Introduction to the SFX 4‑Core LSZH Speaker Cable and its key features
The SFX 4‑Core LSZH Speaker Cable (SFX/SPK‑PRO‑4C‑LSZH‑PNK‑100) is a professional‑grade audio installation cable supplied on a convenient 100 m reel. Built with oxygen‑free copper (OFC) multi‑strand conductors and a Low Smoke Zero Halogen (LSZH) insulation and outer jacket, this cable is engineered for demanding AV projects where audio performance, safety and code compliance matter. Its four colour‑coded cores (Red, Black, White, Green) make it ideal for multi‑speaker, bi‑amping or complex audio routing tasks, while the pink LSZH sheath (RAL 3015) provides both a distinctive finish and reduced toxic emissions in the event of a fire.
Key specifications at a glance
- Product code: SFX/SPK‑PRO‑4C‑LSZH‑PNK‑100
- Length: 100 m reel
- Cores: 4 (Red, Black, White, Green)
- Conductor: Oxygen‑free copper (OFC), multi‑strand (30 × 0.25 mm), 1.31 mm² (equivalent to 16 AWG)
- Insulation / jacket: LSZH (Low Smoke Zero Halogen), Pink (RAL 3015)
- Overall diameter: 7.50 ± 0.20 mm; jacket thickness: 0.60 ± 0.01 mm; insulation thickness per core: 0.31 mm
- Electrical: rated voltage 300/500 V; conductor DC resistance <12.6 Ω/km @ 20 °C; insulation resistance >200 MΩ/km @ 20 °C
- Temperature rating: −40 °C to +70 °C
- CPR / Flame classification: Fca
Detailed description: construction and benefits
The SFX 4‑Core speaker cable combines materials and construction choices that balance audio performance, installation practicality and safety. The conductors are made from oxygen‑free copper (OFC) in a multi‑strand configuration (30 × 0.25 mm strands per core), delivering a cross‑sectional area of 1.31 mm² — equivalent to 16 AWG. OFC is commonly used in professional audio because it offers low resistance and improved conductivity over standard copper, helping to preserve signal integrity across longer runs and reducing losses that could affect speaker performance.
The use of four separately insulated cores inside a common sheath provides flexibility for modern AV systems. You can run stereo plus a subwoofer, implement bi‑amping or multi‑amp arrangements, or feed multiple speaker lines from a single, tidy conduit. Colour‑coded cores simplify terminations and reduce the chance of wiring mistakes on site.
Safety and compliance are addressed through the LSZH insulation and jacket. In environments such as theatres, schools, hospitals, shopping centres and other public buildings, building codes and project specifications increasingly require or prefer LSZH materials because they emit very low smoke and virtually no halogenated gases if exposed to flame. The SFX cable’s CPR classification Fca indicates its flame properties as provided on the supplier datasheet — installers should check local regulations and project documentation for any required CE/UKCA markings or additional certification.
Mechanically, the cable’s construction and jacket thickness are chosen to withstand normal pulling and installation forces encountered on commercial projects while maintaining flexibility for routing through ducts and behind panels. The temperature rating of −40 °C to +70 °C ensures suitability across a wide range of indoor and semi‑protected environments.
Use cases and scenarios where this cable excels
- Commercial AV installations:Conference centres, theatres, lecture halls and houses of worship often require multi‑core speaker runs and LSZH materials to meet safety expectations. This cable supports those needs while simplifying wiring with four cores in a single run.
- Bi‑amping and multi‑amp systems:When a system uses separate amps for different frequency bands or multiple drivers, the four cores let you carry signals separately without needing multiple separate cables, reducing clutter and installation time.
- Distributed audio systems:Shopping centres, airports and hospitality environments benefit from a single reel of 4‑core cable that can feed multiple speakers or zones while maintaining clear polarity and consistent resistance characteristics.
- Temporary events and touring setups:For events where safety and quick deployment matter, the cable’s OFC conductors and robust LSZH jacket make it a reliable choice for public‑facing spaces.
