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Product information "S25 Connect 212 Audio | RCA"

The Connect 212 audio RCA provides a sonically neutral and technically clean connection for high-quality hi-fi applications. Its highly flexible construction and discreet design ensure easy integration into existing systems. The signal conductors are made of high-purity, oxygen-free copper (OFC) and insulated with foamed polyethylene – a material with an especially low dielectric constant that supports low-loss signal transmission. The symmetrical dual-mono design with separate conductors for positive and negative ensures stable and low-interference signal routing.

A dense braid of 186 fine copper strands serves as effective shielding against external interference – such as from Wi-Fi or Bluetooth devices. The gold-plated full-metal connectors provide long-term reliable contact with low transition resistance and high mechanical stability. The Connect 212 is manufactured in Germany and each unit is individually tested for signal continuity.

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Application: HiFi audio cable
Cable diameter: 8.5 mm
Color: Darkblue
Conductor design: 7 x 0.20 mm
Conductor material: High-purity OFC copper
Conformity: CE, REACH, RoHS
Connector assembly: Soldering
Connector housing: Solid metal
Contact enhancement: Gold-plated
Contact material: Brass
Cross-section: 24 AWG
Customized assembly: On request
Design: Symmetrical
Dielectric: Foamed PE
Floating shield: Yes
Indicated signal direction: Yes
Individual inspection: Continuity and short circuit testing of all conductors
Jacket: PVC
Length: 0.75 m, 1 m, 1.5 m
Shielding: Dense copper braid
Special feature: Highly flexible
in-akustik product group: Home HiFi
in-akustik category: Analog interconnects
Quality: Exzellenz
Technology: Double mono
Connector: 2 x RCA > 2 x RCA
Made in Germany: Yes
Press logo: HiFi-Test – S25 Device of the Year
Dieser Award wird jährlich vom Magazin HiFi-Test an die besten HiFi-Produkte vergeben, basierend auf umfassenden Labortests, präzisen Messwerten und intensiven Hörvergleichen. HiFi Test ehrt damit Geräte, die in Klangqualität, Verarbeitung und Preis-Leistungs-Verhältnis herausstechen. Genau wie unsere S25-Serie.

„Die Kabel (Lautsprecher-Kabel, Coax-Digital-Kabel und Stereo-Analog-Kabel) sind solide, flexibel und neutral. Sie schaffen es mühelos, feinste Details organisch in den Gesamtklang einzubinden. Nicht eben unerhebliche Details wie die vergoldeten Stecker unterstreichen den hohen Anspruch von in-akustik, selbst im bezahlbaren Bereich. Das muss man einfach loben. Die Serie S-25 richtet sich an Ein- und Aufsteiger, aber ganz ehrlich: Damit kann man auch gut in den HiFi-Ruhestand gehen [...] Diese Kabel spielen deutlich über ihre Preisklasse hinaus.“ Alexander Rose-Fehling | Chefredakteur HIFI TEST
Award ansehen
Press logo of Sempraudio
"Die Serie folgt einem klaren Prinzip: Ein Kabel soll nichts hinzufügen, aber ebenso wenig wegnehmen. Genau das gelingt der S25 Reihe in eindrucksvoller Weise. Die Signalführung bleibt jederzeit stabil, neutral und störungsfrei, ganz gleich, ob es um feinste dynamische Schattierungen, komplexe Impulsverläufe oder eine detailreiche räumliche Abbildung geht."

"Besonders bemerkenswert ist das Preis-Leistungsverhältnis. In einer Branche, in der hochwertige Verbindungstechnik häufig mit erheblichen Aufschlägen verbunden ist, positioniert sich die S25 Serie bewusst als faire, technisch begründete Alternative zwischen ambitionierter Mittelklasse und klassischem High-End."

