SKU: 27772101703

Inakustik Referenz NF-2405 AIR RCA Interconnect Cable

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Description

Inakustik Referenz NF-2405 AIR RCA Interconnect CableNF 2405 AIR RCA Breathtaking sound thanks to air insulation we have already created many innovative designs on the way to perfect insulation, such as DUO PE insulation or PETS (PE Tube Support). The Referenz NF 2405 cable is another true milestone and an absolute world first in the cable sector. Normally, the conductors are kept at a distance from each other by more or less high quality filling and insulation materials. With the NF 2405, however, the

NF-2405 AIR | RCA

Breathtaking sound thanks to air insulation - we have already created many innovative designs on the way to perfect insulation, such as DUO-PE insulation or PETS (PE Tube Support). The Referenz NF-2405 cable is another true milestone and an absolute world first in the cable sector.

Normally, the conductors are kept at a distance from each other by more or less high-quality filling and insulation materials. With the NF-2405, however, the conductors run through a series of clips connected in series, which form the inner framework and give the NF-2405 exceptional flexibility for high-end cables.

The NF-2405 is manufactured entirely in Germany, like all speaker and audio cables in the Referenz series. The clips are assembled by hand with meticulous care in the company's own factory and then the Cross Link super-speed waveguide is threaded in. After this, the resulting air helix is also shielded by hand and given a PE network jacket before the finished cable is assembled using the RCA plugs we developed ourselves.

New RCA SL connector: Soldering is a reliable and well-established joining technique, but it has its drawbacks. Disadvantages include the presence of poorly conducting solder in the signal path and the emergence of low thermoelectric emfs. With the SL RCA Plug developed in-house, the connections from the signal conductor to the contact elements are precisely pressure-grouted together using a force of 1.5 tonnes. A further seemingly tiny improvement that brings great rewards in terms of audio performance.

To the point

AIR Helix

The Air Helix architecture enables the signal conductors to run freely suspended through the length of the cable and permits signal conductors to be insulated to practically 100% by air.

The dielectric

Using air as a dielectric lowers capacitance to a minimum. In comparison with other insulators, using air as a dielectric leads to no increase in capacitance and creates no dielectric losses.

Multicore structure

By cleverly arranging the conductors in the multiply nested multicore structures, overlapping magnetic field areas are created that significantly reduce inductance.

The conductors

The Cross Link Super Speed waveguide avoids so-called skin effects and delivers a balanced sound, even with complex music passages and high volume levels.

RCA SL connector

The RCA-SL connector of our fifth generation Referenz AIR cable NF-2405 is now also pressure-grouted from signal conductor to contact elements with 1.5 tonnes.

Thanks to the Air Helix design, the conductors run freely suspended through the length of the cable.

The Air Helix architecture permits signal conductors to be insulated to practically 100% by air. Special clips were developed to provide the supporting framework. Positioned at defined intervals inside the cables, these clips keep the helically-arranged conductors apart. Cable flexibility is assured by means of two struts that ensure the clips remain together but also at a precise distance from each other. This architecture is unique, bringing low capacitance and minimum dielectric losses – a true milestone in the search for open and unadulterated sound.

Our physical approach: Minimize losses for true-to-original playback.

Our Referenz AIR cables transport audio signals between source, amplifier and speaker in an authentic way and with a minimum of loss. You can enjoy music that precisely expresses the emotions of the artists at the time of recording – sensual, subtle, light-hearted or orchestral right through to full-blooded and rocking. Vocals and instruments are delivered in unadulterated form. Everything remains vibrant and full of emotive energy. Favorite tracks and pieces continue to trigger strong feelings even when you’ve heard them a hundred time over.

Point-to-point Air Helix for end-to-end connections

A new feature in the 5th generation of in-akustik’s Air Helix architecture is the point-to-point connection. Specially designed transitions are available for each type of cable and connector. Across the complete length of the cable – point-to-point AIR Helix. It may sound trivial at first, but the results are impressive. Sound signals are transported with minimized losses, right through to the final centimeters. The sound is more detailed and dynamic than even before.

The conductor structure

The Cross Link Super Speed waveguide avoids skin effects caused by eddy currents in the conductor. Thanks to the braided structure, the waveguide is able to precisely transport even extreme current peaks. A lacquer coating around each wire prevents eddy currents within the conductor and protects against oxidation. All this results in a conductor that delivers a balanced sound consisting of vibrant and never overemphasized timbres, even in complex musical passages and at high volume levels.

The conductor material

The conductor material is a crucial factor for the transmission of sound signals. Any contamination worsens the conductance and increases the background noise. We only use pure, oxygen-free copper in our AIR cables. We ensure that only carefully selected batches of pure copper are processed. We take great pains to measure the quality of the copper before it is sent to the mill for drawing to the required cross-section over the course of a multi-stage process.

The shielding

EMC interference, from sources such as mobile phone and WiFi networks, is constantly increasing. This interference impairs the sensitive audio signal. Interference occurs when signals of different frequencies overlap. This can result in unwanted distortions that have nothing to do with the original signal. Dense shielding is therefore essential to protect the extremely sensitive music signals from this interference so that even the finest details are preserved.

Cable manufacturing unit

The beating heart of in-akustik is our manufactory. This is where our success story is rooted – permeated by a congenial working atmosphere, a love of music and a passion for detail. At in-akustik, we believe musical enjoyment stems from a listening experience that remains as close as possible to the original recording and the artist’s interpretation of the piece. That’s why we boast a committed workforce that combines curiosity with a keen sense of precision. With a fascination for music and things that are really special – like the development of our complex AIR cables.

