Product information "LS-1205 AIR"

Because the speaker cable carries the largest current in the entire device chain, a suitable conductor cross-section is required to transport it with as little loss as possible. This current generates correspondingly strong magnetic fields and, since it is alternating current, there is a frequency-dependent resistance in the inductance of the cable.

Low inductance is therefore particularly important for speaker cables - and this is precisely what has been achieved with the LS-1205 Air: The cable's inductance value has been reduced by a particularly ingenious arrangement of the conductors, the 4-fold "multicore" structure, enabling it to behave in a completely sound-neutral way over a wide frequency range. In addition, the magnetic fields generated around the individual conductors overlap and neutralize each other. This means that all frequencies are transported unhindered and without any time delay, enabling a fabulously open and detailed musical presentation. At the end of the air helix, the LS-1205 Air’s four conductors are separated into so-called aluminum splitters for the receiving connector.

In the area between the splitters and plug, in-akustik uses highly flexible molded parts made of a special elastomer. These parts are fixed inside the splitter using a specifically designed plastic plug. This means that the cable remains reliably flexible in the connection area as well. The molded parts run right to the front of the connectors and enclose their inner workings - which underscores the sleek yet attractive design of the LS-1205 Air.

Click here and discover the exciting details

Application: High-end speaker cable
Cable diameter: 13 mm
Conductor cross-section: 2 x 2.4 mm² (4 x 1.2 mm²)
Conductor design: Cross Link Super Speed waveguide
Conductor material: High-purity OFC copper
Conformity: CE, REACH, RoHS
Connection type: SW
Connector assembly: Pressure-grouted contacts (1.5 tonnes)
Connector housing: Full metal (cable lug), Plastic (BFA)
Contact enhancement: Rhodium-coated
Contact material: Beryllium Copper (BFA Banana), Tellurium copper (cable lug)
Customized assembly: On request
Design: 4-fold multicore
Dielectric: Air
Jacket: PE network jacket
Length: 2 m, 2,5 m, 3 m, 3,5 m, 4 m, 4,5 m, 5 m
Product group: Loudspeaker cables
Product category: Referenz speaker cables
Quality: Referenz
Technology: AIR Helix Point-to-Point Multicore
Connector: Banana Cable lug
Made in Germany: Yes
Free trial listening: Yes
Previous model LS-1204 AIR

Our LS-1204 AIR speaker cable has taken top place in the AUDIO Readers' Choice 2019! First of all, a big thank you to everyone who voted for the LS-1204 AIR. Your support makes this award possible and shows us that we are on the right track with our products. We hope that you continue to enjoy our products and look forward to many more musical moments with you. Many thanks to everyone, and congratulations to the whole team! Audio Readers' Choice | 2019
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
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  • Stereo set LS-1205 AIR speaker cable
  • Quality certificate
  • Warranty card
  • CD "Der Anlagenberater"
  • Universal operating instructions
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Image
Name
LS-1205 AIR
LS-2405 AIR
LS-404 Micro AIR
Rating
Description

Because the speaker cable carries the largest current in the entire device chain, a suitable conductor cross-section is required to transport it with as little loss as possible. This current generates correspondingly strong magnetic fields and, since it is alternating current, there is a frequency-dependent resistance in the inductance of the cable.

Low inductance is therefore particularly important for speaker cables - and this is precisely what has been achieved with the LS-1205 Air: The cable's inductance value has been reduced by a particularly ingenious arrangement of the conductors, the 4-fold "multicore" structure, enabling it to behave in a completely sound-neutral way over a wide frequency range. In addition, the magnetic fields generated around the individual conductors overlap and neutralize each other. This means that all frequencies are transported unhindered and without any time delay, enabling a fabulously open and detailed musical presentation. At the end of the air helix, the LS-1205 Air’s four conductors are separated into so-called aluminum splitters for the receiving connector.

In the area between the splitters and plug, in-akustik uses highly flexible molded parts made of a special elastomer. These parts are fixed inside the splitter using a specifically designed plastic plug. This means that the cable remains reliably flexible in the connection area as well. The molded parts run right to the front of the connectors and enclose their inner workings - which underscores the sleek yet attractive design of the LS-1205 Air.

Click here and discover the exciting details

The LS-2405 AIR high-end speaker cable offers audiophile enthusiasts a unique sound experience. In the new Referenz LS-2405 AIR loudspeaker cable, we have taken the outstanding properties of its predecessor, the LS-2404 AIR, and developed them even further. The point-to-point Air Helix design now enables the AIR Helix architecture to be used from plug to plug and not just between the sleeves. The 360° BFA bananas and spade lugs are a further innovation, developed in-house for easy and convenient connection to the terminals. These and other technical refinements turn the already exceptional AIR cables into true masterpieces.

Below you can learn more about the outstanding technical features of this cable, the innovations in the 5th generation and the physical principles used in the AIR technology

Click here and discover the exciting details

The LS-404 Micro AIR is a further installment in the success story of the Micro AIR technology: As with the already legendary AIR Helix cables, air is also a central component of the insulation concept in the Referenz Micro AIR technology. Due to the low speaker impedances, however, low line resistances and a low inductance are also very important for speaker cables. For this reason, the Referenz LS-404 Micro AIR uses a total of 8 concentric copper conductors in addition to the air dielectric. Thanks to this multicore architecture, the magnetic fields of the positive and negative conductors overlap and neutralize each other. This significantly reduces the inductance of the cable, which guarantees unaltered transmission of the audio signal over a broad frequency spectrum. Due to our approach, the LS-404 has an extremely balanced sound character with precise timing, on top of a solidly controlled foundation. This cable is primarily designed for full-size floorstanding loudspeakers. The impression sound makes on the listener is always subjective, of course, and depends in no small part on the overall constellation of a hi-fi system. In the end, the decisive factor is your own personal listening impression.

