Rockford Fosgate RFW4R 100 Foot Spool 4 AWG Frosted Red Wire
Rockford Fosgate RFW4R 4 AWG 100 Foot Frosted Red Wire Spool
For professional installers requiring bulk 4 AWG positive cable without compromise on conductor quality, the RFW4R delivers 100 feet of full-specification PC-OFC copper across 1,862 strands on a single spool.
Product Overview
The RFW4R is Rockford Fosgate's 100-foot bulk spool of 4 AWG positive insulated wire, designed for professional installers and high-volume car audio builds where pre-packaged power cable lengths are impractical. Constructed from Pure Crystal-Oxygen Free Copper (PC-OFC) across 1,862 individual strands, it meets the full AWG specification at 21.1mm² cross-sectional area, ensuring the rated gauge is delivered in copper rather than compensated with thicker insulation. Conforming to CTA-2015 industry standards, the RFW4R guarantees the exact copper content required for the indicated gauge size across every metre of the spool, eliminating the undersized conductors common in non-compliant bulk cable products. The frosted outer jacket provides maximum flexibility for routing through tight installation paths despite the heavier gauge construction, while the BC-5W2 marine specification confirms suitability for both automotive and marine applications. 1-year warranty.
Features & Benefits
Pure Crystal-Oxygen Free Copper (PC-OFC): The conductor is made from oxygen-free copper with a pure crystal structure, minimising grain boundaries within the conductor that increase resistance. PC-OFC delivers lower resistance and better current-carrying performance than standard copper cable of equivalent gauge, maintaining consistent performance across the full 100-foot spool length.
Full AWG Specification at 21.1mm²: The RFW4R meets the full 4 AWG specification at 21.1mm² of copper cross-sectional area. CTA-2015 compliance confirms that the rated gauge is achieved through conductor content rather than inflated insulation thickness throughout the entire spool.
1,862-Strand Construction: The conductor is built from 1,862 individual copper strands, providing exceptional flexibility for a 4 AWG cable. This very high strand count makes the cable significantly easier to route through tight spaces, firewalls, and chassis runs than equivalent-gauge cables with fewer, thicker strands, while also improving fatigue resistance under sustained vibration.
100-Foot Bulk Spool: The 100-foot spool format provides sufficient cable for multiple vehicle power installations or a single complex build from a single purchase, eliminating the need to source multiple pre-packaged lengths and reducing per-metre cost compared to pre-packaged options.
Frosted Outer Jacket for Maximum Flexibility: The frosted PVC outer jacket is formulated for maximum flexibility, allowing the cable to be routed through firewalls and tight installation paths without kinking or cracking in cold conditions, even at the heavier 4 AWG gauge.
CTA-2015 Compliant: Rockford Fosgate cables conform to the CTA-2015 industry standard, which specifies the exact amount of copper required to qualify for a stated wire gauge. This standard protects against manufacturers substituting thicker insulation for copper conductor content.
BC-5W2 Marine Specification: The BC-5W2 rating confirms suitability for use in marine environments including boats and non-commercial watercraft, in addition to standard automotive applications.
Technical Specs
| Specification | Detail |
|---|---|
| SKU | RFW4R |
| Conductor Material | Pure Crystal-Oxygen Free Copper (PC-OFC) |
| AWG Rating | 4 AWG |
| Cross-Sectional Area | 21.1mm² |
| Number of Strands | 1,862 |
| Conductors | 1 |
| Application | Positive (Power) |
| Length | 100 feet |
| Format | Bulk Spool |
| Jacket Colour | Frosted Red |
| Jacket Type | Frosted outer jacket |
| Compliance | CTA-2015, BC-5W2 Marine Specification |
| Warranty | 1 Year |
Goes Well With
The RFW4R is the bulk positive power cable complement to Rockford Fosgate's RFW4B 4 AWG ground cable and amplifier wiring kits. Used together, the RFW4R and RFW4B provide a complete matched positive and negative cable solution for 4 AWG amplifier installations cut to exact lengths. It is well matched to amplifier installations specifying 4 AWG power runs, including the R2-300X4, R2-200X2, R2-250X1, and R2-1200X1, all of which specify 4 AWG as their recommended power wire gauge. The 100-foot spool format suits professional installers working across multiple vehicles or complex builds where power cable runs to the battery need to be cut to precise lengths. For complete amplifier power protection, Rockford Fosgate's circuit breakers in the RFCB range are the recommended complement alongside this cable.
Frequently Asked Questions
What is the difference between the RFW4R and the RFW4B?
