€315.00*
The S25 Speaker 425 is the most powerful model in the series, designed for audiophile setups with high power reserves and long cable runs. The large conductor cross-section and low-inductance multicore design ensure exceptionally low-loss transmission – even under high load or long cable lengths. The sound benefits from a particularly controlled, deep-reaching bass with precise punch, clearly defined mids, and an open, detailed high-frequency reproduction. The spatial presentation is stable and wide. Thanks to high-quality materials such as fine-stranded OFC copper, solid crimp contacts, and gold-plated connectors, the signal remains unaltered along the entire length. Its discreet, functionally elegant design and surprisingly high flexibility despite the large cross-section allow for neat, unobtrusive installation – even in complex rack setups or close to walls.
Click here to discover exciting details| Application: | HiFi speaker cable |
|---|---|
| Cable diameter: | 12.5 mm |
| Coding: | Red | Black |
| Color: | Darkblue |
| Conductor cross-section: | 2 x 5 mm² (4 x 2.5 mm²) |
| Conductor design: | 50 x 0.25 mm (2.5 mm²) |
| Conductor material: | High-purity OFC copper |
| Conformity: | CE, REACH, RoHS |
| Connection type: | SBW, SW |
| Connector assembly: | Pressure-grouted contacts (1.5 tonnes), Screw contacts |
| Contact enhancement: | Gold-plated |
| Contact material: | Brass |
| Customized assembly: | On request |
| Design: | 4-fold multicore |
| Dielectric: | PE |
| Fork width: | Stepped 6/8 mm |
| Indicated signal direction: | Yes |
| Individual inspection: | Continuity and short circuit testing of all conductors |
| Jacket: | PVC |
| Length: | 2 m, 2,5 m, 3 m, 3,5 m, 4 m, 4,5 m, 5 m |
| Special feature: | Highly flexible |
| in-akustik product group: | Loudspeaker cables |
| in-akustik category: | Exzellenz speaker cables |
| Quality: | Exzellenz |
| Technology: | Multicore |
| Connector: | Banana Cable lug Easy Plug |
| Made in Germany: | Yes |
| Free trial listening: | Yes |
- 1 x Stereo Set S25 Speaker 425
If you have any questions about product safety, please contact:
in-akustik GmbH & Co. KG
Untermatten 12-14
79282 Ballrechten-Dottingen
Germany
Tel.: +49 (0) 7634 5610-0
E-Mail: service@in-akustik.de
The S25 Speaker 425 is the most powerful model in the series, designed for audiophile setups with high power reserves and long cable runs. The large conductor cross-section and low-inductance multicore design ensure exceptionally low-loss transmission – even under high load or long cable lengths. The sound benefits from a particularly controlled, deep-reaching bass with precise punch, clearly defined mids, and an open, detailed high-frequency reproduction. The spatial presentation is stable and wide. Thanks to high-quality materials such as fine-stranded OFC copper, solid crimp contacts, and gold-plated connectors, the signal remains unaltered along the entire length. Its discreet, functionally elegant design and surprisingly high flexibility despite the large cross-section allow for neat, unobtrusive installation – even in complex rack setups or close to walls.
Click here to discover exciting detailsThe S25 Speaker 415 is the versatile solution in the series, impressing both sonically and technically with neutrality, control, and dynamics. The multi-stranded multicore design reduces cable inductance, supporting precise and fast signal transmission. The sound features a defined, powerful bass foundation, cleanly layered mids, and a pleasant openness in the highs – never harsh, but present. The spatial imaging remains stable even at higher volumes. The cable is mechanically robust yet flexible – its unobtrusive jacket and moderate diameter allow for discreet integration into existing hi-fi setups, furniture, or cable ducts.
Click here to discover exciting detailsThe S25 Speaker 225 is the compact solution in the S25 series and ideal for small setups. It impresses with solid performance and surprisingly good spatial imaging. The bass remains controlled and precise without bloating, the mids sound focused, voices natural and tangible. The highs are detailed without harshness. Its slim, discreet design combined with high flexibility makes it especially easy to install – whether visibly on open shelves, behind furniture, or in tight cable channels. This allows the Speaker 225 to seamlessly integrate into almost any setup – both acoustically and visually.
Click here to discover exciting details€315.00*
€286.00*
€245.00*
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Sound doesn't start at the speaker
Speaker cables are far more than just wires between the amplifier and the speaker – they help determine how much of the music actually reaches you. Electrically, every cable acts like a filter made up of resistance, inductance, and capacitance. These characteristics influence whether details are preserved or whether highs lose brilliance and lows lose precision. Especially with speaker cables, conductor cross-section, copper quality, and construction are crucial for low-loss, dynamic signal transmission. The S25 series relies on high-purity OFC copper, well-designed multicore constructions, and flexible, durable materials. This keeps the music signal clear, true to impulse, and authentic – so you hear what's really on the recording. A good cable doesn’t color the sound, it transmits it: It is the solid bridge between your components and musical expression.
Multicore technology: More control, more sound
A key technical feature of the S25 speaker cables is their multicore design. Unlike traditional conductors, several fine-stranded individual wires run in parallel – this reduces inductance, improves high-frequency performance, and preserves signal integrity even during fast transients. The symmetrical distribution of the conductors also minimizes interference, as magnetic fields partially cancel each other out. This is especially evident in the Speaker 415 and 425 models, delivering tight, well-defined bass, precise imaging, and brilliant high-frequency detail. The result: high impulse fidelity, greater control, and a spatial soundstage that remains stable – even during complex passages.
OFC copper: Pure material for pure music
For the S25 series, we use only high-purity, oxygen-free copper (OFC) with a purity level of at least 99.95%. This material offers excellent electrical conductivity and reduces transmission losses – even over long cable runs or with high current flow. OFC copper is also highly resistant to corrosion, ensuring long-term sound stability. Combined with high-quality insulation materials and gold-plated connectors, the signal remains unaltered – from the amplifier output to the speaker terminals. S25 cables deliver music with high transparency and authentic dynamics – honest, direct, and without artificial coloration.
Crimp technology & gold-plated contacts
Connector joints are critical points in any signal path – they determine whether sound quality remains consistent. The S25 series uses professional crimp technology: fine-stranded copper conductors are gas-tight pressed under high pressure, effectively preventing corrosion and ensuring lasting contact stability. Gold-plated plugs provide consistently low contact resistance and are resistant to oxidation – even with frequent plugging and unplugging. This combination guarantees a reliable, sonically clean connection that neither swallows details nor slows down dynamics. For lasting sound fidelity – completely maintenance-free.
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Well-engineered technology
The S25 series combines high-quality materials, thoughtful engineering, and skilled craftsmanship into an audiophile cable concept that makes high-end sound accessible to newcomers.
Every cable a promise: Quality assurance in the S25 series
Before any S25 series cable leaves our workshop, it is individually tested for complete signal continuity. This ensures that every connection, from plug to conductor, functions flawlessly. This final inspection is part of our uncompromising commitment to quality – because even at the entry point to high-end hi-fi, every detail matters to us.
Manufacture quality for entry into high-end
The S25 series was developed as an entry point into the world of high-end hi-fi – 100% made in Germany. Each cable is created in our in-house workshop: carefully handcrafted, individually tested, and technically refined down to the last detail. We invest in high-quality materials, solid expertise, and genuine craftsmanship – not in glossy foil or excessive packaging. The sturdy cardboard packaging protects what matters: your listening experience. Because sound is not created by appearances, but by quality – honest, direct, and authentic.
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