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Rockford Fosgate R2D4-12

250W 12" Prime Stage 2 Dual 4 ohm Subwoofer

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List price $79.95

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$59.99

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Rockford Fosgate R2D4-12

250W 12" Prime Stage 2 Dual 4 ohm Subwoofer

$59.99

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25 ft. of Streetwires 12 Gauge Speaker Cable

You'll need speaker wire to hook up that new subwoofer!

$44.95

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20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

$59.99

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12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

$6.99

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Bundled Savings with this Product

Save 25% on a Sealed Enclosure with Your Subwoofer Purchase!

Save 25% when you add a Belva MDFS1215 Sealed Subwoofer Enclosure to your Subwoofer purchase. Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

10.00

33744

1226

Rockford Fosgate R2D4-12

$59.99

+

25% OFF

1.5 Cu Ft - Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS1215)

$39.99

Special Price $29.99 ($39.99 if purchased separately)

1.5 Cu Ft - Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS1215)

• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals
• 1.5 Cubic ft Box Volume

Save 25% on a Vented Enclosure with Your Subwoofer Purchase!

Save 25% when you add a Belva 1SV12B Vented Subwoofer Enclosure to your Subwoofer purchase. Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

12.50

33744

453

Rockford Fosgate R2D4-12

$59.99

+

25% OFF

Single 12" Vented MDF Subwoofer Enclosure (Belva 1SV12B)

$49.99

Special Price $37.49 ($49.99 if purchased separately)

Single 12" Vented MDF Subwoofer Enclosure (Belva 1SV12B)

• Single 12" Vented MDF Enclosure
• Holds one 12" subwoofer
• 3/4 MDF (Medium Density Fiberboard) Construction
• Durable black carpeting
• Gold Terminals
• Internal Box Volume: 1.8 cubic ft.

15% Off a Sound Dampening Kit with Your Subwoofer Purchase!

Save 15% when you add an NVX SDTK20 Sound Dampening Trunk Kit to your Subwoofer purchase. Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

9.00

33744

1219

Rockford Fosgate R2D4-12

$59.99

+

15% OFF

NVX SDTK20

$59.99

Special Price $50.99 ($59.99 if purchased separately)

NVX SDTK20

• Eliminates Road Noise
• Quiets Vibrations
• Stops Rattles • Increases SPL
• Reduces Heat
• Simple To Install
• Easy To Form Aluminum
• Four Step Peel and Stick Installation
• Five 18" x 32" Pieces

(Offer 1 of 3)

Combined Total Price

$89.98

You Save $10.00

Rockford Fosgate Audio Store

Eliminate Entry Level and Go Straight to Prime

Prime subwoofers are ready to rock and are the perfect first step into performance audio.The Prime R2 12" subwoofers have a peak power rating of 500 watts and a continuous RMS power rating of 250 watts. This makes them an ideal subwoofer for anyone looking to add some modest low end to their car audio system. The Prime R2 drivers feature an anodized aluminum voice coil formers for extreme heat dissipation that allow the driver to perform at optimum level during long hard hitting sessions. These subwoofers are the way to go when looking for a woofer that is built with quality & performance in mind and has been designed by industry's leading car audio manufacture.

These woofers, like their Punch brethren, are built using many of the same speaker technologies that Rockford has been famous for over 30 years for and you won't break the bank buying one. Simply put, the Prime seriesof woofers are held to the same standards of quality and performance as any other Rockford woofer but delivered at an affordable price.

Rockford Fosgate Prime Stage 2 Subwoofer
 
Anodized Aluminum Voice Coil Former

Anodized Aluminum Voice Coil Former

By using an anodized aluminum voice coil former on their subwoofers, Rockford Fosgate is able to dissipate heat from the voice coil more efficiently. A hot voice coil can melt the adhesive bonds, which will lead to eventual subwoofer failure. The aluminum voice coil former acts as a heat-sink to dissipate thermal build-up on the voice coil cool during high SPL conditions.

 
CEA-2031 Rockford Fosgate Subwoofers

Conforms to CEA-2031

Rockford Fosgate has built this subwoofer to conform to the CEA-2031 loudspeaker power handling industry standards. This means that you can trust the subwoofer to have the capacity to safely handle the continuous (RMS) power rating. Having a CEA-2031 power handling is important when matching a subwoofer to an amplifier because the power ratings are accurate.

 
Rockford Fosgate Stitched Tinsel Leads

Stitched Tinsel Leads

To improve the reliability and performance by reducing fatigue and possible shorting, Rockford Fosgate has stitched the tinsel leads to the spider. The multipoint periodic stitching lead wires reduce the mass of the tinsel leads to spread the stress over a greater area. This improves the reliability and performance of the subwoofer.





