Flex Audio 16/4 Outdoor Speaker Cable - 4 Core - LSZH

Flex Audio  |  SKU: 16AWG-4C-20M-EXT

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Sale price £55.00 Regular price £84.99
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Description

The Flex Audio 16/4 OFC External Speaker Cable 16AWG 4 Core is a professional-grade outdoor speaker cable built for permanent installations exposed to the elements, including garden audio, outdoor cinema setups, and any application where the cable run passes outside.

Constructed with 99.9999% pure oxygen free copper conductors, this cable delivers the clean, low-resistance signal path that Hi-Fi and home cinema systems demand — without any compromise for outdoor use.

The UV-resistant black polyethylene (PE) outer sheath is weather resistant to ISO4892-3, making this cable a reliable long-term choice for exposed runs in gardens, outbuildings, soffits, and other external environments.

With four individually colour-coded cores, the cable supports bi-wiring or dual-zone speaker runs from a single external cable, keeping outdoor installations tidy and reducing the number of cable routes required.

  • Outdoor-Ready PE Sheath: UV-resistant black polyethylene outer sheath is weather resistant to ISO4892-3, protecting the cable against sun, rain, and temperature extremes in external installations.
  • Oxygen Free Copper: 99.9999% pure OFC stranded conductors minimise signal loss and maintain audio fidelity over long outdoor cable runs.
  • 4 Core Configuration: Four colour-coded cores allow bi-wiring or two independent speaker zones to be served from a single cable, simplifying external routing.
  • LSZH Core Insulation: Individual conductor insulation is Low Smoke Zero Halogen for added safety in any enclosed sections of the run.
  • EN50575 CPR Rated: Carries an Fca CPR classification, appropriate for external installation applications.
  • Wide Temperature Range: Rated from -20°C to 80°C, covering the full range of UK outdoor conditions and beyond.

Specifications

  • Part Number: QCS016/4-EXT
  • Gauge: 16AWG
  • Number of Cores: 4
  • Conductor: Stranded Pure Oxygen Free Copper (99.9999%)
  • Conductor Size: 16AWG
  • Conductor DC Resistance: <12.6 Ω/km
  • Insulation: LSZH, Ø2.25 mm
  • Filler: Cotton Rope
  • Outer Sheath: UV Resistant External PE, Ø7.50 mm
  • Sheath Colour: Black
  • Weather Resistance: ISO4892-3
  • Colour Code: Core 1 Black, Core 2 Red, Core 3 White, Core 4 Green
  • Operating Voltage: 450/750V
  • Test Voltage: 3000V
  • Insulation Resistance: >200 MΩ/km
  • Rated Temperature: -20°C to 80°C
  • EN50575 CPR Class: Fca
  • RoHS2 Compliant: Yes (2015/863)
  • REACH Compliant: Yes
  • Warranty: 1 Year

Payment & Security

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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Warranty + 60 Day Returns

K&B Audio are authorised retailers for Flex Audio. Your purchase comes with a warranty, expert help on hand and you get 60 day returns window in case you're not 100% happy with the product.

Frequently Asked Questions

Do you price match?

Yes, we will try our best to price match for you - but as a small independent company, we can't always guarantee it.

Please submit a price match request here.

We will price match where possible provided that the competitor is a like for like UK VAT registered company, they must be an authorised retailer, the product must be in stock and not on clearance.

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