"Im Gesamtergebnis erreicht die S25 Serie eine Wertung von 9 von 10 Punkten – ein Ausdruck dafür, wie konsequent, ausgewogen und praxisnah in-akustik dieses Projekt umgesetzt hat. Die Serie ist damit nicht nur ein hervorragender Einstieg ins audiophile Segment, sondern auch eine langlebige Basis für anspruchsvolle HiFi-Ketten, die auf technische Substanz statt kosmetischer Effekte setzen."

Kurz gesagt: Die in-akustik S25 Serie des deutschen Spezialisten in-akustik bietet alles, was hochwertige Verbindungstechnik leisten soll – und verzichtet auf alles, was sie nicht leisten muss. Michael Holzinger | sempre-audio.at | S25 Speaker 425 | S25 Connect 212 Audio & Digital
Testbericht lesen
Logo fairaudio.de "Highlight Test: 10/25 - in-akustik Speaker 425 und in-akustik Connect 212 Audio"
"Man kann der Veränderung zuhören – so, wie man einem Schmetterling, der gerade aus dem Kokon geschlüpft ist, beim Entfalten seiner Flügel zuschauen kann [...] Ich hatte bisher noch kein Kabel im Test, das nach so kurzer Zeit so "fertig" klang."

"Dynamisch lässt das In-akustik Speaker 425 nichts anbrennen, sondern zeigt sogar dem mächtigen Ortofon, dass die Toms in "Yillah" des Hadouk Trios besser balanciert und realistischer klingen, wenn der Impuls einen Hauch zackiger, knackiger und der Oberbass etwas weniger prominent transportiert werden [...] Der eigentliche Zauber dabei ist der „Kick in den Allerwertesten“, zu dem das Speaker 425 meine ATC animiert – auch schon bei recht niedrigen Pegeln. Das spricht für einen wahrlich ungehinderten Energiefluss [...] Und es lenkt die Aufmerksamkeit wiederum auf seine grandiose Impulswiedergabe, die knackiger und nuancierter rüberkommt als selbst mit deutlich teureren Kabeln."

"Das Audioquest Rocket 22 muss sich beiden Kabeln knapp geschlagen geben, da es – auf hohem Niveau – etwas glanzloser und minimal weniger offen wirkt [...] Die Kirschen auf dem Kuchen sind die holografische Genauigkeit auf der ziemlich breiten Klangbühne, die glasklare Transparenz des ehrlichen Hochtons – ohne Härten – und der Umstand, dass In-akustik Explosivität und Spielfreude in dieser Preisklasse realisieren und dann tonal ausbalanciert domestizieren konnte." Michael Bruß | fairaudio.de | S25 Speaker 425 | S25 Connect 212 Audio
Testbericht lesen
Logo Hifi-test-Magazin "Preis-Leistung-Tipp"
"Wir brauchen sie, sind aber auch ein wenig unsicher, ob die Kabel, die wir uns leisten können, gut genug sind. Keine Sorge, es gibt Firmen, die uns diese Fragen ernsthaft und sinnvoll beantworten können und dazu gehört in-akustik aus dem badischen Markgräflerland."

"Eines ist sicher: wenige Firmen in unserer Branche machen ihre Arbeit und damit das durchaus kontroverse Thema Kabel so transparent wie in-akustik.[...] Man wird sich schwer tun, für dieses Geld ein auch nur vergleichbares Kabel zu finden [...] Diese Kabel passen hervorragend zu meinen Komponenten und spielen mit ihrem natürlich-neutralen und doch straffen, aber natürlichen Klangcharakter deutlich über ihre Preisklasse hinaus." Christian Bayer | Hifi-Test 06-2025 | S25 Speaker 415 | S25 Connect 212 Audio | S25 Connect 212 Digital
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  • Stereo Set Connect 212 Audio RCA

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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Produktbild Connect 212 RCA Kabel oben offen unten mit Stecker montiert
in-akustik Reference NF-104 RCA Cable
Name
S25 Connect 212 Audio | RCA
NF-104 Micro AIR | RCA
Rating
Description

The Connect 212 audio RCA provides a sonically neutral and technically clean connection for high-quality hi-fi applications. Its highly flexible construction and discreet design ensure easy integration into existing systems. The signal conductors are made of high-purity, oxygen-free copper (OFC) and insulated with foamed polyethylene – a material with an especially low dielectric constant that supports low-loss signal transmission. The symmetrical dual-mono design with separate conductors for positive and negative ensures stable and low-interference signal routing.

