Triangle OPERA OS100C - 2.5mm

This speaker cable by the meter from Triangle embodies the philosophy of a French manufacturer that, for over 40 years, has cultivated the art of uncompromising audio transmission. With its 2 × 2.5 mm² cross-section and OFC copper with tin plating, the OPERA OS100C is designed for demanding hi-fi and home theater systems, particularly well-suited for floorstanding and bookshelf speakers. Its technical design prioritizes neutrality and faithful transmission—qualities that Triangle, a manufacturer based in Soissons, has always placed at the heart of its acoustic creations.

Technical Construction and Material Choices

The OPERA OS100C is built on a two-conductor architecture, each 2.5 mm², using 99.99% pure OFC (Oxygen-Free Copper). This copper quality, achieved by melting under strictly controlled conditions to eliminate oxygen, features a more homogeneous crystalline structure than standard industrial copper. The tin plating applied to the conductors provides effective protection against natural copper oxidation, ensuring stable conductivity over time.

The helical braiding of the strands contributes to the cable’s flexibility while reducing electromagnetic interference that could affect transmission. This geometry also promotes an even distribution of current, which is important for reproducing fast transients and dynamic nuances.

The transparent PVC outer sheath, beyond its practical aspect for visual identification, includes discreet yet effective polarity markers. This transparency allows for visual inspection of the conductors’ integrity and makes it easier to identify polarity during connections.

Transmission Characteristics and Acoustic Performance

The 2.5 mm² cross-section places this cable in a versatile range, capable of efficiently carrying power up to 100 watts without significant loss, even over long distances. The low linear resistance of OFC copper helps maintain a proper damping factor between the amplifier and the speakers, thus preserving control over the drivers, especially in the low frequencies.

Users report a balanced sound signature, with no particular coloration in the mid-high range. This neutrality is due to the copper’s purity and the absence of surface oxidation thanks to the tin plating. The cable’s stable electrical characteristics allow for faithful transmission of both the complex signals of home theater and the subtle nuances of acoustic music.

The helical braiding helps to effectively reject surrounding electromagnetic interference, which is especially appreciated in setups with many electronic devices.

Implementation and System Compatibility

The OPERA OS100C is particularly well-suited for Triangle speakers, creating coherence throughout the transmission chain, but its neutrality allows it to pair well with most quality speakers. Its flexibility makes it easy to run through conduits and discreet routing, while the PVC sheath’s durability stands up to repeated handling.

Stripping the cable does not cause excessive fraying of the strands, making it easy to connect to screw terminals or insert into banana plugs and spades. This build quality is noticeable during installation, where the stability of the strands simplifies clean and durable connections.

For home theater systems, this cable is perfectly suited for main and surround speaker connections, with its cross-section allowing for various lengths according to architectural constraints without notable signal degradation.

Applications and Usage Limits

This cable is ideally suited for mid- to high-end hi-fi systems, as well as home theater setups up to 100 watts per channel. Its value for money makes it accessible without compromising performance—an ideal balance for enthusiasts looking to optimize their setup without overspending.

However, the 2.5 mm² cross-section may be limiting for very powerful amplifiers or speakers with particularly high current demands. Similarly, the relatively large diameter may pose challenges with some older equipment featuring undersized terminals, sometimes requiring the use of suitable connectors.

The absence of specific shielding makes it less suitable for environments with particularly high interference, although the helical braiding offers reasonable protection under standard domestic conditions.

Technical Specifications

General Specifications

• Price per meter

Construction

• Section: 2 × 2.5 mm²
• Material: oxygen-free copper (OFC)
• Protection: anti-oxidation treatment