Rockford Fosgate RFD1 1/0 AWG Distribution Block

1/0 AWG Distribution Block 1 Input, 2 Outputs, Accepts 1/0 AWG or 4 AWG. Custom Tooled Solid Brass with HPP Platinum Finish.

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Product Overview

The Rockford Fosgate RFD1 is a 1/0 AWG distribution block with one input and two outputs splitting one main power or ground cable into two separate runs. Both the input and each output accept 1/0 AWG or 4 AWG wire, providing wiring flexibility for systems where the main run is 1/0 AWG and secondary runs are either 1/0 AWG or the smaller 4 AWG gauge. Constructed from custom-tooled solid brass with HPP (High Performance Plating) platinum finish for superior corrosion resistance.

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Key Specifications

• Part number: RFD1
• Configuration: 1 input / 2 outputs
• Input wire size: 1/0 AWG or 4 AWG ✓
• Output wire sizes: 1/0 AWG or 4 AWG per output ✓
• Construction: Custom tooled solid brass ✓
• Plating: HPP (High Performance Plating) — platinum finish ✓
• Corrosion resistance: Superior (HPP confirmed) ✓
• Terminal type: Not specified — confirm with Rockford Fosgate (set screw or bolt)
• Mounting: Not specified — confirm with Rockford Fosgate
• Maximum current rating: Not specified — confirm with Rockford Fosgate
• Dimensions: Not specified — confirm with Rockford Fosgate
• Weight: Not specified

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Features & Benefits

• 1 In / 2 Out Configuration — Splits one main power or ground cable into two independent output runs — suitable for powering two amplifiers from a single main cable, or routing power to an amplifier and a secondary distribution point.
• 1/0 AWG or 4 AWG Input and Output Flexibility — Both the input and each output accept either 1/0 AWG or 4 AWG wire, allowing the block to be used across different system configurations: 1/0 AWG main to two 1/0 AWG outputs, 1/0 AWG main to two 4 AWG outputs, or mixed configurations.
• Custom Tooled Solid Brass — The block body is machined from solid brass rather than cast or stamped — providing precise dimensional tolerances, high current capacity, and better thermal performance than lower-grade materials. Solid brass construction also provides the mechanical strength to hold high-torque terminal screws securely.
• HPP Platinum Plating — Superior Corrosion Resistance — HPP plating protects the brass body against oxidation and corrosion in vehicle environments, maintaining low contact resistance at the conductor interface over time.

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Technical Specs

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Compatible With / Goes Well With

Suitable for:

• Splitting a 1/0 AWG main power run to two amplifiers
• Power distribution in multi-amplifier systems using 1/0 AWG or 4 AWG secondary runs
• Ground distribution from a single chassis ground point

Pairs well with:

• Rockford Fosgate RFW1R-51 / RFW1B-51 (1/0 AWG wire for main run)
• Rockford Fosgate RFT4 / RFTS4 (4 AWG terminals for output runs)
• Rockford Fosgate amplifiers requiring distributed power supply

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Frequently Asked Questions

What is a distribution block and why is it used?

A distribution block connects one main power or ground cable to multiple output cables — allowing a single 1/0 AWG battery-to-boot run to supply two or more amplifiers independently. Without a distribution block, each amplifier would require its own full-length power run from the battery.

Can the RFD1 mix 1/0 AWG and 4 AWG wires?

Yes — both input and output ports accept either 1/0 AWG or 4 AWG, providing flexibility to mix gauges. For example, a 1/0 AWG main input can be distributed to two 4 AWG outputs for a pair of smaller amplifiers, or to one 1/0 AWG and one 4 AWG output.

What is the maximum current capacity?

Maximum current rating is not confirmed in the supplier data. Given solid brass construction and 1/0 AWG input capacity, the block is designed for high-current applications. Confirm the rated current from the official Rockford Fosgate RFD1 product page.

How is the RFD1 mounted?

Mounting method is not specified in the supplier data. Confirm from the official Rockford Fosgate RFD1 product page — typical distribution block mounting uses screws through the block body or a bracket.

What terminal type (set screw or bolt) does the RFD1 use?

Terminal type is not specified. Confirm from the official Rockford Fosgate RFD1 product page before purchasing.