The Black Rhodium Blog
How the Laws of Physics influenced the design of our Chorale S
Black Rhodium Chorale S RCA stereo interconnect is high performance cable designed to deliver the maximum musical information in use.
Here is some of the history of its design, production and launch
The design of Chorale S RCA is based on a very thorough understanding of the Laws of Physics and the effects they describe. Black Rhodium has developed several effective engineering solutions that minimise the effects that the Laws of Physics describe to produce a cable that plays music beautifully through any audio system.
The seven Laws of Physics that are known to influence sound quality in a cable that carries an electrical signal representing music can be listed as;
In the design of Chorale S RCA we have taken great care to minimise each and every type of distortion separately by careful design and very extensive experimentation and audition.
Many of the design features of Chorale S RCA are based on proprietary innovations, based on extensive research and testing, exclusive to Black Rhodium and cannot be revealed in detail. Other features of design are based on classical electrical engineering practice extensively used in electrical engineering.
How we designed Chorale S RCA
The conductor wire in a cable carries the highly sensitive electrical signal that produces the music through your loudspeakers of headphones. The better the (sound) quality of the wire, the better the overall quality of sound in the cables and enjoyment of music played.
Over the years, Black Rhodium designer Graham Nalty has auditioned many different wires to learn how they affect sound quality. Whilst Precious Metals, such as palladium, platinum and Rhodium give the very best quality sound we have heard, they are simply too expensive.
We have used silver wire a great deal in our cables. This gives a very clear and clean sound, but silver is more difficult to get the last ounce of clarity when a large choir sings powerful high notes. In the end we have returned to a wire we have used before and we find superior to silver but a lot less expensive than the palladium wire we use in Cantata.
Deep Cryogenic Treatment
Our conductor wires are processed by a Deep Cryogenic Treatment that re-arranges the molecules in the wire in a way that produces a cleaner and more natural sound.
We have conducted many tests on the direction of wires when used for audio. We have found that when both wires in a stereo cable are cut from the reel to run in the same direction they sound slightly clearer and give the impression of a quieter background behind the music. We take great care to see that all wires we remove from reels is marked for direction before we use them.
Dielectric Absorption, in which electrical energy from a wire transfers to charge the insulation electrically and returns to the wire after a short interval of time, causes time smearing distortion that reduces clarity in the music. In Chorale S RCA we use a low mass insulation combined with air to reduce the dielectric absorption to audibly less than using the any of the more common insulating materials.
Radio Frequency Interference and Electromagnetic fields.
We have tested many different materials and techniques for screening. We have developed a highly effective screen that very substantially removes almost all distortion caused by RFI and EM I.
Micro-vibrations caused by electric field forces.
Chorale S RCA is vibration damped along its length by an effective damping material that has proved highly effective in the past. Additional its outer braid provides additional damping against external vibrations.
Design of Chorale S RCA stereo interconnect
Palladium wire has been chosen by extensive audition over many years and our best choice without taking the extreme expense of using Precious Metals.
Chorale S RCA is fitted with Graham Nalty Straight Line Contact GN4 RCA plugs. The Straight Line Contact between the return conductor and socket has been chosen from listening tests that showed straight Line Contact connectors can deliver a large uplift in sound quality compared to high quality connectors with a circumferential connection of the return conductor.
The GN4 plugs are plated in rhodium. In listening tests, rhodium plated connectors give a cleaner sound that can add excitement to the presentation of the music.
Further information on the Graham Nalty GN4 Straight Line Contact RCA plugs can be seen in: