in-akustik silver cables represent the top tier of the Reference AIR range: pure silver conductors combined with patented AIR-Helix geometry for near-lossless signal transmission. Silver conducts approximately 6% better than copper, with measurably lower resistive losses. The range includes the LS-1205, LS-2405, and LS-4005 AIR Pure Silver speaker cables, as well as the LS-8005 AIR Pure Silver, all manufactured in Ballrechten-Dottingen, Germany.
LS-1205 AIR Pure Silver | BiWire Jumper
To achieve the best possible sound, it is crucial that the amplifier has a firm grip on the speakers. In addition to activating the membranes to make them vibrate, it must also be able to dampen them effectively. One measure of this is the amplifier’s damping factor. The speakers’ actual damping factor is significantly influenced by the quality of the speaker cables and connecting bridges of the bi-wiring terminals. The original bridges often consist of simple stamped sheet metal parts of inferior quality. The new in-akustik AIR High End Bi-Wire Jumpers are based on the technologies, findings and materials of the renowned LS-1205 AIR, LS-2405 AIR and LS-4005 AIR speaker cables. If bi-wiring is not an option, these high-end bi-wire jumpers offer an excellent alternative to the often inferior metal bridges on the speaker terminals. They ensure an even and controlled signal distribution, which is perfectly harmonized with the respective speaker cable. To get closer to the pinnacle of audiophile perfection, we also carefully examined the conductor material. Copper in the right purity is itself already an excellent conductor, but a superconductor with no ohmic resistance to the current would be simply perfect. The material’s superconducting properties, however, require extremely low temperatures of at least -70 degrees. Under realistic conditions, silver is currently the most conductive material. With a conductivity of 61.35 S/m (siemens per meter), it outperforms copper by around six percent. Many manufacturers only use silver-plated conductors, which over time can seem, “bright”, “metallic” and even, “annoying”. We, on the other hand, use pure silver, which has a far more neutral sound. Due to the higher drift speed of the electrons, our pure silver cable delivers a more penetrating and sumptuous sound performance across all frequency ranges. On the other hand of course, silver is about one hundred times more expensive than copper.
LS-2405 AIR Pure Silver | BiWire Jumper
To achieve the best possible sound, it is crucial that the amplifier has a firm grip on the speakers. In addition to activating the membranes to make them vibrate, it must also be able to dampen them effectively. One measure of this is the amplifier’s damping factor. The speakers’ actual damping factor is significantly influenced by the quality of the speaker cables and connecting bridges of the bi-wiring terminals. The original bridges often consist of simple stamped sheet metal parts of inferior quality. The new in-akustik AIR High End Bi-Wire Jumpers are based on the technologies, findings and materials of the renowned LS-1205 AIR, LS-2405 AIR and LS-4005 AIR speaker cables. If bi-wiring is not an option, these high-end bi-wire jumpers offer an excellent alternative to the often inferior metal bridges on the speaker terminals. They ensure an even and controlled signal distribution, which is perfectly harmonized with the respective speaker cable. To get closer to the pinnacle of audiophile perfection, we also carefully examined the conductor material. Copper in the right purity is itself already an excellent conductor, but a superconductor with no ohmic resistance to the current would be simply perfect. The material’s superconducting properties, however, require extremely low temperatures of at least -70 degrees. Under realistic conditions, silver is currently the most conductive material. With a conductivity of 61.35 S/m (siemens per meter), it outperforms copper by around six percent. Many manufacturers only use silver-plated conductors, which over time can seem, “bright”, “metallic” and even, “annoying”. We, on the other hand, use pure silver, which has a far more neutral sound. Due to the higher drift speed of the electrons, our pure silver cable delivers a more penetrating and sumptuous sound performance across all frequency ranges. On the other hand of course, silver is about one hundred times more expensive than copper. BFA & Spade 360° (LS-4005 AIR & LS-2405 AIR): Movement across three axes make the 360-degree BFA and spade connectors really easy to connect and disconnect. Difficult set-up operations that put a strain on both cables and devices are a thing of the past. The connectors can easily be attached to terminals from a wide range of manufacturers. No awkward bending is necessary, avoiding damage to surfaces and potential contact resistance. Set-up is fast and problem-free. The attractively designed connectors are the perfect complement to the outstanding sound. The new connectors are used with the LS-4005 and the LS-2405. Both connector versions as well as the Basic version for the LS-1205 are pressure-grouted with a force of 1.5 tonnes.
