Loudspeaker cable - 4 x 2.5 mm² - 13 AWG - FlamoFlex™

The CLS425 cable is a 4-core installation loudspeaker cables featuring a flamoflex™ outer jacket compliant to the IEC60332-1 standard regarding fire and flamabilty resistance in public installations. The flamoflex™ material is specifically designed with installers convenience in mind offering a smooth and durable outer jacket for easy installation and pulling. The cable consist of individualy NHFR isolated conductors with a section of 4 x 2.5 mm² (13 AWG) which are composed out of stranded tinned copper wires. The stranding keeps the cable flexible and easy to handle, while the tinned copper conductor material improves the corrosion and oxidation resistance of the cable, enabling it to be used indoors as well as outside, in humid or marine environments.

Inner Conductors



  • CLS425/3 - 300 m plastic reel

Available now

  • CLS425/1 - 100 meter wooden reel


  • 13 AWG thin and dense stranded conductors
  • Flamoflex™ IEC 60332-1 installation jacket
  • 4 conductors for 2-channel loudspeaker connection
  • IEC 60332-1 NHFR compliant

Cross section

  • Cross section CLS425 - Loudspeaker cable - 4 x 2.5 mm² - 13 AWG - FlamoFlex™
Physical Characteristics
Type of cable 4-core loudspeaker cable
Inner conductor Material TC 50 x 0.25 mm (Ø) (OFC)
Section 2.5 mm²
American Wire Gauge 13 AWG
Number of conductors 4
Insulation Material NHFR 2.7 mm (Ø)
Colours Black / Red / Blue / Yellow
Filling None
Separator Al-Mylar
Outer jacket Material NHFR 9.5 mm (Ø)
Colours Black
Electrical Characteristics
Dielectric strength 2 (KV / 1 min. DC)
Rated voltage 300 V
Max. conductor DC resistance 8.96 (Ω / Km)


Self-extinguishing properties when exposed to a small flame.

Find out more about IEC60332


An extra layer of protection in case of fire.

Find out more about LSHF

Meter indicator

Convenient indication on every meter of cable.

Find out more about Meter indicator


Specifically designed with safety installers convience in mind.

Find out more about Flamoflex™
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