cable & accessory RCA Plugs

Sieveking Sound RCA caps

Sieveking Sound RCA end caps 10 Pieces

The Sieveking Sound RCA end caps are a sensible accessory for all unused analog RCA inputs and outputs of HiFi components. The caps are made of pure copper and coated with gold in a vacuum-deposition. Inside there is an additional Teflon liner. This unique combination allows outstanding high frequency absorption.
The RCA end caps are fitted over unused inputs and outputs of hi-fi components and there fulfill three important functions.
While the functions 1 and 2 (see below) have an impact especially on the long term durability of the device, the function of three is actually audible. The reduced radiation of RF signals affects in the form of a lower noise floor. The music is clearer and, amazingly, the listener often has the feeling that the music signal is now suddenly become silent. This is a psycho-acoustic illusion, because we associate the reduction of noise initially with a smaller volume.
Particularly clearly the before-after effect is when you have heard a few days with the end caps and these removed: The sound suddenly seems undefined and less present.
The strength of the improvement in sound is heavily dependent on the components used. Devices with Tubes and hi-fi systems to speakers with high efficiency respond clearly than transistor amplifier with high negative feedback to speakers, large amounts need electricity.
Regardless of the size of the impact on your music enjoyment Sieveking Sound Caps are an ornament for your investment and an investment in long-term Hörfreuden with your quality components.


  • protect the unused connection from corrosion
  • prevent the entry of dust into the unused RCA jacks
  • prevent the penetration of high-frequency radiation into the device
  • 10 piece with box
* Prices incl. 19 % Tax excl. Shipping costs, ** suggested retail price
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