LS-404 Micro AIR
Quality: Referenz€780.00
Product information "LS-404 Micro AIR"
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.
Click here and discover the exciting details| Application: | High-end speaker cable |
|---|---|
| Cable diameter: | 16 mm |
| Conductor design: | Concentric copper |
| Conductor material: | High-purity OFC copper |
| Conformity: | CE, REACH, RoHS |
| Connection type: | SBW, SW |
| Connector housing: | Solid metal |
| Contact enhancement: | Rhodium-coated |
| Contact material: | Beryllium copper, Brass |
| Cross-section: | 2 x 10.48 mm² (8 x 2.62 mm²) |
| Customized assembly: | On request |
| Design: | 8-fold multicore |
| Dielectric: | Air chambers |
| Length: | 2 m, 2,5 m, 3 m, 3,5 m, 4 m, 4,5 m, 5 m |
| in-akustik product group: | Loudspeaker cables |
| in-akustik category: | Referenz speaker cables |
| Quality: | Referenz |
| Technology: | Micro AIR Multicore |
| Connector: | Banana Cable lug Easy Plug |
| Connector highlight: | Spring-loaded contact fork |
| Made in Germany: | Yes |
| Free trial listening: | Yes |
- 1 x stereo set Referenz LS-404 Micro AIR
- Quality certificate
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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4 reviews
Rico, 21 February 2026 18:43
Die Watte ist weg - unfassbar!
Ich war lange davon überzeugt, dass Lautsprecherkabel keinen großen Einfluss haben. Oh man - habe ich falsch gelegen.
Nach dem Probehören von mehreren hochwertigen Lautsprecherkabeln wurde ich eines besseren belehrt. Einige haben keinen signifikanten Unterschied gebracht. Aber dann kam das LS-404 Mirco Air an die Reihe und hat auf einmal die Watte aus meinen Lautsprechern gezogen. Unfassbar.
Auf einmal war mehr Klarheit, mehr Details, strafferer Bass...einfach viel mehr Musik hörbar. Ich konnte es nicht glauben. Von meiner Seite eine absolute Empfehlung mit extrem guten Preis-Leistungs-Verhältnis.
Jörg, 20 January 2026 15:53
Kein Voodoo oder Schlangenblut
Ich habe mir das LS-Kabel ohne Probehören gekauft, ja war eigentlich ein bisschen verrückt. Aber ich bin und war von In-Akustik Produkten absolut begeistert und wurde nie enttäuscht worden. Das LS-Kabel 404 spielt bei mit seid ca. 10 Stunden und hat mich schon komplett überzeugt, gegenüber meinen alten LS-Kabel (War kein Baumarktkabel kam auch knappe 400€) aber gar kein Vergleich, ich hatte immer Probleme mit Rauschen beim alten LS-Kabel und musste meinen Phonovorverstärker auf -6 db runter schalten um kaum noch Brummen zuhören. Das LS-Kabel 404 Brummen nee gib es nicht bei uns 😁. Klanglich wie geschrieben Welten und das nach ca. 10 Std. was kommt wie In-Akustik schreibt Einspielzeit ca. 50-60 Std? Bin bin überzeugt und gebe 5 Sterne und eine dicke Empfehlung. Als nächstes kommt mir ein in-akustik Ref Phono-1205 AIR als Update. Vielen Dank auch für den telefonischen Support sehr nette geduldige Mitarbeiter die Fragen beantworten und helfen.
Frank, 27 April 2025 08:21
Hier reichen 5 Sterne nicht aus. ******
Ich habe jetzt 1 Jahr das Lautsprecherkabel LS-404 Micro Air. Vorher hatte ich das LS-204 Micro Air und war schon damit mehr als zufrieden. Der Wechsel auf das LS-404 hat noch Verbesserungen in allen Bereichen gebracht.
Alles ist einfach noch besser obwohl man dachte das Limit ist erreicht. Ich habe seit Jahren die ganze Verkabelung von In-Akustik und auch die Power-Station. Für mich gibt es nichts besseres und ich konnte schon High End-Freaks
die immer wieder Verkabelung getauscht haben, von In-Akustik überzeugen und auch die sind mehr als begeistert. Endlich können wir über andere Themen als Verkabelung reden.
