Product information "NF-1205 AIR | RCA"

Cable capacitance plays a decisive role, especially for audio cable connections between individual devices. As the signal sources are very weak and react sensitively to high cable capacitance, audio cables are virtually predestined for air insulation using air helix technology.

In addition to this, we have also developed a completely new and entirely solder-free RCA connector for the Referenz NF-1205 Air. It consists of several component parts that are only joined together during the course of the assembly process. As with the loudspeaker cable, the thin layer of enamel is first removed from the high-purity copper wires of the "Cross Link Super Speed" waveguide by machine. Then, the contact pin of the connector, which is made of tellurium copper, is pressure-grouted with the conductor using a force of 1.5 tonnes. The connection of the shielding is also completely new: It is now hermetically sealed with screws.

Click here and discover the exciting details

Application: High-end audio cable
Cable diameter: 13 mm
Conductor design: Cross Link Super Speed waveguide
Conductor material: High-purity OFC copper
Conformity: CE, REACH, RoHS
Connector assembly: Pressure-grouted contacts (1.5 tonnes)
Connector housing: Solid metal
Contact enhancement: Rhodium-coated
Contact material: Tellurium copper
Customized assembly: On request
Design: Coaxial
Dielectric: Air
Jacket: PE network jacket
Length: 1 m, 1.5 m, 2 m
Shielding: Dense copper braid, tin-plated (oxidation protection)
Product group: Home HiFi
Product category: Analog interconnects
Quality: Referenz
Technology: AIR Helix Point-to-Point Double mono
Connector: 2 x RCA > 2 x RCA
Connector highlight: RCA SL (solderless)
Made in Germany: Yes
Free trial listening: Yes
Audio Swiss logo on red background
Factory Tour & Listening Session

"Furthermore, the optimized power supply ensured a consistent energy flow, resulting in a more organized soundstage with added depth. The Audiovector R8 Arreté speakers emit mid and high frequencies to the rear as well. However, the already impressive spaciousness was further refined. The improvement in coherence and precision was truly striking. Where often one aspect is gained at the expense of another (tablecloth effect), here the tablecloth seemed to expand in all directions." Audio Swiss | 01-2024
Go to the test report
HIFI-IFAS logo with slogan "The Blog."
Previous model LS-1204 AIR

"I felt as though I was almost looking down the singer’s throat. What amazing detail I was able to hear, without the sound appearing too analytical. And always with that slight, comfortable touch of warmth. Wonderful! In my opinion, the in-akustik Referenz NF 1204 Air is a blockbuster cable." HiFi IFAs | 07-2020
Go to the test report
  • Stereo set NF-1205 RCA SL
  • Quality certificate
  • Warranty card
  • CD "Der Anlagenberater"
  • Universal operating instructions
  • Company profile

If you have any questions about product safety, please contact:
in-akustik GmbH & Co. KG
Untermatten 12-14
79282 Ballrechten-Dottingen
Germany
Tel.: +49 (0) 7634 5610-0
E-Mail: service@in-akustik.de

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in-akustik Reference NF-1205 AIR Cable View
in-akustik Reference NF-2405 AIR Cable
in-akustik Reference NF-4005 AIR RCA Cable
Name
NF-1205 AIR | RCA
NF-2405 AIR | RCA
NF-4005 AIR | RCA
Rating
Description

Cable capacitance plays a decisive role, especially for audio cable connections between individual devices. As the signal sources are very weak and react sensitively to high cable capacitance, audio cables are virtually predestined for air insulation using air helix technology.

In addition to this, we have also developed a completely new and entirely solder-free RCA connector for the Referenz NF-1205 Air. It consists of several component parts that are only joined together during the course of the assembly process. As with the loudspeaker cable, the thin layer of enamel is first removed from the high-purity copper wires of the "Cross Link Super Speed" waveguide by machine. Then, the contact pin of the connector, which is made of tellurium copper, is pressure-grouted with the conductor using a force of 1.5 tonnes. The connection of the shielding is also completely new: It is now hermetically sealed with screws.

Click here and discover the exciting details

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.

Click here and discover the exciting details

Good sound needs space! In developing our Air technology, we have proven that an audio cable’s insulation plays a decisive role and has a significant influence on the sound. This is due to dielectric losses and the electrostatic properties of the insulating materials, which burden the hi-fi system like heavy luggage and make it sluggish. By “omitting” this strain we then help the entire hi-fi chain to achieve top performance. We do this with special clips that guide the signal conductors through the cable in a row and freely suspended.

A cable’s geometry also influences these factors. Bigger distances mean less load. This is exactly where our NF-4005 AIR comes in: The AIR helix design and the cable’s dimensions create even more space and air between the signal conductors. The cable thus forms a wide audiophile corridor and rolls out the red carpet, so to speak, for every sound detail.