Price

€1,678.00*

€3,399.00*

€651.00*

Application
High-end speaker cable
High-end speaker cable
High-end speaker cable
Cable diameter
13 mm
24 mm
16 mm
Conductor cross-section
2 x 2.4 mm² (4 x 1.2 mm²)
2 x 4.8 mm² (8 x 1.2 mm²)
2 x 10.48 mm² (8 x 2.62 mm²)
Conductor design
Cross Link Super Speed waveguide
Cross Link Super Speed waveguide
Concentric copper
Conductor material
High-purity OFC copper
High-purity OFC copper
High-purity OFC copper
Conformity
CE; REACH; RoHS
CE; REACH; RoHS
CE; REACH; RoHS
Connection type
SW
SBW; SW
SBW; SW
Connector assembly
Pressure-grouted contacts (1.5 tonnes)
Pressure-grouted contacts (1.5 tonnes)
-
Connector housing
Full metal (cable lug); Plastic (BFA)
Solid metal
Solid metal
Contact enhancement
Rhodium-coated
Rhodium-coated
Rhodium-coated
Contact material
Beryllium Copper (BFA Banana); Tellurium copper (cable lug)
Beryllium Copper (BFA Banana); Tellurium copper (cable lug)
Beryllium copper; Brass
Customized assembly
On request
On request
On request
Design
4-fold multicore
8-fold double layer multicore
8-fold multicore
Dielectric
Air
Air
Air chambers
Jacket
PE network jacket
PE network jacket
-
Length
2 m; 2,5 m; 3 m; 3,5 m; 4 m; 4,5 m; 5 m
2 m; 2,5 m; 3 m; 3,5 m; 4 m; 4,5 m; 5 m
2 m; 2,5 m; 3 m; 3,5 m; 4 m; 4,5 m; 5 m
Product group
Loudspeaker cables
Loudspeaker cables
Loudspeaker cables
Product category
Referenz speaker cables
Referenz speaker cables
Referenz speaker cables
Quality
Referenz
Referenz
Referenz
Technology
AIR Helix Point-to-Point; Multicore
AIR Helix Point-to-Point; Multicore
Micro AIR; Multicore
Connector
Banana; Cable lug
Banana; Cable lug
Banana; Cable lug; Easy Plug
Made in Germany
Yes
Yes
Yes
Free trial listening
Yes
Yes
Yes
Connector highlight
-
BFA Banana 360°; Spring-loaded contact fork; Spade lug 360°
Spring-loaded contact fork

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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.

  • "These speaker cables belong behind bars. I`ve never heard a stage set-up for classical pieces like this before. Some of the instruments sounded so delicate at times that you could be forgiven for thinking a tube system was playing. You have to have these cables."

    Test listener Claus-Peter R. | LS-1204 AIR (previous model)
  • "A stroke of genius that shows competitors how it should be done in terms of sound too. This was wonderfully dynamic, with the most fabulous drive reaching the speaker cones. Admittedly, the price is not low, but the acoustic yield is truly world class. Whats`s more, everything was made by hand. You can feel the love for the product."

    Audio | LS-1204 AIR (previous model)
  • "For particularly discerning music lovers, only the best is good enough. This is why the elaborately handcrafted cable with air insulation is a real insider tip. A sound recommendation for audiophile gourmets"

    HiFi-Test | LS-1204 AIR (previous model)

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.

Pressure-grouted contacts


The connectors are pressed directly into the conductor material of the cable using a special tool with a force of 1.5 tonnes. Contact resistance and other negative solder effects are avoided.

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 multicore structure

Inductivity is a critical parameter in loudspeaker cables. By cleverly arranging the conductors in the multiply nested multicore structures, overlapping magnetic field areas are created that significantly reduce inductance. This allows the entire frequency spectrum, including high frequencies and dynamic impulse sequences, to be transported in an unimpeded way and with no delays. The music seems more exquisitely detailed, and the sound gains in fine dynamism. All details are kept distinct yet harmonious at the same time.

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 LS-1205 AIR (2 x 3 m; SW) is made up of 534 individual components? The copper wire used is 647 m long, and the PE monofilament is 667 m long. Containing 1584 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.


AIR background

It is widely known that the “dielectric” (= non-conductive substance) of capacitors plays a major role in the sound of hi-fi devices and loudspeakers. The engineers therefore select all components very carefully. Even if they only contain a few cubic millimeters of dielectric: A meter-long cable usually already contains several hundred cubic centimeters of dielectric substance in the form of insulating material. This dielectric stores electrical charge, i.e. energy – which is entirely wanted and necessary in electronic components such as capacitors. With cables, however, the resulting capacitance is considered a "parasitic" effect and is not wanted for unadulterated music playback because it significantly influences the transmission properties and leads to interactions with the connected electronics.

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.

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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