Handmade

Each cable is handcrafted with the utmost care. Our extensive know-how and the qualifications of our team enable us to manufacture the complex cables in a customized manner. Apart from the finest of materials, our most important resource is the manual dexterity of our cable assemblers. In assembling our outstanding cables, they demonstrate meticulousness, composure and dedication.

Rigorous quality control

We manufacture in accordance with the highest standards. Rigorous quality control is carried out before, during and subsequent to assembly. We verify the tolerances of ever individual component. At every stage of manufacturing, we check the configuration and electrics for short-circuits. We also conduct functional and mechanical testing. No product leaves our manufacturing unit without a final quality check.

Did you know...

...that our NF-2405 AIR (2 x 1.5 m) is made up of 195 individual components? The copper wire used is 1109 m long, and the PE monofilament is 388 m long. Containing 296 drill holes, the Air Helix design of this cable type demands great dexterity on the part of the assemblers when they’re threading through the conductors.

RCA SL connectors (SolderLess)

Soldering is a reliable and well-established joining technique, but it has its drawbacks. Disadvantages include the presence of less conductive solder in the signal path and the emergence of low thermoelectric efms. The RCA-SL connector of our fifth generation Referenz AIR cable NF-2405 is now also pressure-grouted from signal conductor to contact elements with 1.5 tons, like all other Referenz AIR cables. A further seemingly tiny improvement that brings great rewards in audio performance.

Rhodium-coated

The best cable requires optimum connection technology. We use tellurium copper, a harder metal alloy that maintains the high conductivity value. Much superior to that of brass connectors. The rhodium coating ensures long-lasting contact and corrosion resistance. The stable conductivity is even maintained with frequent conversions. This is better than gold contacts, which wear out quicker.

Pressed contacts (1.5 tonnes)

The contact elements of the connectors are pressed directly into the conductor material using a special tool with a force of 1.5 tonnes. This creates a stable and reliable connection without the use of solder or ferrules. Transition resistances and negative effects are avoided to ensure optimum signal transmission.

Shipping Notes
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 27772101703

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Reviewed in the United States on February 14, 2026
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Lake Worth, US
★★★★★ 5
MUFON vs. Stephen Greer
Format: Paperback
How it relates- this book was once sold (now out of stock) by mufon on their website- out of the many books that could've been chosen. I see a lengthy review by an obvious Stephen Greer fan. I, too, have seen his films. I was also once a member of Mufon in which paying that membership fee allowed me the extra little bit of privilege to attend web seminars/ community zoom meetings. I participated in some of these meetings to fully feel and understand what I was paying for, honestly. I joined mufon as a Stephen Greer fan myself so I was excited to use the opportunity to ask others of their thoughts about him and his films during one of these meetings. What I got was silence and if anything, a slight scoff. He was quickly dismissed and I was left with my own conclusion. This book is like most say- very interesting. I think both the author and Stephen Greer may have some things right but but all. My first instinctive question about this book was "how does he know this?" Right out of the gate, I'm assuming it's pure sci-fi but he does provide some backstory. Well, his work is comprised of others accounts. It can be unnerving when it comes to the malevolent species. If I had to pick a side drawn from my own conclusions- it would be MUFON over Dr. Greer because if there are malevolent species, you won't catch me in the open air shining lasers and telepathically calling the closest craft to come down and visit, blindly welcoming. Some close encounters and abductees are horrified by their experience and live through a lasting trauma. If you peruse the national ufo reporting center website, you will see reports of different crafts and behavior. One could interpret this as different levels of curiosity or.....various agendas. The universe is infinite as far as we know- beyond our humanly knowledge and capabilities. We haven't even fully explored our own galaxy. If we have the ability to be malevolent at times, what human can really say there's not another life form like us? Another life form that relies on food (other life forms) for energy? We all know what can happen when we get a little hungry. We all know the greed that can came from the demand and price of natural resources. Could other species scout the Earth just as we are racing for resources on the moon? There should be no limit to possibilities so I can only stay open minded. BOTTOM LINE- 100% would recommend as a read. It's different from the others when you want a refreshing change in format. No long stories so you can pick up anywhere- almanac style. A reference guide for alien races that can be quite entertaining!
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Reviewed in the United States on August 20, 2024
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Joseph J. Truncale
Port Orchard, US
★★★★★ 5
An interesting and fun to read book for those who are into extraterrestrial species.
Format: Paperback
My reading interests have always been wide and varied. I love exploring scientific topics like physics, astronomy, cosmology and space travel; however, I am also curious about many other strange and unique subjects and after seeing this book (The Extraterrestrial Species Almanac: The ultimate guide to greys, reptilians, hybrids, and Nordics (MUFON) by Craig Campobasso) on Amazon I decided to purchase it. Even though I am scientific minded I have to admit to be fascinated when I started to read this tongue and cheek treatment of supposed creatures inhabiting our universe, which must be hiding from our scientists who are working for SETI. May be they should also read this book? In any case, I do like this book because it is a joy and a fun exploration of what extraterrestrials might look like. If you are interested in the unknown mysteries of outer space and what an alien race might look like, what their philosophy might be, and whether they are friendly to we earthlings or not, this book will provide that information as long as you keep in mind that it is a “tongue in cheek” evaluation. I also found the illustrations of our space brothers and sisters kind of interesting and unique. This volume is organized into 6 parts covering human extraterrestrial races, zeta humans, (greys and more), animal and insect races, notable hybrid races, reptilians, and other extraterrestrials. Rating: 5 Stars. Joseph J. Truncale (Author: Tactical Principles of the most effective Combative Systems).
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Reviewed in the United States on February 18, 2021

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