Supra EFF-ISL – Test-Winning High-End Cable with Locking Connectors

The Supra EFF-ISL is one of the market's most acclaimed analog interconnects, designed for audiophiles who demand flawless signal transmission. With advanced EFF (Equalized Frequency Flow) technology and exclusive locking PPSL connectors, it delivers a soundstage rich in detail, dynamics, and transparency. This is the cable that allows your system to perform at its absolute best.

Equalized Frequency Flow (EFF)

In conventional cables, audio quality is affected by the "skin effect," where high frequencies are forced toward the surface of the conductor, encountering higher resistance than bass frequencies. This results in phase errors and inconsistencies. Supra EFF-ISL solves this ingeniously by spinning the conductors around a plastic core, creating a tube-shaped conductor with a wall thickness of only 0.20 mm. This forces all frequencies to travel within the same area, resulting in a completely neutral and phase-correct signal.

Mechanical and Electrical Perfection

The cable is terminated with Supra's flagship RCA connectors: Supra PPSL. These are all-metal, shielded, and feature a unique locking function. By tightening the sleeve, you lock the connector to the chassis, eliminating the risk of loose connections and ensuring 100% secure signal transfer.

• Low Capacitance: Thanks to the PE (Polyethylene) insulation, the cable has very low capacitance, providing fast and transient-rich reproduction without rolling off the highs.
• Silver Plating: The oxygen-free copper (OFC) conductors are silver-plated, a superior conductor for high frequencies that contributes to the cable's airy top end.
• Semi-Balanced: The cable is wired in a semi-balanced configuration where the shield is only connected at the source end, effectively draining interference without being part of the signal path.

A Reference in Its Class

The Supra EFF-ISL is a consistent test winner that is frequently compared to significantly more expensive cables. It is the natural choice for connecting a CD player, DAC, or streamer to your amplifier when you want to extract maximum performance from your setup.

Specifications