LS-4005 AIR Pure Silver | BiWire Jumper
To achieve the best possible sound, it is crucial that the amplifier has a firm grip on the speakers. In addition to activating the membranes to make them vibrate, it must also be able to dampen them effectively. One measure of this is the amplifier’s damping factor. The speakers’ actual damping factor is significantly influenced by the quality of the speaker cables and connecting bridges of the bi-wiring terminals. The original bridges often consist of simple stamped sheet metal parts of inferior quality. The new in-akustik AIR High End Bi-Wire Jumpers are based on the technologies, findings and materials of the renowned LS-1205 AIR, LS-2405 AIR and LS-4005 AIR speaker cables. If bi-wiring is not an option, these high-end bi-wire jumpers offer an excellent alternative to the often inferior metal bridges on the speaker terminals. They ensure an even and controlled signal distribution, which is perfectly harmonized with the respective speaker cable. To get closer to the pinnacle of audiophile perfection, we also carefully examined the conductor material. Copper in the right purity is itself already an excellent conductor, but a superconductor with no ohmic resistance to the current would be simply perfect. The material’s superconducting properties, however, require extremely low temperatures of at least -70 degrees. Under realistic conditions, silver is currently the most conductive material. With a conductivity of 61.35 S/m (siemens per meter), it outperforms copper by around six percent. Many manufacturers only use silver-plated conductors, which over time can seem, “bright”, “metallic” and even, “annoying”. We, on the other hand, use pure silver, which has a far more neutral sound. Due to the higher drift speed of the electrons, our pure silver cable delivers a more penetrating and sumptuous sound performance across all frequency ranges. On the other hand of course, silver is about one hundred times more expensive than copper. BFA & Spade 360° (LS-4005 AIR & LS-2405 AIR): Movement across three axes make the 360-degree BFA and spade connectors really easy to connect and disconnect. Difficult set-up operations that put a strain on both cables and devices are a thing of the past. The connectors can easily be attached to terminals from a wide range of manufacturers. No awkward bending is necessary, avoiding damage to surfaces and potential contact resistance. Set-up is fast and problem-free. The attractively designed connectors are the perfect complement to the outstanding sound. The new connectors are used with the LS-4005 and the LS-2405. Both connector versions as well as the Basic version for the LS-1205 are pressure-grouted with a force of 1.5 tonnes.
Reference AIR Pure Silver Cables - Ultimate High-End Audio Performance
Experience audiophile perfection with in-akustik's Reference AIR Pure Silver cable collection. Combining revolutionary AIR Helix technology with pure silver conductors, these handcrafted German cables represent the pinnacle of high-end audio engineering.
Pure Silver Conductors for Superior Signal Transmission
Pure silver offers the highest conductivity of any realistic conductor material. With a conductivity of 61.35 S/m (Siemens per meter), silver outperforms copper by approximately 6%, allowing electrons to travel 1.5 times faster. Unlike silver-plated alternatives that can sound bright or metallic, our pure silver conductors deliver neutral, detailed sound reproduction across all frequencies with exceptional speed and resolution.
Revolutionary AIR Helix Technology
The groundbreaking AIR technology minimizes dielectric losses through air insulation. Special precision clips suspend signal conductors freely in air, virtually eliminating the sluggish effects of traditional insulation materials. This innovation creates near-perfect signal transmission that's both audibly and measurably superior, approaching the physical limits of cable performance.
Investment-Grade Quality: What Sets Reference AIR Pure Silver Apart
At this premium level, you're investing in measurable performance advantages that unlock the full potential of your high-end audio system:
Unlocking Hidden Detail
Your amplifier and speakers likely have capabilities you've never heard. Reference AIR Pure Silver cables remove the final bottleneck, revealing micro-dynamics, spatial cues, and textural nuances that lesser cables mask. Experience the difference between hearing music and truly experiencing it.
Future-Proof Performance
While pure silver costs approximately 100 times more than copper, it delivers scientifically superior conductivity that doesn't degrade. These cables will remain at reference-level performance for decades, protecting your investment in flagship
Tangible Sonic Benefits
- Speed & Transient Response: Faster electron drift velocity means your system responds instantly to dynamic shifts, from delicate piano keystrokes to powerful orchestral crescendos
- Extended Frequency Extension: Pure silver's superior conductivity ensures pristine high-frequency reproduction without the artificial brightness of silver-plated alternatives.
- Reduced System Strain: Near-zero dielectric losses mean your amplifier maintains better control over speaker drivers, improving damping factor and bass articulation..
- Lower Noise Floor: Dense shielding and air insulation eliminate electromagnetic interference, revealing more music against a silent background.
The Audiophile Difference
At this performance tier, improvements aren't subtle—they're transformative. Soundstages expand beyond speaker boundaries, individual instruments occupy precise acoustic spaces, and the emotional connection to music intensifies. Professional reviewers and discerning audiophiles consistently report these cables as system revelations, not incremental upgrades.
