SCP 16/4OFCTC-HD-WT-D — ProSeries 4-conductor tinned copper indoor/outdoor speaker cable
The SCP 16/4OFCTC-HD-WT-D is a ProSeries tinned copper indoor/outdoor speaker cable designed for professional audio installations in commercial, residential, and home theater environments. The four-conductor, 16 AWG configuration supports bi-amp or dual-zone speaker wiring from a single cable run, while the tinned copper conductors provide superior corrosion resistance for exposed outdoor and coastal environments. Approved for in-wall riser (UL CMR) and outdoor runs, and rated to the European CPR EuroClass Dca standard, this cable suits permanent and semi-permanent installations where both compliance and long-term performance are critical.
Tinned Copper for Long-Term Outdoor Reliability
The conductors in this cable are oxygen-free copper with a full tin coating applied to each strand. Bare OFC is excellent indoors, but in outdoor, coastal, or high-humidity settings the copper surface oxidises over time, increasing contact resistance and degrading audio quality — a failure that is often slow and hard to diagnose. The tin layer acts as a barrier, preventing oxidation at the conductor surface and keeping electrical characteristics stable for the life of the installation. This is particularly important in permanent outdoor speaker runs where replacing cable means opening walls or lifting conduit. End users in coastal properties, outdoor entertainment areas, or humid climates get consistent audio performance year after year without the corrosion-related signal degradation that can affect standard OFC products.
4-Conductor Configuration for Flexible Speaker Wiring
Running four conductors in one cable jacket gives installers a practical advantage over 2-conductor cable in multi-speaker and bi-amp scenarios. A single 16/4 run from amplifier to speaker location can simultaneously carry two independent channels — useful for bi-wiring passive speakers with separated high- and low-frequency terminals, for A/B speaker switching, or for serving two speakers in a stereo zone from one pull. This reduces the number of cable runs, simplifies conduit fill calculations, and cuts installation time significantly on larger projects. For the end user, it also means a neater install with fewer visible cable paths and easier future modifications.
Dual-Market Compliance: UL CMR + EN50575 Dca
This cable carries both North American (UL CMR / NEC CL3R/CL2R) and European (EN50575 EuroClass Dca-s3,d2,a3) fire ratings, making it one of the few products in its category that can be specified on both sides of the Atlantic without sourcing a separate SKU. UL CMR permits in-wall riser installation without conduit in North America. The Dca EuroClass rating satisfies CPR requirements in EU and UK projects where a Declaration of Performance is mandatory for cables permanently installed in construction works. Specifiers and integrators working on international hotel chains, pan-European commercial roll-outs, or cross-market projects can standardise on a single product, reducing procurement complexity and eliminating the risk of shipping the wrong cable to site.
UV-Resistant HD PVC Jacket for Exposed Outdoor Runs
The Heavy Duty PVC outer jacket is formulated with UV stabilisers that protect the cable from sunlight-induced brittleness and cracking. Standard PVC jackets degrade under prolonged UV exposure, eventually cracking and exposing conductors to moisture ingress — a common cause of intermittent faults in outdoor speaker systems. This jacket maintains flexibility and mechanical integrity for the rated temperature range of -20°C to 75°C operating, making it suitable for roof terraces, garden installations, under-eave speaker mounts, and other above-ground outdoor routes where the cable sees direct sunlight. No additional protective conduit is required for UV protection, simplifying the installation and reducing material cost.
Reelex II Tangle-Free Box Packaging
The cable ships in SCP's Reelex II box, a figure-eight coiling system that dispenses cable from the centre of the spool without rotation. Unlike conventional drum or coiled packaging, Reelex boxes eliminate tangling, kinking, and the need to hold or spin the spool during pulls. On a busy installation site, this reduces two-person pulling to a one-person task, speeds up individual runs noticeably, and prevents the cable damage that kinking can introduce into fine-stranded conductors. The compact box also stores flat and is easy to transport between floors and rooms — a small operational detail that adds up to real time savings across a multi-room or commercial project.
