Rockford Fosgate RFW4R 100-Foot 4 AWG Red Power Wire

The Rockford Fosgate RFW4R is a 100-foot bulk spool of 4 AWG power wire for custom car audio and marine-audio electrical installations. It provides installers with a single continuous supply of cable that can be cut to the lengths required for an individual build or multiple projects. The frosted red jacket helps identify the cable in a power-wiring layout.

This cable is intended for systems that call for full-spec 4 AWG power or ground wiring, with the red finish commonly used to distinguish positive-side runs. Its bulk-spool format is useful when pre-cut cable lengths do not suit the vehicle, amplifier location, or routing path. Select the wire size according to the connected equipment manufacturer's wiring recommendation.

Rather than affecting the character of the audio signal itself, power cable supports system performance by carrying electrical power to compatible equipment. The RFW4R uses Pure Crystal-Oxygen Free Copper (PC-OFC) conductors and meets or exceeds American Wire Gauge requirements. Its 21.1 mm² conductor area and 1,862-strand construction deliver the specified 4 AWG format in a flexible cable.

A frosted outer jacket is designed for maximum flexibility, helping with routing through vehicle interiors, around trim, and along planned cable paths. The fine-strand conductor construction also helps the cable bend more readily than a similarly sized solid conductor. The cable is listed as compliant with CEA-2015 and BC-5W2 marine specifications.

Use the RFW4R as part of a properly planned electrical upgrade, alongside correctly sized fusing, terminals, protective loom, and a matched ground path where applicable. The 100-foot spool is especially practical for professional installation work, multi-vehicle projects, or builds with nonstandard cable runs. It is a wiring component rather than a complete amplifier wiring kit.

Key Features

• 100-Foot Bulk Spool: Provides continuous cable that can be cut for custom installation lengths.
• Full-Spec 4 AWG: Meets or exceeds stated American Wire Gauge requirements.
• PC-OFC Copper: Uses Pure Crystal-Oxygen Free Copper conductors.
• 21.1 mm² Conductor Area: Delivers the conductor cross-section associated with 4 AWG cable.
• 1,862-Strand Construction: Uses many fine copper strands to support flexibility.
• Frosted Red Jacket: Helps identify the cable and supports flexible routing.

Design & Installation

The RFW4R combines a stranded PC-OFC copper conductor with a frosted red outer jacket. Its 1,862 individual strands, approximately 10 mm outside diameter, and flexible jacket construction are intended to make a heavy-gauge cable easier to handle during installation. The cable is supplied on a bulk spool rather than with preinstalled terminals or a fuse holder.

Plan the route before cutting cable, keep power wiring protected from abrasion, and use properly sized terminals and circuit protection appropriate for the connected equipment. Confirm that 4 AWG is the wire gauge specified by the amplifier or other device manufacturer, especially when cable-run length and total current demand are factors. For a matched negative-side run, use a suitable 4 AWG ground cable and follow vehicle or marine installation practices.