- Retrofits and concealed installations:The pink LSZH sheath can aid identification in conduit bundles and back‑of‑rack installs, and the reduced toxic emissions of LSZH improve safety where cables may be concealed within ceilings or wall cavities.
Comparisons with similar products on the market
When selecting speaker cable, installers and specifiers commonly weigh conductor material, core count, insulation type and gauge. The SFX 4‑Core LSZH sits in a category focused on safety and installation flexibility. Here are the typical alternatives and how the SFX cable compares:
PVC cables are widespread and usually cheaper, but they give off thicker smoke and potentially corrosive halogen gases when burned. For public buildings or enclosed spaces where occupant safety and smoke toxicity are a concern, LSZH is the safer choice. The trade‑off is a modest increase in cost, which the SFX product reflects in its professional specification.
Standard 2‑core speaker cable is often adequate for basic stereo runs, but 4‑core cable provides greater flexibility for multi‑speaker and bi‑amp configurations without the need to run multiple separate cables. If your project requires separate positive/negative feeds for different drivers or additional signal paths, a 4‑core solution like the SFX reel saves time and reduces bulk.
OFC offers slightly better conductivity and is a common choice for professional audio because it reduces losses and preserves clarity, particularly over longer runs. Tinned copper adds corrosion resistance for marine or high‑humidity applications, but for typical indoor AV installs, OFC offers an excellent balance of performance and cost.
The SFX cable’s 16 AWG equivalent conductor is appropriate for many commercial speaker installations. For very long runs or high‑power loudspeakers, larger gauges (12–14 AWG) can reduce voltage drop and maintain bass performance. Conversely, for short distances or low‑power speakers, 16 AWG is often sufficient. Choose gauge based on run length, power handling and acceptable impedance.
Installation guidance and compliance notes
Installations should be performed by competent personnel following local regulations such as BS 7671 where applicable. Important guidance includes ensuring correct polarity, secure terminations, and avoiding bundling speaker cable with mains power runs unless project specifications explicitly permit it. The SFX datasheet provides CPR classification (Fca) but does not explicitly state CE/UKCA marking on the supplied information; check project documentation for any additional certification requirements.
Note that this product is intended for audio/speaker wiring. It is not primary mains wiring unless the project specification allows its use for that purpose. Verify rated voltage and environmental constraints during design and installation.
Customer feedback and typical user experiences
While no formal customer reviews are reproduced here, professional installers and AV integrators typically highlight several consistent strengths when choosing a cable like the SFX 4‑Core LSZH:
- Ease of installation due to flexible multi‑strand conductors and colour‑coded cores.
- Peace of mind in public spaces from LSZH construction and low smoke emission characteristics.
- Good value for professional installs where a single multi‑core reel reduces labour and material handling versus multiple separate runs.
Specifiers also report that the pink RAL 3015 sheath can make identification and inventory management easier on complex projects where multiple cable types are in use. If you require formal customer testimonials, request case studies or contact installers who have used the product for venue installs to obtain project‑specific feedback.
Conclusion: why the SFX 4‑Core LSZH Speaker Cable is a strong choice
For AV professionals and specifiers tasked with delivering reliable audio performance in public or enclosed spaces, the SFX 4‑Core LSZH Speaker Cable offers a compelling mix of safety, flexibility and electrical performance. The OFC multi‑strand conductors provide low resistance and dependable signal delivery, while the four colour‑coded cores simplify wiring for multi‑speaker and bi‑amp systems. The LSZH jacket addresses modern safety expectations in public buildings by limiting smoke and toxic emissions, and the CPR Fca information on the datasheet helps with compliance planning.
Pricewise, the product is positioned for professional use: the suggested price reflects the LSZH construction and OFC conductors compared with commodity PVC cable, while the 100 m reel format makes it economical for site work. Whether you are specifying cable for a theatre, conference facility, school or complex distributed audio installation, the SFX 4‑Core LSZH Speaker Cable is engineered to ease installation, reduce risk and deliver consistent audio performance.
Datasheet: https://cdn.dynamictech.uk/uploads/datasheets/sfxspk-pro-4c-lszh-pnk-100datasheet.pdf