A dense braid of 186 fine copper strands serves as effective shielding against external interference – such as from Wi-Fi or Bluetooth devices. The gold-plated full-metal connectors provide long-term reliable contact with low transition resistance and high mechanical stability. The Connect 212 is manufactured in Germany and each unit is individually tested for signal continuity.

Click here to discover exciting details

Compared to the NF-204 Micro AIR, the NF-104 Micro AIR has a conventional, coaxial architecture. In addition to the Micro AIR technology, another special feature of the NF-104 is the newly developed RCA connector, which is completely solder-free. Omitting the solder significantly reduces transition resistance and element formation. As the name suggests, the NF-104 harmonizes particularly well with the LS-104 speaker cable. Both cables are the perfect way of entering the world of Micro AIR technology.

Click here and discover the exciting details

Price

€149.00*

€288.00*

Application
HiFi audio cable
High-end audio cable
Cable diameter
8.5 mm
4.2 mm
Color
Darkblue
-
Conductor design
7 x 0.20 mm
Concentric copper
Conductor material
High-purity OFC copper
High-purity OFC copper
Conformity
CE; REACH; RoHS
CE; REACH; RoHS
Connector assembly
Soldering
Pressure-grouted contacts (1.5 tonnes)
Connector housing
Solid metal
Solid metal
Contact enhancement
Gold-plated
Rhodium-coated
Contact material
Brass
Tellurium copper
Cross-section
24 AWG
-
Customized assembly
On request
On request
Design
Symmetrical
Coaxial
Dielectric
Foamed PE
Air chambers
Floating shield
Yes
-
Indicated signal direction
Yes
-
Individual inspection
Continuity and short circuit testing of all conductors
-
Jacket
PVC
PE network jacket
Length
0.75 m; 1 m; 1.5 m
0.75 m; 1 m; 1.5 m
Shielding
Dense copper braid
2-fold (braid + foil)
Special feature
Highly flexible
-
in-akustik product group
Home HiFi
Home HiFi
in-akustik category
Analog interconnects
Analog interconnects
Quality
Exzellenz
Referenz
Technology
Double mono
Micro AIR; Double mono
Connector
2 x RCA > 2 x RCA
2 x RCA > 2 x RCA
Made in Germany
Yes
Yes

Sound doesn't start at the amplifier

Audio cables are far more than simple connections between source and amplifier – they play a crucial role in how much of the music actually reaches you. Every RCA cable acts electrically like a network of resistance, capacitance, and inductance. These properties influence whether details are preserved or whether highs lose brilliance and lows lose precision. Especially with audio interconnects, copper quality, insulation, and shielding are essential for low-loss, interference-free signal transmission. The S25 series uses high-purity OFC copper, foamed PE dielectric, and flexible, durable materials. This keeps the music signal clear, true to the source, and authentic – so you hear what’s really on the recording. A good cable doesn’t color the sound – it transmits it. It’s the solid bridge between your components and musical expression.

Foamed PE: High-Quality Dielectric

A key quality feature of the S25 audio cables is the foamed polyethylene (PE) used as the dielectric. Air is – right after vacuum – the best dielectric because it has an extremely low dielectric constant. Foamed PE takes advantage of this by enclosing microscopic air bubbles within the material. This significantly reduces the electrical conductivity of the insulator and minimizes the cable's capacitance. The result: signal losses are drastically reduced, and the transmission remains clear, fast, and natural. Compared to solid insulators like PVC, the foamed PE dielectric ensures especially precise and uncolored sound reproduction. This allows even the finest details, dynamics, and spatiality of your music to fully come through – creating a listening experience that comes very close to the original in the studio.

