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Two Point Five Millimetres Squared
The same argument, in a thinner jacket.
A 2.5 mm² oxygen-free copper twisted pair terminated in gold-plated banana plugs, individually tested for continuity and resistance before it ships.
Unitra KG-25 Speaker Cables
Popular upgrades
Pairs well with
European engineering heritage since 1961 — designed and built to be heard, not simulated.
Unitra KG-25 Speaker Cables
Technical specifications
| Cross-section | 2.5 mm² per conductor |
| Conductor material | Oxygen-free copper (OFC) |
| Resistance | 0.0067 Ω/m per conductor |
| Construction | Two parallel twisted conductors |
| Insulation / separator | Flexible PVC compound filler with PVC cable separator |
| Connectors | Gold-plated, spring-loaded banana plugs |
| Lengths available | 2.5 m or 4 m (set of 2) |
| Operating temperature | 0°C to 80°C |
| Finish | Honey-coloured Polish yarn wrap |
What gauge are the KG-25 cables, and is it enough for my system?
Each conductor is 2.5 mm² of oxygen-free copper, a capable cross-section for typical bookshelf and floorstanding speakers over domestic run lengths. For low-impedance speakers over longer distances, the thicker KG-40 (4 mm²) is the step up.
What connectors do they use?
What lengths are available?
Is every cable actually tested, or is that just marketing?
What's the difference between the KG-25 and KG-40?
Both use the same OFC copper, twisted-pair construction and gold-plated banana plugs. The KG-40 steps up to a 4 mm² conductor and adds an aluminium cable separator, aimed at longer runs or more demanding loads. The KG-25 is the right choice for most standard listening-room distances.
Why the honey-coloured yarn finish?
About the Unitra KG-25 Speaker Cables
Clean, Efficient Signal Transfer for Any Hi-Fi System
The Unitra KG-25 Speaker Cables are crafted from pure oxygen-free copper (OFC) with a 2.5 mm² cross-section, delivering clean, efficient signal transfer that's ideal for Hi-Fi systems. Parallel-twisted conductors and gold-plated banana plugs bring an audible, worthwhile upgrade over generic bell wire — without overpaying for exotic marketing. Supplied as a terminated pair, ready to connect.
The Right Cable for Most Systems
A 2.5 mm² OFC conductor keeps wire resistance to just 0.0049 Ω/m, low enough to preserve your amplifier's grip and dynamics across typical speaker runs. Oxygen-free copper resists the oxidation that degrades cheaper wire over time, while the parallel-twisted geometry helps keep the signal clean and consistent from amp to speaker.
Ready to Connect, Built to Last
Each KG-25 cable is terminated with gold-plated flexible banana plugs that fit a wide range of terminals and resist corrosion for a reliable connection year after year. A flexible PVC compound filler and PVC inner jacket keep the cable durable, easy to dress and stable in geometry. Choose 2.5 m or 4 m to suit your layout.
Why You'll Love the KG-25
- Pure oxygen-free copper (OFC), 2.5 mm² cross-section
- Low resistance (0.0049 Ω/m) preserves amplifier grip and dynamics
- Parallel-twisted conductors for clean, consistent transfer
- Gold-plated flexible banana plugs fit most terminals
- Supplied as a terminated pair in 2.5 m or 4 m lengths
Frequently Asked Questions
Do the KG-25 come with banana plugs?
Yes. Each cable is terminated with gold-plated flexible banana plugs that fit a wide range of amplifier and speaker terminals.
Which should I choose — KG-25 or KG-40?
The KG-25's 2.5 mm² conductor is ideal for most Hi-Fi systems and typical runs. Step up to the KG-40's 4 mm² conductor for longer runs or more demanding, lower-impedance speakers.
What lengths are available?
Supplied as a pair in either 2.5 m (8.2 ft) or 4 m (13.1 ft).
KG-25 Technical Specifications
| Material | Oxygen-free copper (OFC) |
| Cross-section | 2.5 mm² |
| Wire resistance | 0.0049 Ω/m |
| Conductor type | Parallel-twisted |
| Termination | Gold-plated flexible banana plugs |
| Inner jacket / filler | Flexible PVC compound |
| Operating temperature | 0°C to 80°C (32°F to 176°F) |
| Lengths | 2.5 m (8.2 ft) or 4 m (13.1 ft) |
| Quantity per package | 2 (pair) |
