The Flex Audio 16/4 OFC Speaker Flex 16AWG 4 Core is a professional-grade LSZH speaker cable designed for high-quality fixed installation in Hi-Fi, home cinema, and multi-room audio systems.

Built around 99.9999% pure oxygen free copper conductors, this cable is engineered to deliver the cleanest possible signal path from amplifier to speaker, ensuring your system performs at its absolute best.

The LSZH (Low Smoke Zero Halogen) outer sheath meets IEC60332-1, IEC60754, and IEC61034 standards, making it a responsible and regulation-compliant choice for installations in occupied buildings, schools, and commercial premises where fire safety is a priority.

With four individually colour-coded cores, this cable is ideal for bi-wiring or running two independent speaker zones from a single cable run.

• Oxygen Free Copper: 99.9999% pure OFC conductors deliver maximum conductivity and minimal signal loss for audiophile-grade performance.
• LSZH Sheath: Low smoke, halogen-free outer sheath reduces toxic emissions in the event of fire, complying with IEC60332-1, IEC60754, and IEC61034.
• 4 Core Configuration: Four colour-coded cores support bi-wiring or dual-zone speaker runs from a single cable, simplifying installation.
• EN50575 CPR Rated: Carries an Eca CPR classification as standard, with Cca, s1a, d1, a1 available for projects with higher fire performance requirements.
• Wide Temperature Range: Rated from -20°C to 80°C, suitable for demanding installation environments.
• Cotton Rope Filler: Internal cotton rope filler maintains the cable's round profile for neat, professional termination.

Specifications

• Part Number: QCS016/4
• Gauge: 16AWG
• Number of Cores: 4
• Conductor: Stranded Pure Oxygen Free Copper (99.9999%)
• Conductor Size: 41/0.2
• Conductor DC Resistance: <12.6 Ω/km
• Insulation: LSZH, Ø2.25 mm
• Filler: Cotton Rope
• Outer Sheath: LSZH, Ø7.50 mm
• Sheath Colour: Pink
• 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: Eca (Cca, s1a, d1, a1 also available)
• LSZH Standards: IEC60332-1 (Flame Propagation), IEC60754 (Halogen Free), IEC61034 (Smoke Emissions)
• RoHS2 Compliant: Yes (2015/863)
• REACH Compliant: Yes