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White 18AWG CL3 4-conductor speaker wire on spool

Monoprice Inc.

Monoprice Inc. 44339 18AWG CL3 4-Conductor Speaker Wire 250ft White

SKU CH-BB26-5AY0M

CL3-rated 18 AWG four-conductor speaker wire on a 250 ft reel uses pure bare copper for low resistance and colour-coded PVC jackets for easy polarity identification

  • CL3 rating supports safe in-wall installation
  • 95% pure copper conductors minimise resistance
  • Four colour-coded conductors simplify polarity identification
  • 250 ft length covers whole-home audio runs
  • Pure bare copper outperforms copper-clad aluminium by 68%

What this wire is and who it suits

Monoprice 18AWG CL3 4-conductor speaker wire comes on a 250ft reel for whole-home audio runs. Pure bare copper conductors exceed 99.95% purity, offering lower resistance than copper-clad aluminium alternatives. The CL3 rating allows in-wall installation for multi-room systems. It serves installers and DIYers wiring stereo pairs or bi-amp speakers.

What to verify before ordering

Confirm your amplifier and speaker impedance curves; total loop resistance should stay below 5% of the lowest impedance dip. Check that four conductors match your wiring plan — two per channel for bi-wiring or separate zones. Ensure local code accepts CL3 for the intended wall cavity. Measure each run so the 250ft spool covers all distances without splices.

Build quality and daily implications

Each conductor carries colour-coded PVC insulation for quick polarity identification during termination. Pure bare copper keeps resistance low, preserving amplifier damping factor across the frequency range. The 18AWG gauge balances flexibility for pulling through studs with adequate cross-section for typical home runs. White outer jacket blends with ceilings and baseboards for clean aesthetics.

Highlights

  • CL3 rating supports safe in-wall installation
  • 95% pure copper conductors minimise resistance
  • Four colour-coded conductors simplify polarity identification
  • 250 ft length covers whole-home audio runs
  • Pure bare copper outperforms copper-clad aluminium by 68%

Specifications

No published specifications for this item yet.

Questions about this item

Does the 250 ft roll include connectors or banana plugs?

The roll supplies only the bare 18 AWG four-conductor cable with colour-coded PVC jackets; connectors or banana plugs must be purchased separately.

When should I choose the four-conductor version over a two-conductor version?

Choose the four-conductor 44339 when you need a single run for bi-wiring, bi-amping or two separate speaker channels, reducing the number of cables pulled through walls.

How does the 99.95 % pure bare copper affect resistance compared with copper-clad aluminium?

Pure bare copper is about 68 % more conductive than CCA, so the 18 AWG conductors keep total loop resistance well below 5 % of a typical 4–8 ohm speaker load, preserving the amplifier’s damping factor.

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