Inakustik Speaker 425 (2 x 4m)

The Speaker 425 from Inakustik is a speaker cable from the S25 series, designed for powerful audio systems and installations requiring long cable runs. Made in Germany, it features a multicore architecture and uses carefully selected conductive materials. Its design aims to ensure stable signal transmission, even over long distances.

Multicore Design for Sonic Neutrality

The multicore structure is the technological heart of the Speaker 425. Unlike traditional conductors where strands are chaotically intertwined, this architecture arranges several fine conductors in parallel according to a precise geometry. This methodical layout produces several beneficial effects: a significant reduction in cable inductance, improved high-frequency characteristics, and preservation of signal structure even during fast transients.

The symmetrical distribution of the conductors generates a phenomenon of partial cancellation of magnetic fields, thus minimizing potential interference. This technical approach results in particularly tight and controlled bass reproduction, a stable and expansive soundstage, and fine resolution of details in the treble range, without ever becoming aggressive.

The Speaker 425 stands out as the most powerful model in the S25 series, with a generously sized conductor cross-section specifically designed for demanding applications. This feature makes it particularly suitable for high-power amplifiers and installations requiring long cable runs, situations where signal loss can become problematic with cables of smaller gauge.

Materials and Manufacturing: An Obsession with Detail

The copper used in the Speaker 425 is OFC (Oxygen Free Copper) with a minimum purity of 99.95%. This material choice is no accident: deoxygenated copper offers superior electrical conductivity and limits transition losses, even over long distances. Each copper strand is individually treated to ensure homogeneous conduction throughout the entire length of the cable.

Connections are often the weak link in an audio chain. Inakustik has therefore chosen gold-plated connectors assembled by massive crimping, a technique that ensures optimal mechanical and electrical contact between the conductor and the connector. This assembly method, more expensive than simple soldering, virtually eliminates the risk of hot spots or parasitic resistance at the junction.

Manufacturing is carried out entirely at Inakustik’s facility in Germany, where each cable is hand-assembled and then individually tested. This unitary control checks the perfect continuity of the signal from the connector to the conductor, guaranteeing the absence of manufacturing defects.

Ergonomics and Integration into the Audio Environment

Despite its large cross-section, the Speaker 425 maintains remarkable flexibility thanks to the design of its outer sheath. This flexibility greatly facilitates installation, even in complex setups with multiple racks or wall installations. The cable’s moderate diameter and discreet appearance allow for harmonious integration into any listening environment, without the ostentatious look of some competing cables.

The outer sheath, designed to withstand mechanical stress while maintaining flexibility, effectively protects the internal conductors without introducing constraints that could affect electrical performance. This pragmatic approach reflects Inakustik’s philosophy: prioritizing functionality without sacrificing elegance.

Technical Specifications

Audio Performance

• Multicore structure: symmetrical fine-strand construction for low inductance and high impulse fidelity
• Sound response
  • Deep, precise, and firm bass
  • Well-defined midrange
  • Open and detailed highs
• Soundstage: remarkable spatial stability, even during complex passages
• Reduced resistance and inductance: dynamic transmission without loss
• Faithful, uncolored audio transmission
• Excellent transient response

Main Technical Specifications

• Application: hi-fi speaker cable
• Conductor type: high-purity OFC copper (oxygen-free copper) ≥ 99.95%
• Conductor cross-section: 2 × 5.0 mm²
• Cable diameter: 12.5 mm
• Conductor structure: 50 × 0.25 mm (2.5 mm²)
• Design: 4-strand multicore
• Signal direction indication: yes
• Available lengths: 2 m, 3 m, 4 m, 5 m
• Flexibility: high, despite the large cable cross-section

Materials and Construction

• Conductor material: high-purity OFC copper
• Dielectric: PE
• Sheath: PVC
• Insulation: durable and highly flexible materials
• Color coding: red / black
• Cable color: dark blue
• Special feature: high flexibility
• Finish: discreet, elegant, and functional design

Connectivity and Assembly

• Connection types: SW, SBW
• Available connectors
  • Gold-plated banana plugs
  • Cable lugs
  • Easy Plug (quick connection)
• Connector assembly: crimped under pressure (1.5 tons), screw contacts
• Crimping technology: gas-tight, solderless, stable and durable connection
• Contact material: brass
• Contact treatment: gold-plated
• Fork width: stepped 6 / 8 mm
• Gold-plated connectors: low contact resistance, no oxidation
• Custom assembly: on request
• Easy installation: suitable for complex racks and tight spaces

Quality Control and Compliance

• Individual control: continuity and short-circuit test of all conductors
• Individual continuity test: each cable is checked before shipping
• Compliance: CE, REACH, RoHS
• Quality: Exzellenz
• Maintenance-free: long-term reliability
• Handmade and assembled in Germany

Available Configurations

• Lengths: 2 m, 2.5 m, 3 m, 3.5 m, 4 m, 4.5 m, 5 m
• Box contents: 1 pair of cables (left + right), pre-installed connectors
• Packaging: sturdy recycled cardboard – no unnecessary plastic

General Information

• in-akustik product group: speaker cables
• in-akustik category: Exzellenz speaker cables
• Technology: multicore
• Made in Germany: yes
• Free trial listening: yes
• Manual and FAQ: available online + explanatory video
• First choice for demanding hi-fi systems with long cable runs