The RFW4R and RFW4B are identical in specification, using the same 4 AWG PC-OFC 1,862-strand conductor construction with a frosted jacket and CTA-2015 and BC-5W2 compliance. The only difference is application and jacket colour: the RFW4R is a positive (power) cable with a frosted red jacket, while the RFW4B is a negative (ground) cable with a frosted black jacket. The colour coding follows the standard automotive wiring convention of red for positive and black for negative.
What is PC-OFC and why does it matter for a power cable?
PC-OFC stands for Pure Crystal-Oxygen Free Copper. Standard copper wire contains oxygen and grain boundaries within the conductor's crystal structure that increase resistance. In a power cable, resistance in the positive run reduces the voltage available at the amplifier terminals under load, limiting maximum output and causing voltage sag during bass transients. PC-OFC's lower resistance ensures the full supply voltage is delivered to the amplifier as efficiently as possible across the entire run from the battery.
What does CTA-2015 compliance mean for a bulk power cable spool?
CTA-2015 is an industry standard specifying the exact amount of copper conductor required to legitimately claim a specific wire gauge. Some manufacturers reduce copper content while increasing insulation thickness to reach the nominal diameter of a given gauge, resulting in cable that underperforms its stated rating. CTA-2015 compliance on the RFW4R confirms the full 21.1mm² of copper cross-section is present throughout every metre of the 100-foot spool, not just in sample lengths.
Why does the RFW4R have 1,862 strands?
A larger AWG gauge requires more total copper cross-section. To achieve the 21.1mm² required for 4 AWG while maintaining maximum flexibility, Rockford Fosgate uses 1,862 individual fine-gauge strands rather than fewer, thicker strands. The very high strand count distributes the copper content across more, thinner wires, which allows the completed cable to flex more easily despite its heavier gauge rating. This is particularly beneficial during installation when routing the cable through firewalls and along chassis runs between the battery and the amplifier location.
What does the BC-5W2 marine specification mean for automotive use?
BC-5W2 is a marine-grade wiring specification indicating the cable is rated for use in boat and non-commercial marine environments where exposure to moisture, salt air, and vibration exceeds standard automotive conditions. For car audio use, BC-5W2 compliance means the cable is built to a higher standard of moisture and corrosion resistance than basic automotive power wire, making it suitable for vehicles exposed to wet conditions and for marine audio installations alongside standard car audio applications.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Rockford Fosgate RFW4R 4 AWG 100 Foot Frosted Red Wire Spool
For professional installers requiring bulk 4 AWG positive cable without compromise on conductor quality, the RFW4R delivers 100 feet of full-specification PC-OFC copper across 1,862 strands on a single spool.
Product Overview
The RFW4R is Rockford Fosgate's 100-foot bulk spool of 4 AWG positive insulated wire, designed for professional installers and high-volume car audio builds where pre-packaged power cable lengths are impractical. Constructed from Pure Crystal-Oxygen Free Copper (PC-OFC) across 1,862 individual strands, it meets the full AWG specification at 21.1mm² cross-sectional area, ensuring the rated gauge is delivered in copper rather than compensated with thicker insulation. Conforming to CTA-2015 industry standards, the RFW4R guarantees the exact copper content required for the indicated gauge size across every metre of the spool, eliminating the undersized conductors common in non-compliant bulk cable products. The frosted outer jacket provides maximum flexibility for routing through tight installation paths despite the heavier gauge construction, while the BC-5W2 marine specification confirms suitability for both automotive and marine applications. 1-year warranty.
Features & Benefits
Pure Crystal-Oxygen Free Copper (PC-OFC): The conductor is made from oxygen-free copper with a pure crystal structure, minimising grain boundaries within the conductor that increase resistance. PC-OFC delivers lower resistance and better current-carrying performance than standard copper cable of equivalent gauge, maintaining consistent performance across the full 100-foot spool length.
Full AWG Specification at 21.1mm²: The RFW4R meets the full 4 AWG specification at 21.1mm² of copper cross-sectional area. CTA-2015 compliance confirms that the rated gauge is achieved through conductor content rather than inflated insulation thickness throughout the entire spool.
1,862-Strand Construction: The conductor is built from 1,862 individual copper strands, providing exceptional flexibility for a 4 AWG cable. This very high strand count makes the cable significantly easier to route through tight spaces, firewalls, and chassis runs than equivalent-gauge cables with fewer, thicker strands, while also improving fatigue resistance under sustained vibration.
100-Foot Bulk Spool: The 100-foot spool format provides sufficient cable for multiple vehicle power installations or a single complex build from a single purchase, eliminating the need to source multiple pre-packaged lengths and reducing per-metre cost compared to pre-packaged options.
