolymer jacket reveals the triple-layer shielding beneath — mu-metal, copper braid, and conductive polymer — which serves as the passive foundation upon which the active cancellation operates. Surgical steel connectors with gold-plated contacts provide a termination that is both mechanically indestructible and electrically ideal. USB-C firmware updates are released quarterly, each incorporating updated noise profiles calibrated against the latest grid conditions and solar cycle data. The 300-hour break-in period is partially automated — the DSP continuously calibrates its cancellation algorithms during this period, converging on an optimal profile for your specific electrical environment.