Speaker Wire, Ethernet, and AV Wiring: What's the Difference?
Not all cables are the same. Here is a plain-language breakdown of speaker wire, Ethernet, and AV cables — what each one does, when you need it, and whether they can run together.
Speaker Wire: Carrying Audio Signals
Speaker wire is designed for one job: delivering audio signals from an amplifier or AV receiver to passive speakers. It consists of two copper conductors — a positive and a negative — usually bundled together in a simple jacket. Speaker wire comes in different gauges, with 16-gauge and 14-gauge being the most common for residential installations. Thicker wire (lower gauge number) handles longer runs with less signal loss, which matters when you are running cable from an AV rack to surround speakers across a large room. For most living rooms and home theaters, 16-gauge speaker wire handles runs up to about 50 feet without noticeable quality loss. For longer runs — like wiring outdoor speakers on a patio or running to ceiling speakers in another room — 14-gauge or even 12-gauge is a better choice. Speaker wire does not carry data, video, or network signals. It is purely an analog audio cable. If you are setting up a surround sound system as part of a home network wiring , speaker wire runs from the receiver to each speaker location are a core part of the project.
Ethernet Cable: Data and Network Connectivity
Ethernet cable carries digital data between devices on your home network. It is the backbone of any wired network setup, connecting computers, streaming devices, gaming consoles, smart TVs, and network switches to your router. The most common residential Ethernet cable categories are Cat5e and Cat6. Cat5e supports speeds up to 1 Gbps, which is sufficient for the vast majority of home applications. Cat6 supports up to 10 Gbps over shorter distances and provides better shielding against interference, making it the preferred choice for new installations. The physical cable looks different from speaker wire — Ethernet cable contains four twisted pairs of thin copper wires inside a single jacket, terminated with an RJ45 connector. The twisting of each pair is intentional: it reduces electromagnetic interference and crosstalk between the pairs, which is critical for maintaining high data transfer rates. Ethernet cable can also carry power using PoE (Power over Ethernet) technology, which is how many security cameras and access points receive both data and electrical power through a single cable run. Professional network wiring typically involves running Cat6 cable through walls and terminating each end at a keystone jack or patch panel for a clean, permanent installation.
AV Wiring: HDMI, Optical, and Component Cables
AV wiring is a broader category that includes any cable carrying audio and video signals between entertainment devices. The most common AV cable in modern homes is HDMI, which carries both high-definition video and multi-channel audio through a single cable. HDMI 2.1, the current standard, supports 4K at 120Hz and 8K at 60Hz — more than enough for any current consumer display. Other AV cables include optical (Toslink) cables for digital audio, coaxial cables for cable TV and antenna signals, and component cables for legacy video equipment. In a typical home theater setup, HDMI cables connect your streaming device, Blu-ray player, and gaming console to your AV receiver, which then sends video to the TV and audio to the speakers. Running HDMI through walls requires some planning. Standard HDMI cables are not rated for in-wall use — you need CL2 or CL3 rated HDMI cables that meet fire safety standards for concealed installation. For longer runs over 25 feet, active HDMI cables or fiber optic HDMI cables maintain signal quality where passive cables start to degrade. Your technician can recommend the right cable type based on your specific run length and wall construction.
Can You Run These Cables Together?
A common question during home installations is whether speaker wire, Ethernet, and HDMI can share the same wall cavity or conduit. The short answer is yes, with some guidelines. Speaker wire and Ethernet cable can run alongside each other without issues in most residential scenarios. The signal frequencies are different enough that interference is minimal, especially with Cat6 cable that includes additional shielding. HDMI cables can also share a wall cavity with Ethernet and speaker wire. However, all of these low-voltage cables should maintain separation from high-voltage electrical wiring (the 120V lines that power your outlets and lights). Building codes typically require at least one inch of separation between low-voltage and high-voltage wiring when they run parallel, and they should cross at 90-degree angles when they must intersect. For larger projects that involve running multiple cable types through the same walls — like a full home theater build with surround speakers, a wired network connection, and HDMI from a media closet — using conduit makes future upgrades much easier. A conduit provides a protected pathway through the wall that allows you to pull new cables without opening up drywall again. TV Solutions handles all types of cable runs for homeowners, from single Ethernet drops to complete home theater wiring packages. Get a quote for your project and find out exactly what is involved.