Hand-Selected Materials
Every conductor is crafted from the highest purity silver, sourced specifically for audio applications. The material science behind these cables ensures consistent performance that mass-produced alternatives simply cannot match.
Complete Reference Pure Silver Collection
- Speaker Cables: LS-1205, LS-2405, LS-4005, and LS-8005 AIR Pure Silver cables with optimized conductor arrangements and pressure-grouted connections (1.5 tonnes force)
- Interconnect Cables: NF-1205, NF-2405, and NF-4005 AIR Pure Silver featuring AIR helix design with SolderLess (SL) RCA connectors and innovative 180° rotating XLR plugs
- Phono Cables: Phono-1205 and Phono-2405 AIR Pure Silver designed for ultra-sensitive MM/MC cartridge signals with extremely low capacitance
- Digital Cables: Digital-2405 AIR Pure Silver and USB-2405 AIR Pure Silver for jitter-free digital transmission with dense shielding
- Bi-Wire Jumpers: High-End AIR Pure Silver jumpers replacing inferior factory bridges for optimized signal distribution
German Craftsmanship & Innovation
Every Reference AIR Pure Silver cable is meticulously handcrafted in Germany with over 46 years of audio engineering expertise. Features include:
- Point-to-point Air Helix construction assembled by hand
- 360° BFA and spade connectors for effortless installation (select models)
- Optional grounding for EMI protection in modern digital environments
- Rhodium-plated connectors for optimal conductivity
- Individual cable testing and quality certification
- Precision pressure-grouting at 1.5 tonnes force
- Cross Link Super Speed Waveguide, threaded by hand with meticulous attention to detail
Each cable undergoes rigorous functionality testing before leaving our German facility, ensuring you receive a product that meets the highest standards of audio excellence.
Professional Recognition
Editors consistently praise our AIR cables: "The best cable ever connected here between amp and speakers!" (AUDIO Magazine). The copper predecessor earned acclaim as "A stroke of genius that shows competitors how it should be done – world class acoustic yield."
The Reference AIR Pure Silver Advantage
For serious audiophiles and music enthusiasts who have invested in top-tier components, Reference AIR Pure Silver cables represent the logical final step. They don't just connect components - they complete your system's signal path with laboratory-grade precision. When you've spent years curating the perfect setup, these cables ensure you're hearing everything your equipment can deliver.
Perfect for: Owners of high-end amplifiers, premium speakers, reference DACs, and audiophile turntables who demand uncompromising performance. Ideal for dedicated listening rooms, professional mastering studios, and discerning collectors who appreciate the intersection of engineering excellence and sonic artistry.
The in-akustik Commitment: With over 50 years of innovation in audio cable technology, we understand that at this level of investment, you expect not just superior sound, but lasting value, exceptional build quality, and the confidence that comes from owning reference-grade equipment.
Transform your high-end audio system with Reference AIR Pure Silver cables – where physics meets artistry for uncompromising sound quality.FAQs about Pure Silver Cables
The good old record sounds more vibrant than ever. The demand is astonishing, even for experts. The figures for records sold are increasing just as surprisingly as the number of record players. It’s a real boom. But how to improve the sound? One way is to use a new, better cable between the tonearm and the phono amplifier. The Phono-2405 AIR is a cable created to deliver top sound. What sets it apart is an absolutely unique air insulation, called the Air Helix. We have developed a special clip for this technology. It separates the two cable bundles, keeps them apart, and virtually embeds them in air. Using a large number of these clips, it is possible to route earth and signal extremely stably over longer distances. Why the effort? With this approach it is possible to pass on the sensitive signals without slowing them down - the result is fast and high-resolution sound. The Super Speed waveguides are threaded by hand and the clips are fitted with great care in the company's own factory. After this, the resulting Air Helix is also shielded and fitted with the PE network jacket by hand. Finally, the rhodium-plated connectors are fitted and cable functionality is tested. Because it's all about the most important, smallest signals: There is nowhere in the audio world where smaller currents flow that need to be passed on perfectly. The signal level of an MM or MC system is extremely sensitive, at just a few thousandths of a volt. In addition to this, the systems have an inductive character. In combination with the cable capacitance, they form what is known as an oscillating circuit, which favors specific frequencies. If these frequencies are unfavorable due to excessively high capacitance, this has a major effect on the harmony of the sound. Extremely low capacitance and dielectric losses are just two advantages of the Referenz Phono -2405 AIR. They form the basis for unadulterated enjoyment of your vinyl jewels. The sound of good records can hardly be resolved in a finer way than this. Click here and discover the exciting details
