Speaker Cables and Wires, by the Meter

Choosing the right cable cross-section

Cable cross-section directly influences the conductor’s resistance and thus transmission quality. For distances of 1 to 10 meters, a 1.5 to 2.5mm² cross-section suits most setups. Beyond 10 meters or for powerful systems, a 4mm² cross-section or larger reduces signal loss and preserves sound dynamics.

The amplifier doesn’t distinguish the cable from the speaker: it perceives a whole whose resistance and capacitance affect its behavior. A suitable cross-section ensures that the audio signal, which spans frequencies from 20Hz to 20kHz, reaches the speakers intact.

OFC copper and conductive materials

OFC copper (Oxygen-Free Copper), refined to 99.99% oxygen-free, offers higher conductivity than standard copper. This multi-strand material provides flexibility and durability. Some high-end cables incorporate silver-plated copper to further enhance conductivity, particularly at high frequencies.

Connector types and binding posts

Your speakers and amplifier may be equipped with spring-clip (push-button) or screw-type binding posts. Spring clips accept 1.5 to 2.5mm² bare wire only. Screw-type posts are more versatile and compatible with banana plugs, spades, or stripped bare wire.

Banana plugs simplify connections and maintain a solid, long-lasting contact. They slide directly into the binding post without requiring periodic re-tightening. Spades are suitable for screw posts and provide a secure hold once the collar is tightened.

Observing polarity

Each binding post includes a positive terminal (usually red) and a negative terminal (black). You must connect the amplifier’s red terminal to the speaker’s red terminal, and do the same with the black terminals. A phase inversion causes the cones to move in opposite directions, creating an incoherent soundstage and losses at certain frequencies.

Speaker cables include visual markers: different sheath colors, distinct profiles, or “+” and “-” markings printed along the entire length.

Matching cable length to your setup

Cable length should match the actual distance between the amp and the speakers. An overly long cable coiled on itself generates unwanted inductance. A cable that’s too short may place undue strain on the connectors. Buying by the meter lets you tailor the length precisely to your needs.

Considering the electromagnetic environment

Electronic devices (Wi-Fi routers, cordless phones, microwave ovens) generate electromagnetic interference that can affect the audio signal. In a highly noisy environment or when installing many cables in parallel, opt for a larger cross-section cable and possibly shielding.

For a standard home setup with entry-level components in a low-interference environment, a multi-strand copper cable with a 1.5 or 2.5mm² cross-section is more than sufficient.

Geometry and design

Cable structure affects its electrical properties. Twisted cables reduce interference. The dielectric (insulating) material also influences performance: PTFE (Teflon) offers excellent properties, while PVC or polyethylene are used in standard cables.

Matching your equipment

A speaker cable won’t turn a modest system into a high-fidelity setup. Its role is to preserve signal integrity between the amplifier and the speakers. Your choice should align with your equipment’s quality level: there’s no point investing in a premium cable for entry-level speakers, just as a basic cable will limit a high-end system’s performance.

Buying by the meter lets you tailor your purchase precisely to your actual needs, avoiding unnecessary cost and clutter. Whether you’re building a hi-fi setup, a home theater system, or replacing existing wiring, choosing the right cross-section and length ensures optimal audio transmission.