On the path to authentic musical reproduction, every component of an audio system plays a critical role. With over forty years of R&D expertise, German premium cable manufacturer inakustik leverages its industry-unique air insulation technology to deliver two standout models in the Reference Micro AIR series: the AC-404 Micro AIR power cord and the NF-404 Micro AIR interconnect. Together, they forge an uncompromisingly pure pathway for your system—from AC power delivery to signal transmission.

AC-404 Micro AIR Power Cord – Infusing Your System with Pure Energy
Power is the lifeblood of any audio system. Yet even high-end Hi-Fi components with sophisticated internal power supplies and filtering circuits cannot fully isolate high-frequency interference. The electromagnetic interference fields generated by power cables themselves, along with compensating currents between components, can severely contaminate delicate audio signals. The AC-404 Micro AIR is engineered specifically to overcome these challenges.

The AC-404 Micro AIR employs a 6-fold Multicore architecture, comprising six 0.75 mm² high-purity OFC copper conductors plus a 1.5 mm² ground conductor. This design achieves extremely low-impedance coupling across a wide frequency range, effectively reducing compensating currents and creating clean, stable signal transmission conditions for your system.

Even more crucial is the Micro AIR dielectric insulation technology, which creates countless microscopic air chambers within the insulation layer to serve as the dielectric. With a dielectric constant of 1, air introduces virtually no capacitive reactance, minimizing energy storage within the insulation. This translates to faster, more controlled energy transfer and more accurate reproduction of musical transients. The dual shielding (braided mesh + aluminum foil) effectively suppresses the spread of high-frequency interference fields, protecting nearby interconnect cables and components from contamination.

Sound Performance – Clearer, More Detailed, and Dynamically Transformed
The AC-404 Micro AIR does not simply “change” the sound—it delivers a comprehensive upgrade. According to inakustik, it achieves “clearer, more refined, and more dynamic music reproduction, bringing sound infinitely closer to the original recording.” The high-purity OFC copper conductors and gold-plated brass contacts ensure low-loss power transmission, while German handcraftsmanship and rigorous quality control—including functional, high-voltage, and insulation testing—guarantee consistent performance in every cable. For listeners who demand wide dynamics and high resolution, the AC-404 Micro AIR empowers amplifiers to remain composed even during instantaneous high-current demands, unleashing unprecedented control and energy.

NF-404 Micro AIR Interconnect – Unlocking Every Musical Detail
If the power cord is the system’s “heart,” the interconnect is its “nervous system,” carrying the most fragile and precious musical signals. RCA and XLR outputs transmit extremely weak signals that are highly sensitive to cable electrical properties—particularly capacitance. The NF-404 Micro AIR is built to safeguard these delicate signals.

The NF-404 Micro AIR likewise features Micro AIR dielectric insulation, using air chambers to dramatically reduce parasitic capacitance. High capacitance acts as a low-pass filter, attenuating high frequencies and causing phase shifts that degrade soundstage and imaging. Micro AIR technology decisively eliminates this issue.

Another key innovation is the Guided Copper conductor structure. In conventional cables, irregular contact points between conductors introduce micro-distortions, manifesting as high-frequency “hiss.” Guided Copper uses PE strands to precisely separate each OFC copper conductor, ensuring a clearly defined, uniform, and low-loss signal path.

The NF-404 Micro AIR adopts a symmetrical architecture with dual shielding (braided mesh + aluminum foil), providing exceptional immunity to electromagnetic interference (EMI) and wireless signals such as Wi-Fi and cellular. The connectors are equally uncompromising, featuring tellurium copper contacts with rhodium plating—combining excellent conductivity with superior wear resistance and oxidation protection. The all-metal housing and 1.5-ton crimping process ensure outstanding mechanical stability and electrical performance.

Sound – Open, Precise, and Overflowing with Detail
The NF-404 Micro AIR’s sonic character can be summed up as open, precise, and richly detailed. From powerful bass to the most delicate high-frequency nuances, the entire frequency spectrum is faithfully reproduced. Instrumental and vocal images are more focused, spatial localization is more defined, and even the subtlest recording information emerges with breathtaking clarity.

AC-404 + NF-404 – The Perfect Synergy
While using either the AC-404 Micro AIR or the NF-404 Micro AIR alone delivers a significant upgrade, combining the two unlocks an even higher realm of performance.

The power cord ensures a clean, ample, and stable power supply, while the interconnect transmits the pure musical signal without distortion. When the AC-404 provides a rock-solid power foundation for your amplifier or source component, the NF-404 can fully unleash the music’s potential on that foundation.

As inakustik states, the NF-404 Micro Air “unlocks your system’s sonic potential whether used alone or paired with the LS-404 speaker cables.” And the AC-404 Micro AIR “achieves clearer, more refined, and more dynamic music reproduction.” Together, they create not a simple 1+1=2 effect, but a synergistic 1+1>2 transformation.

Conclusion
Germany’s inakustik AC-404 Micro AIR power cord and NF-404 Micro AIR interconnect represent the ultimate application of micro-air insulation technology in both power and signal transmission. From the Micro AIR dielectric, Guided Copper conductor structure, 6-fold multicore architecture, and dual shielding to the rhodium-plated connectors, every detail embodies inakustik’s core philosophy: “Science Creates Sound.” If you are seeking a cable solution that can truly reinvent your audio system, the AC-404 and NF-404 Micro AIR pairing is well worth an in-person listening experience.