in-akustik Audio Cables
NF-4005 AIR Pure Silver
Pure silver flagship. 40 mm AIR Helix.
The NF-4005 AIR Pure Silver replaces every copper conductor with high-purity solid silver, offering 6% higher conductivity and 1.5 times faster electron drift speed. Combined with the full 40 mm Air Helix architecture and Cross Link Super Speed waveguides, this is in-akustik's ultimate interconnect — delivering maximum detail retrieval and transparency. Available in both RCA and XLR configurations.
At a Glance
●Pure silver conductors
●40 mm cable diameter
●Point-to-Point Air Helix (5th gen)
●Cross Link Super Speed waveguides
●Available in RCA & XLR
●Handmade in Germany
Key Features
Pure Silver Conductors
High-purity solid silver at 61.35 S/m conductivity — 6% superior to copper with 1.5x faster electron drift for enhanced detail across all frequencies.
40 mm Air Helix Diameter
Maximum air insulation extends from connector to connector, eliminating conventional dielectric material entirely.
Cross Link Super Speed Waveguides
Hand-threaded waveguides prevent eddy currents, working in concert with silver's fast electron drift for exceptional transient response.
360 Degree Connectors
RCA SL with rhodium-coated tellurium copper contacts pressure-grouted at 1.5 tonnes; XLR with 180-degree rotatable plugs for stress-free installation.
Technologies Inside
AIR Technology
Air is the perfect insulator.
Now in its fifth generation, AIR technology uses air as the primary dielectric instead of traditional plastics like PVC. Conductors run freely suspended through the cable via precision-engineered clips at defined intervals, reducing capacitance by approximately 83% compared to standard cables. The Point-to-Point Air Helix architecture extends this principle from connector to connector for almost loss-free signal transmission.
Cross Link Super Speed
Eliminating eddy currents at high frequencies.
Cross Link Super Speed waveguides are hand-threaded into the cable structure to prevent eddy current effects at high frequencies. This preserves the full detail and extension of the audio signal across the entire audible spectrum, ensuring transients remain sharp and high-frequency information arrives intact.
Multicore Architecture
Overlapping fields, lower inductance.
in-akustik's multicore conductor arrangements use four-fold structures where the overlapping magnetic fields of individual conductors deliberately cancel each other out. This reduces inductance and minimises the skin effect at high frequencies, delivering a more neutral, dynamic frequency response.
360 Degree Pressure-Grouted Connectors
Three-axis rotation. 1.5 tonnes of force. Zero solder.
in-akustik's 360-degree BFA banana and spade lug connectors move across three axes, making connection and disconnection effortless while preventing cable stress. Instead of soldering, which introduces additional metal alloys and weak points, each connector is pressure-grouted at 1.5 tonnes of force — creating a gas-tight, vibration-resistant bond. BFA bananas use beryllium copper with solid metal housings, while spade lugs use tellurium copper, both rhodium-coated for lasting conductivity and corrosion resistance.
AIR Helix Point-to-Point
Fifth-generation air insulation, from plug to plug.
The AIR Helix design suspends conductors in a helical arrangement through the cable using specially engineered clips at precise intervals. Air replaces traditional plastic insulation as the primary dielectric, reducing capacitance by approximately 83%. The fifth-generation Point-to-Point innovation extends this architecture from connector to connector, with specialised transitions for each plug-cable combination eliminating the last remaining sections of conventional insulation.
Gallery
A closer look at the NF-4005 AIR Pure Silver.
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For complete specifications and technical details, visit the official in-akustik website.