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Rockford Fosgate Distribution Block (RFD1)

Distribution Block with One 1/0 AWG Input & Two 1/0 AWG Outputs

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Arrives by Friday, Jan. 20 to zip 20147

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Product Features:

  • (1) 1/0 AWG or 4 AWG to (2) 1/0 AWG or 4 AWG Distribution Block
  • Includes 1/0 AWG to 4 Gauge Reducer Adapter
  • Platinum finish
  • Custom tooled solid brass
  • Flexible for use with multiple wire sizes
  • HPP plating for superior corrosion resistance
  • Authorized Internet Dealer
  • 90 Day Sonic Electronix Warranty


Second Depth
The second depth is used only when the box is slanted or angled. This value is the top measurement and it is measured in inches.
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
The height of the item, measured from top to bottom, in inches.
The width of the item from left to right (side-to-side) measured in inches.
Color of handle.

Warranty and Return Policy

Parts Warranty Duration
90 days
Labor Warranty Duration
90 days
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

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Browse 4 questions and 13 answers
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Why did you choose this?
Sonic Electronix Store
right size power block for what im using
roy m on Dec 25, 2014
I chose this item because I trust rockford fosgate and their products more than anyone else right now. I also needed a block that can have 1/0 input with two outputs and no fuses. Thank you for the great price, I cant wait to hook it up!
Michael B on Aug 27, 2014
Will adapt 0/1 to 4ga in order for my capacitor to be connected to both my speaker and sub amp
Travis S on Sep 1, 2014
will this hold 0/1 auge on one side and 2 8 gauge wires on the other?
A shopper on Dec 15, 2014
Best Answer: yes you can. theirs a ring inside that needs to come out to run 0/1 awg when the ring is in the largest awg will be 4 and it can run down to a 8awg. my personal opinion run 0/1awg in and 4awg out that way any future advancements or upgrades made to your system wont require more wire to be ran. also you will need a allen wrench 3/16" in size
Reply · Report · troy s on Dec 15, 2014
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I have o gauge coming from battery can I use this block to have a 0 gauge output and a 4 gauge just want to make sure it's safe I remember I read somewhere that running 0 gauge out puts is bad?
pollo on Apr 20, 2016
Best Answer: Not exactly sure what you are trying to do. This distribution block splits the input into two outputs. Wire gauge and thickness is all about the amount of current you are running through the wire (AMPS). If you have 0 gauge wire running from the battery to the input of the distribution block, you should contact the manufacturer of the wire you have and ask what the maximum current your wire can handle. Keep in mind this varies based on the length of the wire and the composition of the wire (CCA vs OFC). Pretend that your 0 gauge wire coming from the battery can handle 200 amps on a 20 foot run to your trunk. Then your two output wires cannot have a current draw that exceeds the maximum amperage that your input wire can carry.

Also, always, always, always use an inline fuse with the rating of how many amps your wire can handle on the specific run within around 12-18 inches of the battery so that in the case there is an electrical short, or you are drawing more current than your wire can handle, the fuse blows instead of your wire overheating and causing a fire.

Also, another note, I have this distribution block, and it says that it can take 0 gauge wire, but they must be referring to some very thin 0 gauge. Because I have Sky High Car Audio 4 gauge wire, and this barely fit into the holes.

Hope this answers your question.
Reply (1) · Report · Zachary M on Apr 21, 2016
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what is the current rating of this splitter?
A shopper on May 2, 2016
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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Rockford Fosgate Distribution Block (RFD1)