Mein Fazit: Mehr Kupfer ist besser & einmal In-Akustik immer In-Akustik und ich arbeite nicht bei dieser Firma :-).
Martin, 11 March 2025 15:26
Begeistert
Das LS-404 in der Bi-Wire-Version ist nicht mein erstes Lautsprecherkabel.
Zuletzt hatte ich ein amerikanisches Kabel für den doppelten Preis, was aber aus mehr Gummi als aus Kupfer bestand. Technisch war mir das zu fragwürdig und die Stecker waren nach ein paar Monaten leider auch locker!
Das In-Akustik kostet hingegen die Hälfte, klingt aber deswegen nicht halb so gut, sondern das genaue Gegenteil ist der Fall. Und das ist das Besondere!
Die Präzision im Bass ist und die Detailfülle sind beim ersten Anschließen zwar noch nicht vollends da. Aber nach einer Einspielzeit von bestimmt 15-20 Stunden ist der Klangunterschied verblüffend.
Das Kabel klingt von Beginn an neutral, aber niemals scharf oder technisch. Nach den ersten Tagen gewinnt der Klang an Punch und Natürlichkeit.
Insgesamt ist hier alles auf hohem Niveau. Klanglich bin ich begeistert.
Sehr gut gefällt mir auch die hohe Flexibilität und die Stecker.
Gewünscht hätte ich mir noch eine Alu-Hülse am Aderzweig. Aber optisch wirkt das Kabel mit den Luftkammern in schwarz-weiß sehr edel und hochwertig.
Die telefonische Beratung war auch sehr gut. Und ein deutsches Produkt erworben zu haben, ist wirklich klasse.
Das LS-404 in der Bi-Wire-Version ist mein letztes Lautsprecherkabel.
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.
Click here and discover the exciting detailsThe new Referenz Micro AIR series 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 new 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-204 XL Micro AIR uses a total of 6 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-204 XL has a balanced sound character with precise timing, on top of a solidly controlled foundation. This cable is primarily designed for full-size floorstanding speakers. Sound, of course, is always subjective and depends not least on the overall constellation of a hi-fi system. In the end, the decisive factor is your own personal listening impression.
Click here and discover the exciting detailsInductance is a critical behavioral feature of a cable, causing resistance to the signal flow, rising with the frequency. Multicore architectures, such as that of the LS-40, reduce this effect and bring more precision and punch to the sound.
The conductors of the LS-40 are made of high-purity copper. Under normal conditions, copper is the next-best electrical conductor after silver. Compared to cheap CCA (Copper Coated Aluminum) in particular, copper has a significantly better conductivity and is also mechanically more resilient.
The stranded wire design is a tried and tested conductor design in the hi-fi sector. Each conductor consists of 50 x 0.25 mm strands that are "twisted" together. The advantage of this design lies in the economical method of production and the mechanical flexibility, which increases with smaller diameters of the individual wires.
The conductor cross-section of 2x5.0 mm² is the foundation for a dynamic and powerful sound. The polyethylene (PE) insulation of the LS-40 has very good electrical properties. Compared to PVC, it halves the annoying battery-like capacitance of cables. The reproduction gains in brilliance and spatial quality.
The PE network jacket protects against mechanical damage and serves as additional insulation.
€780.00*
€984.00*
€269.00*
Micro AIR technology
We are not able to switch off the laws of nature, so the best we can do is use them as ingeniously as possible. Due to the laws of nature, every cable exerts so-called parasitic effects. These include capacitance – the capacity to store energy like a battery and release it again with a time delay. This effect has a considerable impact on the transmission of audio signals and is therefore unwelcome. Capacitance is a physical property, and its value depends on a number of different factors, one of the most important of which is the insulation material used, also known as the “dielectric”. The dielectric material can considerably increase the capacitance of the cable. Because air doesn’t do this, it’s ideal for insulation purposes. One of the insulation elements in the Micro AIR technology is a complex, diamond-shaped structure. The tiny chambers created by this structure increase the distance between the conductors and raise the air content of the insulation. This method reduces troublesome capacitance effects and optimizes the cable’s transmission characteristics for the sensitive audio signals it needs to transport.