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  • "A good cable is like an interpreter between artist and listener: The more neutral and precise it works, the closer you are to the original. That’s exactly what we aimed to achieve with the S25 series."

    Product developer Holger Wachsmann

OFC Copper: Pure Material for Pure Music

For the S25 audio cables, we use only highly pure, oxygen-free copper (OFC) with a purity level of at least 99.95%. This material offers excellent conductivity and reduces contact losses – even over longer cable runs. Additionally, OFC copper is especially resistant to corrosion, ensuring sonic stability over the years. Combined with the foamed PE dielectric and dense shielding, the signal remains unaltered – from the source to the amplifier. The S25 cables deliver music with high clarity and authentic dynamics – honest, direct, and without artificial coloration.


Dense Shielding & Floating Shield

Especially for RCA audio cables, high-quality shielding is crucial to protect the sensitive signal from interference caused by Wi-Fi, Bluetooth, or power supplies. The S25 series relies on a tightly woven high-density copper braid and a so-called floating shield: the shielding is electrically separated from the signal and directs interference away without acting as a source of noise itself. This keeps the audio signal free from hum, noise, and high-frequency interference – even in demanding home environments. The result is a clean, interference-free transmission with maximum detail accuracy.

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  • Produktbild Connect 212 Audiokabel offenes Kabel Litze, Abschirmung und Aufbau ist dargestellt

    Thoughtful engineering

    The S25 series combines high-quality materials, intelligent design, and skilled craftsmanship into an audiophile cable concept that makes high-end sound accessible to newcomers.

  • Produktbild Connect 212 Audiokabel offenes Kabel Litze, Abschirmung und Aufbau ist dargestellt

    Thoughtful engineering

    The S25 series combines high-quality materials, intelligent design, and skilled craftsmanship into an audiophile cable concept that makes high-end sound accessible to newcomers.

Every cable a promise: Quality assurance in the S25 series

Before any cable from the S25 series leaves our manufacturing facility, it is individually tested for complete signal continuity. This ensures that every connection from the plug to the conductor functions flawlessly. This final inspection is part of our uncompromising commitment to quality – because even at the entry level of high-end hi-fi, every detail matters.

Manufacturing quality for entry into high-end

The S25 series was developed as an entry point into the world of high-end hi-fi – 100% made in Germany. Each cable is produced in our in-house workshop: carefully handcrafted, individually tested, and technically refined down to the last detail. We invest in high-quality materials, solid expertise, and genuine craftsmanship – not in glossy wrapping or excessive packaging. The sturdy cardboard packaging protects what matters most: your listening experience. Because sound doesn’t come from appearances, but from quality – honest, direct, and authentic.

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The S25 Connect RCA plug is suitable for custom assembly of audio, digital, and subwoofer cables. Unlike simple tin-plated RCA plugs with plastic housings, its contact material is made of solid brass with excellent conductivity. The gold-plated contacts are permanently protected against corrosion. For stability and a timeless appearance, the precisely machined sleeve is made of solid aluminum, turned, glass bead blasted, and anodized. It provides mechanical protection for the transition zone between cable and plug while also reducing interference. The connector is designed for cables with a diameter of up to 8.5 mm, giving you flexibility in the choice of cable.