Frosted Outer Jacket for Maximum Flexibility: The frosted PVC outer jacket is formulated for maximum flexibility, allowing the cable to be routed through firewalls and tight installation paths without kinking or cracking in cold conditions, even at the heavier 4 AWG gauge.
CTA-2015 Compliant: Rockford Fosgate cables conform to the CTA-2015 industry standard, which specifies the exact amount of copper required to qualify for a stated wire gauge. This standard protects against manufacturers substituting thicker insulation for copper conductor content.
BC-5W2 Marine Specification: The BC-5W2 rating confirms suitability for use in marine environments including boats and non-commercial watercraft, in addition to standard automotive applications.
Technical Specs
| Specification | Detail |
|---|---|
| SKU | RFW4R |
| Conductor Material | Pure Crystal-Oxygen Free Copper (PC-OFC) |
| AWG Rating | 4 AWG |
| Cross-Sectional Area | 21.1mm² |
| Number of Strands | 1,862 |
| Conductors | 1 |
| Application | Positive (Power) |
| Length | 100 feet |
| Format | Bulk Spool |
| Jacket Colour | Frosted Red |
| Jacket Type | Frosted outer jacket |
| Compliance | CTA-2015, BC-5W2 Marine Specification |
| Warranty | 1 Year |
Goes Well With
The RFW4R is the bulk positive power cable complement to Rockford Fosgate's RFW4B 4 AWG ground cable and amplifier wiring kits. Used together, the RFW4R and RFW4B provide a complete matched positive and negative cable solution for 4 AWG amplifier installations cut to exact lengths. It is well matched to amplifier installations specifying 4 AWG power runs, including the R2-300X4, R2-200X2, R2-250X1, and R2-1200X1, all of which specify 4 AWG as their recommended power wire gauge. The 100-foot spool format suits professional installers working across multiple vehicles or complex builds where power cable runs to the battery need to be cut to precise lengths. For complete amplifier power protection, Rockford Fosgate's circuit breakers in the RFCB range are the recommended complement alongside this cable.
Frequently Asked Questions
What is the difference between the RFW4R and the RFW4B?
The RFW4R and RFW4B are identical in specification, using the same 4 AWG PC-OFC 1,862-strand conductor construction with a frosted jacket and CTA-2015 and BC-5W2 compliance. The only difference is application and jacket colour: the RFW4R is a positive (power) cable with a frosted red jacket, while the RFW4B is a negative (ground) cable with a frosted black jacket. The colour coding follows the standard automotive wiring convention of red for positive and black for negative.
What is PC-OFC and why does it matter for a power cable?
PC-OFC stands for Pure Crystal-Oxygen Free Copper. Standard copper wire contains oxygen and grain boundaries within the conductor's crystal structure that increase resistance. In a power cable, resistance in the positive run reduces the voltage available at the amplifier terminals under load, limiting maximum output and causing voltage sag during bass transients. PC-OFC's lower resistance ensures the full supply voltage is delivered to the amplifier as efficiently as possible across the entire run from the battery.
What does CTA-2015 compliance mean for a bulk power cable spool?
CTA-2015 is an industry standard specifying the exact amount of copper conductor required to legitimately claim a specific wire gauge. Some manufacturers reduce copper content while increasing insulation thickness to reach the nominal diameter of a given gauge, resulting in cable that underperforms its stated rating. CTA-2015 compliance on the RFW4R confirms the full 21.1mm² of copper cross-section is present throughout every metre of the 100-foot spool, not just in sample lengths.
Why does the RFW4R have 1,862 strands?
A larger AWG gauge requires more total copper cross-section. To achieve the 21.1mm² required for 4 AWG while maintaining maximum flexibility, Rockford Fosgate uses 1,862 individual fine-gauge strands rather than fewer, thicker strands. The very high strand count distributes the copper content across more, thinner wires, which allows the completed cable to flex more easily despite its heavier gauge rating. This is particularly beneficial during installation when routing the cable through firewalls and along chassis runs between the battery and the amplifier location.
What does the BC-5W2 marine specification mean for automotive use?
BC-5W2 is a marine-grade wiring specification indicating the cable is rated for use in boat and non-commercial marine environments where exposure to moisture, salt air, and vibration exceeds standard automotive conditions. For car audio use, BC-5W2 compliance means the cable is built to a higher standard of moisture and corrosion resistance than basic automotive power wire, making it suitable for vehicles exposed to wet conditions and for marine audio installations alongside standard car audio applications.