With the Digital-2405 AIR Pure Silver, the digital member of the AIR family is now also available as a pure silver cable. The dimensions, structure and arrangement of the conductors correspond to the respective copper versions. As with the LS-4005 AIR Pure Silver, LS-2405 AIR Pure Silver and LS-1205 Pure Silver, the signal conductors have been optimized. AIR technology is a milestone in our more than 40-year company history and is causing a sensation in the hi-fi industry worldwide. The approach itself sounds relatively banal: The physically induced losses must be minimized in order to transmit the original music signal as authentically and neutrally as possible. And, thanks to the AIR technology, loss-free transmission is closer than ever before. It leads to significantly better sound reproduction, which is not only subjectively audible but also objectively measurable. The insulation (or dielectric) of the AIR cables is practically perfect thanks to the air insulation, and hardly affects the sound at all. The structure, dimensions and arrangement of the conductors are optimized, and approach the limits of what is physically possible. Adding another highlight to this perfect audiophile foundation, we then focused on the conductor material of the cables. Copper in the appropriate purity is already a very good conductor. A superconductor, where electrical resistance is zero, would be perfect, of course. Unfortunately, superconducting materials require temperatures of at least -70 degrees. Under realistic operating conditions, the best conducting material we have is currently silver. At 61.35 S/m (Siemens pro Meter), its conductivity is approximately six percent superior to that of copper. However, this precious metal is about 100 times more expensive. Click here and discover the exciting details
The Air Helix construction of the Referenz USB-2405 AIR is truly unique. To achieve an almost perfect air isolation, we developed a special clip system. Inside the cable, a large number of these clips form a supporting structure that keeps the signal conductors suspended freely in air in a helical arrangement and guides them through the high-density shielding at a precisely defined distance. The flexibility of this construction is achieved through two support rails that not only hold the clips together but also maintain the exact spacing between them. Strictly speaking, the term “digital” only exists in mathematics in the form of the binary number system. In the technical world, there are no purely digital signals. To detect zeros and ones, defined voltage thresholds and timing windows are used. The transition from a zero to a one, or vice versa, always requires a certain amount of time during which the signal level passes through all intermediate values, for example from 0 volts to 5 volts. Capacitive loads, dielectric losses, noise, and electromagnetic interference caused by cables can further influence this transition. This results in timing deviations known as the jitter effect, making precise reconstruction of the audio signal more difficult or even nearly impossible. To get closer to the pinnacle of audiophile perfection, we also carefully examined the conductor material. Copper with the right purity is already an excellent conductor, but a superconductor with no ohmic resistance would be the ideal solution. However, superconducting properties require extremely low temperatures of at least -70°C. Under realistic conditions, silver is currently the most conductive material available. With a conductivity of 61.35 S/m (siemens per meter), it outperforms copper by around six percent. Many manufacturers use silver-plated conductors, which over time can result in a sound character often described as "bright," "metallic," or even "harsh." We use pure silver conductors instead, which provide a much more neutral sonic character. Due to the higher electron mobility, our pure silver cable delivers a more detailed and powerful sound performance across the entire frequency range. Silver, of course, is also around one hundred times more expensive than copper. USB connectors are known to only fit in one direction. This can be inconvenient, as the position of USB ports varies between devices. To adjust the cable routing, the cable often needs to be twisted significantly, placing stress on the cable, connectors, and sockets while also affecting the overall appearance of the installation. Our newly developed USB connectors with a 180° rotation mechanism provide the solution. Each connector can be rotated by ±45°, meaning that a total rotation of ±90° from one connector to the other is possible. This is the final refinement for a perfectly installed cable connection. The dense shielding of the Referenz USB-2405 AIR protects the sensitive signal from electromagnetic interference. Beneath the shielding is the innovative Air Helix construction, where air and the precisely defined spacing between the conductors act as the dielectric, preventing dielectric losses and significantly reducing capacitive loading. Together, these design elements make it easier for the digital-to-analog converter (DAC) to process the signal and help optimize the reconstruction of the audio signal.
Experts have already been impressed by the LS-1204 AIR (copper). This is how AUDIO summed it up: "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. What's more, everything was made by hand. You can feel the love for the product." With the LS-1205 AIR Pure Silver, the currently most filigree model in AIR technology is now also available as a pure silver cable. The structure, dimensions and conductor arrangement of this cable correspond to the copper version of the LS-1205 AIR. As with the LS-4005 AIR Pure Silver and LS-2405 AIR Pure Silver, the conductors have been optimized. Pure silver is used as the conductor material for the LS-1205 AIR Pure Silver too. Under realistic conditions, silver is currently the most conductive material. At 61.35 S/m (Siemens pro Meter), its conductivity is approximately six percent superior to that of copper. The electrons move 1.5 times faster than in a copper conductor! Click here and discover the exciting details
