Rockford Fosgate Prime R1-2X12

Sealed enclosure with two 12" Prime subwoofers

Item #: 575R12X12

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Maximum bass

Rockford Fosgate's Prime Series loaded sub enclosures fill your car with bass without emptying your bank account. These rugged sealed boxes feature 5/8"-thick medium-density fiberboard construction covered with a protective layer of heavy-duty black carpeting. And you can count on Rockford Fosgate to create an enclosure that'll draw every ounce of bass out of its sub.

Handles up to 400 watts

The R1-2X12 sealed loaded enclosure comes with two Prime R1S4-12 12" subs, wired for 2-ohm total impedance. Together, these speakers handle up to 400 watts RMS, featuring fiber-reinforced paper-pulp cones and compressed foam surrounds that deliver some impressive bass.

Product Highlights:

  • sealed enclosure with two 12" Prime subwoofers
  • 5/8" medium density fiberboard construction covered with black carpet
  • 2-ohm total impedance
  • power handling: 400 watts RMS (800 watts peak power)
  • frequency response: 25-250 Hz
  • sensitivity: 90 dB
  • 37-3/4"W x 14-3/8"H x 12-1/8"D
  • warranty: 1 year (woofer only)
  • Our 60-day money-back guarantee

Enclosed Subwoofers 101

An enclosed subwoofer is a box with a subwoofer already installed. The advantage to buying an enclosed sub is that the manufacturer made the sub, then designed and built the box as a perfect match, so you'll get the best possible performance. Every enclosed sub has a maximum RMS power handling rating, so pair it with an amp with a similar RMS power rating to get the best performance.

Rockford Fosgate Prime R1-2X12 Reviews

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Rockford Fosgate r1 sub

Written By mike88688, Pompano beach, FL on Sunday, July 19, 2015

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Not Rated

Great setup when used with Rockford amp and speakers. Wished I went with two 10 inch subs instead for a cleaner hit

Pros: Very powerful subs with amazing quality

Cons: Two 12 inches is a little to much for my car. Two tens would have sounded more crisp

Hands-on research

What's in the box?

Download owner's manual

  • Sealed enclosure loaded with two 12" woofers
  • Manual

Product Research


Enclosure: The Rockford Fosgate Prime R1-2X12 is a sealed enclosure constructed of 5/8" MDF (Medium Density Fiberboard). The enclosure is covered with high density black carpeting and features high current compression terminals on the left side (when facing the woofers). The terminals will accommodate up to 12-gauge speaker wire and present a 2Ω load to your amplifier.


  • Width: 34-1/2"
  • Height: 14-1/4"
  • Depth (base): 12-1/2" (13-1/4" including the subwoofer)
  • Depth (top): 7-1/8" (7-7/8" including the subwoofer)

Woofer: The R1-2X12 is loaded with two Rockford Fosgate Prime R1S4-12 subwoofers. Each R1S4-12 is a 12", 4Ω, single voice coil subwoofer with a fiber reinforced painted paper-pulp cone and compressed foam surround. The two subs are wired in parallel inside the box, to present a 2Ω load.

CEA-2031 Compliant: Power handling on the R1S4-12 subwoofers conforms to CEA-2031 industry standards. This means the subwoofer has the capacity to handle its rated power under continuous demand, not instantaneous power handling, that over time, can damage voice coils.

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