Concentric copper
Unlike the sometimes chaotic arrangement of individual wires in conventional conductor designs, concentric copper conductors are arranged in a precisely defined multi-layer pattern. This design reduces irregular contact points between the wires, which harmonizes the signal flow and minimizes runtime differences. Impulses can be reproduced with pinpoint accuracy and the spatial information of the music is retained. A thin layer of polyethylene protects the high-purity copper from oxygen and thus from oxidation.
Copper is the best electrical conductor after silver under normal conditions. Compared to cheap CCA (Copper Coated Aluminum) in particular, copper has a significantly better conductivity and is also mechanically more resilient. The conductors of the Micro AIR cables are made of high-purity OFC (Oxygen Free Copper).
Electrostatics and capacitance
It’s something we’re all familiar with: when you take off a sweater with a high synthetic content you hear a crackling sound. The reason for this is that the integrated plastic material stores electrical energy, and then discharges it again. The same thing happens in the dielectric material of a cable. It “absorbs” electrical energy like a sponge and then releases it again. In the case of an audio cable, however, this electrical energy is part of the audio signal. This problematic storage capacity of a cable is referred to as its “capacitance”. While capacitors intended to store energy should have a correspondingly high capacitance, the capacitance of a cable should be as low as possible. If this is not the case, it can have a serious detrimental effect on the transmission characteristics and also lead to interactions with connected electronic devices. The ideal solution is therefore air insulation such as that implemented with the Micro AIR (and previous AIR technology), reducing the capacitance to an absolute minimum.
Cables should not make any sound
The Referenz AIR series cables have already caused something of a sensation in the world of high-end connections. And we have used the very same principles of physics to develop our Referenz Micro AIR series. As the name suggests, air as insulation also plays a key role with these high end connections due to the excellent dielectric properties.
Cables in general don’t make any sound; they have a filtering effect and interact with the devices. We believe audio connections should be as unobtrusive as possible and cause no sound coloration. These would perhaps be astonishing to hear the first time, but they actually distort the original, and eventually are annoying. The trick is to adapt the physical filter effect through the architecture and choice of materials so that losses and interactions are reduced to a minimum. This was our goal when developing the Referenz Micro Air series – and we believe we have achieved our goal once again.
Made in Germany
Just like the AIR Helix cables, the Referenz high-end cables with Micro AIR technology are also manufactured in our own factory in Germany. Along with the complex, manual assembly of the cables, this of course also includes the corresponding quality control. Every cable is put through its paces after production. Both functional tests and mechanical tests are carried out. And of course we also check the live performance as part of product development – for maximum precision and low-loss signal transmission.
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.
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The RCA and XLR outputs on hi-fi components transmit very weak signals and are therefore highly sensitive to a cable’s electrical properties—particularly its capacitance. High cable capacitance acts like a low-pass filter: it attenuates high frequencies and causes phase shifts that degrade the musical reproduction. Micro AIR technology consistently reduces capacitance, thereby preserving the integrity of the audio signal—for unadulterated reproduction across the entire frequency spectrum, from powerful bass to the finest high-frequency details. Another critical factor is signal noise within the conductor structure. Uncontrolled contact points between the individual wires can generate micro-distortions that manifest sonically as an unpleasant “hissing” sound during S-sounds, among other things. The specially developed Guided Copper construction of the NF-404 specifically addresses this problem: The individual conductors are precisely separated and insulated from one another by PE wires. This ensures a defined structure and a consistent, low-loss signal flow. The symmetrical architecture of the NF-404 Micro AIR also offers high immunity to electromagnetic interference. In environments with numerous potential sources of interference, such as switching power supplies, Wi-Fi, or cellular networks, stray signals are effectively compensated for. The result is stable, low-interference transmission. Whether used on its own or in combination with the LS-404 speaker cable, the NF-404 Micro AIR unlocks the full sound potential of your system and delivers an open, precise, and detailed sound. Click here and discover the exciting details