New RCA SL connectors (SolderLess): Soldering is a proven and established connection technology, but it is not without its weaknesses. These include the solder used in the signal path, which reduces the conductivity, and the generation of thermal voltages, even if it is kept to a minimum. With our recently developed SL (SolderLess) RCA connector, the connections from the signal conductor to the contact element are pressed with the highest precision and with a pressure of 1.5 tonnes. A further seemingly tiny improvement that brings great rewards in terms of audio performance.

Click here and discover the exciting details

Price

€979.00*

€1,749.00*

€3,999.00*

Application
High-end audio cable
High-end audio cable
High-end audio cable
Cable diameter
13 mm
25 mm
40 mm
Conductor design
Cross Link Super Speed waveguide
Cross Link Super Speed waveguide
Cross Link Super Speed waveguide
Conductor material
High-purity OFC copper
High-purity OFC copper
High-purity OFC copper
Conformity
CE; REACH; RoHS
CE; REACH; RoHS
CE; REACH; RoHS
Connector assembly
Pressure-grouted contacts (1.5 tonnes)
Pressure-grouted contacts (1.5 tonnes)
Pressure-grouted contacts (1.5 tonnes)
Connector housing
Solid metal
Solid metal
Solid metal
Contact enhancement
Rhodium-coated
Rhodium-coated
Rhodium-coated
Contact material
Tellurium copper
Tellurium copper
Tellurium copper
Customized assembly
On request
On request
On request
Design
Coaxial
Symmetrical
Symmetrical
Dielectric
Air
Air
Air
Jacket
PE network jacket
PE network jacket
PE network jacket
Length
1 m; 1.5 m; 2 m
1 m; 1.5 m; 2 m
1 m; 1.5 m; 2 m
Shielding
Dense copper braid, tin-plated (oxidation protection)
Dense copper braid, tin-plated (oxidation protection)
Dense copper braid, tin-plated (oxidation protection)
Product group
Home HiFi
Home HiFi
Home HiFi
Product category
Analog interconnects
Analog interconnects
Analog interconnects
Quality
Referenz
Referenz
Referenz
Technology
AIR Helix Point-to-Point; Double mono
AIR Helix Point-to-Point; Double mono
AIR Helix Point-to-Point; Double mono
Connector
2 x RCA > 2 x RCA
2 x RCA > 2 x RCA
2 x RCA > 2 x RCA
Connector highlight
RCA SL (solderless)
RCA SL (solderless)
RCA SL (solderless)
Made in Germany
Yes
Yes
Yes
Free trial listening
Yes
Yes
Yes

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in-akustik Reference NF-1205 AIR Cable View

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.

  • "I felt as though I was almost looking down the singer’s throat. What amazing detail I was able to hear, without the sound appearing too analytical. And always with that slight, comfortable touch of warmth. Wonderful! In my opinion, the in-akustik Referenz NF-1204 Air is a blockbuster cable."

    HiFi IFAs | 07-2020 (previous model)
  • "The architecture is bold and modern. No plastic has been employed as a separating element, just pure air. According to the physical ideal, it couldn't be better | Processing: outstanding"

    Audio | NF-1204 AIR (previous model)
in-akustik Reference NF-1205 AIR Cable View

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-1205 is now also pressure-grouted from signal conductor to contact elements with 1.5 tonnes.

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.

in-akustik Reference NF-1205 AIR NF Cable
in-akustik Reference NF-1205 AIR Cable View

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.

in-akustik Reference NF-1205 AIR Cable View

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.

in-akustik Reference NF-1205 AIR Cable View

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.

Employee in the assembly of in-akustik cables

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.

in-akustik Reference NF-1205 AIR cable in close-up

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.

in-akustik Reference NF-1205 AIR cable on table

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.

in-akustik Reference NF-1205 AIR Cable View

Did you know...

...that our NF-1205 AIR (2 x 1.5 m) is made up of 254 individual components? The copper wire used is 855 m long, and the PE monofilament is 334 m long. Containing 208 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.


in-akustik Reference NF-1205 AIR Cable Assembly

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.

in-akustik Reference NF-1205 AIR Connector

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.

in-akustik Reference NF-1205 AIR Connector Detail View

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.

  • in-akustik Reference NF-1205 AIR cable connected
  • in-akustik Reference NF-1205 AIR cable connections
in-akustik Reference LS-4005 AIR Cable Detail

Test listening at home now

Are you curious to know whether the AIR cables keep the finest details precisely and harmoniously on your system? Test our AIR cables or an audio component from our partner companies Primare and Audiovector in your home for 14 days with no strings attached!

Book a listening session

Or directly to the nearest dealer!

We work with a network of authorized dealers and distributors throughout the world. Arrange a listening appointment now.

Find a in-akustik partner

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