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Copper Link RCA Connector

The ETI Research Copper Link RCA Connector is purpose-designed to incorporate cutting edge, premium grade audio technology at a mass market price point.


The Copper LINK RCA is an update of the legendary ETI Bullet. Still the low-mass design and Gold Plated with the signal pin being machined now from OCC (1100 series Copper) that due to the crystal structure offers IACS rating of 102%.With this improvement, you can get even greater transparency and less interference than other RCA connectors on the market.

ETI Research is the originator of the star grounding design and has a lower mass than any of the copies on the market. The hollow design enables walls with a thickness of 0.6mm on the signal pin, giving you the capability to solder the wire at the very top, which eliminates the signal from going through as much mass as on other star grounding designs.

Since the return pin features a very low-mass design, making it from ordinary Hardened Copper would not give the strength or durability required for soldering and everyday use. Therefore, the Copper Link RCA Return Pin is made from Tellurium Copper, which maintains the connection strength needed to last for years and years without breakage or degradation of audio quality.

The housing of the unit is now made from aluminium. When we first started making the original Bullet we did not have to worry about all the electromagnetic radiation that is now floating around our audio systems. But today, with all the processors and switching power supplies commonly used throughout the industry, our audio systems are in a bath of noise.

This shift in industry adoption of contributors to EMI necessitated the change to Aluminium because it has very good EMI/RF noise rejection so as to keep your signal as clean as it possibly can be. Also with the Body of the connector inside the Housing, you get even greater isolation from all the noise.

The ETI Research Link RCA Connector now has twin strain relief screws to keep your cable and the connection away from all the plugging and pulling stress many of these connectors are exposed to.

ETI Research Copper Link RCA Connector features:

  • Signal Pin machined from OCC Copper with 0.6mm thin wall
  • 1100 Series Copper signal pin with Tellurium Copper return
  • Black anodized aluminium housing
  • The Body sits deeper in the Aluminium Housing to offer greater noise isolation