Description
4 AWG PC-OFC Amplifier Installation Kit 17ft Power Wire, 3ft Ground Wire, Maxi Fuse Holder and 100A Fuse. Full AWG Specification.
The Rockford Fosgate RFK4 is a 4 AWG amplifier power installation kit the heavier-gauge counterpart to the RFK8, suited to higher-powered amplifier systems requiring 4 AWG wiring. Full AWG specification, 100% PC-OFC at 21.1mm² with 1,862 strands. Includes a Maxi-format (not AGU) inline fuse holder and a 100A fuse consistent with the higher current capacity of a 4 AWG system.
Kit Contents
| Item |
Specification |
| Power wire |
17 feet, 4 AWG PC-OFC (21.1mm², 1,862 strands) ✓ |
| Ground wire |
3 feet, 4 AWG PC-OFC ✓ |
| Remote wire |
Not stated |
| Maxi fuse holder |
Included ✓ |
| Fuse |
100A ✓ (see ambiguity note) |
| Termination hardware |
Included ✓ (type TBC) |
Key Specifications
| Specification |
Detail |
| Part Number |
RFK4 |
| Wire Gauge |
4 AWG ✓ |
| Cross-Section |
21.1mm² ✓ |
| Strand Count |
1,862 ✓ |
| Conductor |
100% PC-OFC ✓ |
| AWG Compliance |
Full AWG spec ✓ |
| Power Wire |
17 feet ✓ |
| Ground Wire |
3 feet ✓ |
| Remote Wire |
Not confirmed |
| Fuse Holder |
Maxi inline ✓ |
| Fuse Rating |
100A ✓ |
| RCA Cable |
Not included |
| Warranty |
Not specified |
How It Differs From RFK8
| Feature |
RFK8 |
RFK4 |
| Wire Gauge |
8 AWG (8.36mm²) |
4 AWG (21.1mm²) ✓ |
| Strand Count |
735 |
1,862 ✓ |
| Fuse Holder |
AGU |
Maxi ✓ |
| Fuse Rating |
40A |
100A ✓ |
| Remote Wire |
20ft confirmed |
Not confirmed |
| RCA Cable |
Not included |
Not included |
FAQs
What amplifier power is the RFK4 suited to? 4 AWG wiring is generally appropriate for amplifiers rated approximately 500–1,000W RMS depending on cable run length. For systems above this range requiring 1/0 AWG, the Rockford Fosgate RFW1R-51 wire and RFD1 distribution block provide the appropriate gauge.
Why does the RFK4 use a Maxi fuse holder instead of AGU? The Maxi format is a higher-current fuse type suited to 4 AWG main runs at 100A — consistent with the higher current capacity of 4 AWG wiring. The AGU fuse in the RFK8 is rated at 40A, appropriate for 8 AWG.
Is remote wire included? Not confirmed in the supplier description — unlike the RFK8 which explicitly states 20ft of remote wire. Confirm from the official Rockford Fosgate RFK4 product page before purchasing.
Is an RCA cable included? No — same as the RFK8. A separate RCA signal cable from the RFI or RFIT range is required.
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