in-akustik Audio Cables

NF-2405 AIR

Reference Air Helix interconnect. 25 mm.

The NF-2405 AIR brings fifth-generation Point-to-Point Air Helix technology into a 25 mm diameter interconnect. Its double mono construction and Cross Link Super Speed waveguides deliver the same air-insulation principles as the flagship in a more manageable format. Available in both RCA and XLR — RCA with solderless pressure-grouted connectors, XLR with 180-degree rotatable plugs and dense tin-plated copper braid shielding.

At a Glance

●25 mm cable diameter

●Point-to-Point Air Helix (5th gen)

●Cross Link Super Speed waveguides

●Double mono construction

●Available in RCA & XLR

●Handmade in Germany

Key Features

25 mm Air Helix Diameter

Generous conductor spacing within the Air Helix architecture for near-zero capacitance in a more manageable cable diameter.

Cross Link Super Speed Waveguides

Hand-threaded waveguides prevent eddy current effects at high frequencies, preserving transient detail and extension.

Double Mono / Symmetrical Design

Each channel runs independently with its own shielding, eliminating crosstalk between left and right.

360 Degree Connectors

RCA SL with rhodium-coated tellurium copper contacts pressure-grouted at 1.5 tonnes; XLR with 180-degree rotatable plugs.

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.