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Cable Insulator RCI-3H

A new improved version of the highly regarded RCI-3. Now, fine mahogany and hickory woods are used to encase a blend of natural ores creating natural and organic tone.

Cable Insulator[RCI-3H]

Accepts cables size up to


  • 2014オーディオ銘機賞グランプリ2014 Audio Accessary Excellence Award Grand Prix
  • ビジュアルグランプリSUMMER20132013 SUMMER Visual Grand Prix
  • Visual Grand Prix 20092009 SUMMER Visual Grand Prix
  • Audio Excellence Award2009 Audio Excellence Award

Principal & Structure

The purpose of a cable insulator is to prevent cables from being influenced by vibrations from the speaker.

Most conventional cable insulators (or stabilizers) are made from a single material. So even if the cable is lifted from the floor, they will generate their own resonance which will inevitably induce coloration.

RCI-3H is an evolved version of RCI-3 which has been highly reputed till now. We have now adopted a combination of highest grade Hickory and Mahogany to create a natural and organic tone.

In addition, inside the insulator is a blend of natural ores which absorb electromagnetic waves and radiated noise from the cable.

Because of its combination of resonance control and noise absorption abilities, the RCI-3H will dramatically improve sound in a manner never before achieved by conventional cable insulators. Noise is dramatically reduced, sound stage and imaging are more focused and three dimensional, smooth and organic tone and vivid and dynamic sound is achieved.

Structural diagram of RCI-3H

How to use RCI-3H

Using more and more RCI-3H to lift cables up from the floor or the rack will improve transparency, three dimensional impression and texture of the sound, but using even one RCI-3H for a power cable will have a great effect.

The reason is that power cables are not only affected vibration from the speakers, but is also generating its own vibration by the electric power flowing, which leads to distortion and loss in voltage.

In addition, power cables release strong radiation noise which badly affects the surrounding cables and equipments.

As RCI-3H actively restrains vibration by electric flowing and radiation noise generated by cables, S/N ratio and distortion are drastically improved by a kind of rectification effect.

Many audiophiles already use short cables that don’t touch the floor or employ some method to keep the cables floated off of the floor or rack. Even in these cases, using the RCI-3H is very effective.

This is because the resonance control structure and electromagnetic wave absorbing characteristics of the RCI-3H are very powerful. You can expect a dramatic sound quality improvement by using the RCI-3H Cable Insulator.