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HiFi audio cable Quality: Exzellenz Foamed PE | symmetrical
Length: 0.75 m Connector: 2 x XLR (f) > 2 x XLR (m)

The Connect 212 Audio XLR offers a sonically neutral and technically high-quality connection for demanding hi-fi and studio applications. Its highly flexible design and discreet appearance allow for easy integration into any setup. The signal conductors are made of highly pure, oxygen-free copper (OFC) and insulated with foamed polyethylene - a material with a particularly low dielectric constant that promotes low-loss signal transmission. The true balanced construction with separate conductors for hot, cold, and ground ensures stable, low-noise signal routing and enables effective suppression of hum interference and external noise sources. A dense copper braid made of 186 fine wires serves as effective shielding against external influences such as Wi-Fi, Bluetooth, or power supplies. The gold-plated solid metal XLR connectors guarantee a permanently reliable contact with low contact resistance and high mechanical stability. The Connect 212 is made in Germany and individually tested for signal integrity - ensuring uncompromising quality and long-lasting listening pleasure. Click here to discover exciting details

Regular price: €209.00
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Produktbild Connect 212 Digitalkabel oben offen, Litzen, Abschirmung, Aufbau Produktbild Connect 212 Digitalkabel
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HiFi digital cable Quality: Exzellenz Foamed PE | symmetrical
Length: 0.75 m Connector: 1 x RCA > 1 x RCA

The Connect 212 Digital meets the highest standards of sonic fidelity and technical precision in digital signal transmission. With its precisely matched impedance of 75 ohms, it is perfectly suited for all common digital audio interfaces and guarantees lossless, low-jitter transmission - even with high-resolution formats. The signal conductors are made of highly pure, oxygen-free OFC copper and insulated with foamed polyethylene (PE). This dielectric, containing microscopically enclosed air bubbles, ensures particularly low capacitance, minimizes signal loss, and preserves the integrity of even the finest digital signals. A dense copper braid made of 186 fine strands effectively shields the signal from external interference such as Wi-Fi, Bluetooth, or mobile networks. The robust, highly flexible construction and discreet design allow for easy and seamless integration into any hi-fi system. Gold-plated solid metal connectors ensure consistently low contact resistance and reliable connectivity - even after many plug cycles. Each Connect 212 Digital cable is manufactured in Germany and individually tested for signal continuity to ensure uncompromising quality and long-lasting performance. Click here to discover exciting details

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in-akustik Reference NF-104 RCA Cable in-akustik Reference NF-104 RCA Micro Air NF Cable
NF-104 Micro AIR | RCA
Referenz MICRO AIR Quality: Referenz Air dielectric
Length: 0.75 m

Compared to the NF-204 Micro AIR, the NF-104 Micro AIR has a conventional, coaxial architecture. In addition to the Micro AIR technology, another special feature of the NF-104 is the newly developed RCA connector, which is completely solder-free. Omitting the solder significantly reduces transition resistance and element formation. As the name suggests, the NF-104 harmonizes particularly well with the LS-104 speaker cable. Both cables are the perfect way of entering the world of Micro AIR technology. Click here and discover the exciting details

Regular price: €288.00
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Produktbild S25 Speaker 425 Kabel Single-Bi-Wire PIN Stecker Ausführung unten sind stecker montiert, oben sind die Litzen offen Produktbild S25 Speaker 425 Single-Bi-Wire PIN Ausführung
S25 Speaker 425
HiFi speaker cable Quality: Exzellenz PE | Multicore | 5 mm²
Connection type: SBW Length: 2 m Connector: Easy Plug

The S25 Speaker 425 is the most powerful model in the series, designed for audiophile setups with high power reserves and long cable runs. The large conductor cross-section and low-inductance multicore design ensure exceptionally low-loss transmission – even under high load or long cable lengths. The sound benefits from a particularly controlled, deep-reaching bass with precise punch, clearly defined mids, and an open, detailed high-frequency reproduction. The spatial presentation is stable and wide. Thanks to high-quality materials such as fine-stranded OFC copper, solid crimp contacts, and gold-plated connectors, the signal remains unaltered along the entire length. Its discreet, functionally elegant design and surprisingly high flexibility despite the large cross-section allow for neat, unobtrusive installation – even in complex rack setups or close to walls. Click here to discover exciting details

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Regular price: €360.00