Audio & Video Cables

The different types of cables for home theater

HDMI cables remain essential in any modern setup. They carry both video and audio in high definition through a single cable, greatly simplifying wiring. HDMI 2.0 and 2.1 cables ensure compatibility with 4K and 8K resolutions, high refresh rates, and HDR. ARC and eARC functions enable audio return from the TV to the amplifier or soundbar, eliminating the need for a separate audio cable. To enjoy immersive formats like Dolby Atmos and DTS:X, eARC becomes indispensable.

Optical cables (Toslink) use fiber optics to transmit the digital audio signal as light. This technology offers complete immunity to electromagnetic interference and ensures perfect galvanic isolation between devices. Ideal for connecting a TV, Blu-ray player, or game console to a home theater receiver or soundbar, they support multichannel Dolby Digital and DTS 5.1 formats. Their effectiveness remains optimal up to 5 meters; beyond that, opt for a coaxial cable.

RCA cables (also known as Cinch) are recognizable by their colored connectors, traditionally red and white for stereo audio. This analog connector is still found on many devices for audio links between sources and amplifiers. Digital coaxial RCA cables, with their 75-ohm impedance, transmit digital audio streams, including multichannel formats.

XLR cables use a three-pin balanced transmission that significantly reduces interference. Reserved for high-end and professional equipment, they can carry signal without loss over very long distances (up to 100 meters). They are found on amplifiers, DACs, and audiophile players to achieve exceptional sonic transparency.

Selection criteria

Cable length directly affects transmission quality. For HDMI and RCA cables, choose the shortest possible distance between your devices. A 1 to 2 meter cable is usually sufficient for nearby components, while 3 to 5 meters suits a living room. Beyond 5 meters, some technologies require cables with built-in amplifiers or repeaters.

Build quality determines performance and durability. OFC (Oxygen-Free Copper) conductors ensure better conductivity. Shielding protects against electromagnetic interference. Gold-plated connectors resist oxidation and ensure long-lasting optimal contact.

Compatibility with your equipment is crucial. Check the connector types available on your devices (standard, mini, or micro HDMI, Toslink, RCA, XLR) and supported formats (video resolutions, audio formats). For a future-proof setup, anticipate your needs by choosing cables certified for the latest standards.

Installation and use

For a complete home theater system, you will generally need several types of cables: HDMI for primary video and audio, optical or coaxial for secondary audio connections, RCA for certain older devices, and speaker cables to connect the amplifier to the speakers.

Avoid running audio and video cables parallel to power cables over long distances to reduce the risk of interference. Optical cables are more fragile and should not be twisted or bent with too tight a radius. For in-wall installations, choose sufficiently high-quality cables from the outset, as replacement later can be complex.

Choosing cabling that matches the level of your setup ensures you get the most from your equipment without unnecessary overspending.