10 AWG · 4-Conductor · CL3 OFC

10/4 Direct Burial Speaker Wire

Whole-property outdoor audio in a single cable run. 10 AWG, 4-conductor, CL3-rated OFC for distributed high-power systems.

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  • ★ Lifetime warranty
  • ★ Free shipping over $25
  • ★ ETL listed · UL standards

Overview

The spec for whole-property outdoor audio

10/4 direct burial speaker wire is the specification for whole-property outdoor audio — large estate systems, commercial landscape audio, resort and hospitality installations where a single cable run needs to service multiple speaker zones at long distances.

The 4-conductor format means one trench serves two speaker pairs. At 10 AWG, each conductor pair maintains low resistance even at 200+ ft runs, preserving amplifier damping factor and output level at distant speaker locations. The CL3-rated UV-stable jacket handles both the buried portion and any surface runs along fencing, exterior walls, or conduit entry points.

This is the gauge and format specified by professional audio contractors for distributed outdoor audio systems. It simplifies trench planning, reduces installation time, and future-proofs the system for additional amplifier zones — the 4-conductor format supports stereo, dual mono, or zone-switching configurations depending on the distribution amplifier used.

Two-step picker

Two questions decide the right speaker wire.

How long is the run and how much power the amp pushes. Use the picker, then choose the conductor that fits the budget and the room.

1 Pick the gauge 2 Pick the conductor
1 Step 1 · Pick the gauge

Thicker wire = lower resistance = cleaner power.

Every foot of speaker wire adds a tiny amount of resistance between the amp and the driver. The longer the run and the higher the wattage, the thicker the conductor needs to be to keep voltage drop under 5%.

  • Short runs (<50 ft): 16 AWG is plenty.
  • Most home theaters: 14 AWG sweet spot.
  • Long / high-power runs: step up to 12 or 10 AWG.
Interactive · gauge picker

Tell us the run. We'll size the wire.

5 ft
5 ft50100150200+ ft
Amplifier power per channel
Recommended
14 AWG OFC OFC speaker wire

Short home-theater run — 14 AWG OFC is the sweet spot for 5.1 / 7.1.

Shop 14 AWG OFC
2 Step 2 · Pick the conductor

OFC vs CCA — the single biggest sound-quality decision.

Copper-clad aluminum looks like copper but is mostly aluminum, with roughly 60% more resistance. Over a 50 ft run pushing real wattage, you can measure (and hear) the difference.

Interactive · conductor picker

What are you wiring up?

Pick the scenario that fits and we'll tell you which conductor wins.

Recommended · OFC
OFC — the home-theater standard.

5.1 / 7.1 receivers and longer runs to surrounds reward pure copper. Lower resistance means cleaner dialogue, tighter bass, and full headroom on dynamic scenes.

Shop OFC speaker wire
SPEC
OFC PICK
Oxygen-Free Copper
CCA PICK BUDGET
Copper-Clad Aluminum
Conductor
99.9% pure copper
Aluminum core, copper skin
Resistance vs OFC
Baseline (lowest)
≈ 60% higher
Best run length
Up to 200+ ft
Under 50 ft
Power handling
Any amp, any speaker
Low to mid power
In-wall code
CL2 / CL3 available
Indoor short runs
Recommended for
Home theater · pro · outdoor
Budget DIY · cars

Top picks

10/4 Direct Burial Speaker Wire CL3 OFC Copper — top picks.

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FAQ

Questions buyers actually ask.

What does the 4-conductor configuration let me do that 2-conductor does not?
Four conductors in a single cable let you run two separate stereo speaker pairs through one buried cable. Instead of digging two trenches or pulling two cables, you run one 10/4 cable and split it at the far end to two speaker locations. This is the standard approach for distributed outdoor audio systems.
How do I wire a 4-conductor cable to two speakers?
Treat conductors 1 and 2 as the first speaker pair (positive and negative) and conductors 3 and 4 as the second speaker pair. At the amplifier end, connect each pair to a separate amplifier channel or zone. At the speaker end, connect each pair to the corresponding speaker terminals.
What amplifier power level is appropriate for 10/4 at 200 feet?
10 AWG handles high-power amplifiers well even at 200 feet. For a distributed outdoor system at that distance, a zone amplifier in the 100 to 200 watt range per channel is appropriate. Make sure your amplifier is rated for the total speaker load across all connected zones.
Can I use 10/4 for bi-amping a single high-power speaker pair?
Yes. If you have speakers with separate tweeter and woofer binding posts, 10/4 lets you run all four conductors to a single speaker pair and use two amplifier channels for bi-amp configuration. This is common in high-end outdoor speaker installs where the speakers support bi-amping.
Is there a minimum order quantity for 10/4 direct burial?
We sell by the spool, no minimum beyond that. For project quantities or if you need a custom length, contact support@gearit.com and we can discuss options.