The RCA and XLR outputs on hi-fi components transmit very weak signals and are therefore highly sensitive to a cable’s electrical properties—particularly its capacitance. High cable capacitance acts like a low-pass filter: it attenuates high frequencies and causes phase shifts that degrade the musical reproduction. Micro AIR technology consistently reduces capacitance, thereby preserving the integrity of the audio signal—for unadulterated reproduction across the entire frequency spectrum, from powerful bass to the finest high-frequency details. Another critical factor is signal noise within the conductor structure. Uncontrolled contact points between the individual wires can generate micro-distortions that manifest sonically as an unpleasant “hissing” sound during S-sounds, among other things. The specially developed Guided Copper construction of the NF-404 specifically addresses this problem: The individual conductors are precisely separated and insulated from one another by PE wires. This ensures a defined structure and a consistent, low-loss signal flow. The symmetrical architecture of the NF-404 Micro AIR also offers high immunity to electromagnetic interference. In environments with numerous potential sources of interference, such as switching power supplies, Wi-Fi, or cellular networks, stray signals are effectively compensated for. The result is stable, low-interference transmission. Whether used on its own or in combination with the LS-404 speaker cable, the NF-404 Micro AIR unlocks the full sound potential of your system and delivers an open, precise, and detailed sound. Click here and discover the exciting details
A stable, low-noise power supply is essential for high-quality music reproduction. Even modern hi-fi components with sophisticated power supplies and built-in filter stages are not entirely immune to high-frequency interference. One cause of this is capacitive coupling effects within the devices, which partially bypass the electrical isolation of the power supplies for high-frequency interference. In conjunction with the dynamic power consumption of connected components, balancing currents arise on the interconnect cables. These interfere with the sensitive audio signal and impair the purity and precision of music reproduction. Furthermore, power cables themselves emit electromagnetic interference fields that can affect nearby signal and component lines. Since these interferences have significantly higher levels compared to the very small audio signals, they have a particularly strong influence on signal processing. The Referenz AC-404 Micro AIR addresses these challenges with a cable architecture consistently designed for signal purity. The sophisticated 6-fold multicore architecture ensures exceptionally low-impedance coupling of the connected components across a wide frequency range. This effectively reduces compensation currents and creates the conditions for clean and stable signal transmission. At the same time, the design enables a powerful power supply with a high dynamic reserve — even during dynamic musical passages and high load peaks. The Micro AIR technology with an air dielectric minimizes capacitive losses and supports fast, controlled energy transfer. The result is more precise impulse reproduction and an authentic, dynamic sound presentation. The design is complemented by dual shielding consisting of a braided and foil shield. This reduces the spread of high-frequency interference fields to nearby components and interconnect cables, thereby contributing to a quiet, clean signal environment. The AC-404 Micro AIR enables music reproduction with greater clarity, detail, and dynamics—for a sound that comes as close as possible to the original recording. Click here and discover the exciting details
A stable, low-noise power supply is essential for high-quality music reproduction. Even modern hi-fi components with sophisticated power supplies and built-in filter stages are not entirely immune to high-frequency interference. One cause of this is capacitive coupling effects within the devices, which partially bypass the electrical isolation of the power supplies for high-frequency interference. In conjunction with the dynamic power consumption of connected components, balancing currents arise on the interconnect cables. These interfere with the sensitive audio signal and impair the purity and precision of music reproduction. Furthermore, power cables themselves emit electromagnetic interference fields that can affect nearby signal and component lines. Since these interferences have significantly higher levels compared to the very small audio signals, they have a particularly strong influence on signal processing. The Referenz AC-404 Micro AIR addresses these challenges with a cable architecture consistently designed for signal purity. The sophisticated 6-fold multicore architecture ensures exceptionally low-impedance coupling of the connected components across a wide frequency range. This effectively reduces compensation currents and creates the conditions for clean and stable signal transmission. At the same time, the design enables a powerful power supply with a high dynamic reserve — even during dynamic musical passages and high load peaks. The Micro AIR technology with an air dielectric minimizes capacitive losses and supports fast, controlled energy transfer. The result is more precise impulse reproduction and an authentic, dynamic sound presentation. The design is complemented by dual shielding consisting of a braided and foil shield. This reduces the spread of high-frequency interference fields to nearby components and interconnect cables, thereby contributing to a quiet, clean signal environment. The AC-404 Micro AIR enables music reproduction with greater clarity, detail, and dynamics—for a sound that comes as close as possible to the original recording. Click here and discover the exciting details
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