 

Key Benefits

  • 12" Dual 4 ohm Prime Stage 2 Series Subwoofer
  • Power Handling:
    • Peak: 500 watts
    • RMS: 250 watts
  • Recommended power range: 200 - 300 watts RMS
  • CEA-2031 Compliant
  • Klippel Verified
  • 12 AWG compression terminals
  • Anodized aluminum voice coil former
  • Injection molded polypropylene cone
  • Tear & fatigue resistant poly-cotton spider
  • StampCast basket with integrated spider venting
  • Linear spider with embedded 16 AWG tinsel leads
  • High density compressed half-roll sealed poly-foam surround
  • Optimized motor magnetics with extended pole and bumped vented backplate
  • Fatigue resistant and reduced strain "stitched on" flexible lead wire design
  • Multi-point high-temp/high-strength neck joint bonding technique

  •  
  • Semi-flexible PVC removable protective motor cover
  • Optimized for both sealed and vented enclosures
  • All metal compression input terminal assembly
  • Heavy guage proprietary stamped steel frame
  • Mounting Depth: 5.067"
  • Cutout Diameter: 11.25"
  • Magnet Weight: 47.70 oz
  • Frequency Response: 43 - 250 Hz
  • Xmax: 6.5 mm
  • Sensitivity: 89 dB @ 1 watt / 1 meter
  • Recommended Ported Enclosure: 1.79ft³ @45.0 Hz
  • Recommended Sealed Enclosure: 1.02ft³ @51.1 Hz
  • Matching Amplifiers: (one driver)
  • Matching Amplifier: (two drivers)
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Individually

Check out the Rockford Fosgate R2D4-12 Owner's Manual

Check out the Rockford Fosgate R2D4-12 Data Sheet



Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
Prime R2 (Rockford Fosgate)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
12"
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
500 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
250 watts
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Dual
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Voice Coil Diameter
Diameter of voice coil, usually measured in inches.
2"
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
43 - 250 Hz
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
 
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
89 dB
Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
6.5 mm
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Black
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Mica Injected Polypropylene (MIPP)
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Poly-Foam
Subwoofer Grille
Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
No
Re-Cone Kit Available
Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.
No

Recommended Enclosure Specifications

Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Ported / Vented
Sealed
Optimum Sealed Box Volume
This value indicates the ideal sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.02 cubic feet
Optimum Ported Box Volume
This value indicates the ideal ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.79 cubic feet
Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
5.067"
Cutout Diameter
The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
11.25"
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

No

Electromechanical Parameters

Free-Air Resonance (Fs)
The free-air resonance frequency of the subwoofer, measured in Hz. At this frequency the weight of the moving parts is perfectly balanced with the subwoofers suspension system.
34.9 Hz
Equivalent Compliance (Vas)
This is the amount of air that has the same stiffness as the subwoofers suspension. The greater the rating, the lower the stiffness and larger recommended enclosure. It is measured in Liters.
68.8 liters
Total Speaker Q Value (Qts)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including all dimensionless losses. Essentially, a high Qts value (closer to 1.0) means the subwoofer is great for sealed enclosures and a low Qts value (closer to 0) means the woofer is great in vented enclosures. A Qts of around 0.45 means the woofer will work decently in either enclosure type.
0.60
Electrical Q Value (Qes)
The subwoofers relative damping (Q) at the resonance frequency (Fs), including electrical losses. Also called the mechanical damping of the subwoofer. The unitless measurement usually varies from 0.5 – 10.
0.66
Electrical Resistance of Voice Coil (Re)
Amount of DC resistance of the subwoofer when measured with an ohm meter. Typically, this will read less than the impedance rating of the subwoofer.
7.17 ohms
Mechanical Q Value (Qms)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including mechanical losses. Also called the mechanical damping of the subwoofer. This unitless measurement usually varies from 0.5 – 10.
7.33
Efficiency Bandwidth Product (EBP)
This number represents the trade off between having an efficient woofer and one with a wide bandwidth. To calculate this number, take the Fs and divide it by the Qes. If the number is below 50, the woofer is designed for a sealed enclosure only. If it's between 50-100 it can be used in either. Lastly, if it's greater than 100 it's designed for vented enclosures.
52.88

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
82%
4 Star
9%
3 Star
0%
2 Star
0%
1 Star
9%

Average Attribution Rating

Durability
4.3
Value
4.5
Features
4.5
Design
4.5
Usability
4.5
Doonie

Richmond, VA

Overall
Durability
Value
Features
Design
Usability
Deyz little thangs bang

July 20, 2014

Aww man these bad boys hold there own had two in my girls firebird on a 1000 watt amp and let me tell you they got down right busy they embarrassed my homeboys 3 10" kickers made my love for Rockford that much stronger make sure you properly break them in though cuz they will stink up the ride when abused lol but I fully recommend for the casual bass addition not so much for the junkies like myself

20 of 33 found this helpful

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Mario

Las Cruces, NM

Overall
Durability
Value
Features
Design
Usability
Great value!

March 15, 2012

Got it about 6 months ago. Put in my Ford Ranger and bass sound from this is just what I was looking for. I now can thump like the kids down the street. I would recommend this. Thumbs up!

19 of 32 found this helpful

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Zach

Cedar Park, Tx

Overall
Durability
Value
Features
Design
Usability
Nice budget subwoofer

May 17, 2015

I have one these in a 2 cubic foot sealed box in my 94 civic coupe and it sounds awesome with any music. Its paired with a Rockford Fosgate Prime 250-1 and a Stinger amp kit. I've put the sub and amp through hours of abuse and never had a problem. I had two Kicker Comp 12's in there with an Alpine 500 in a ported box at 35 hz and they didn't sound near as good as this one subwoofer. This subwoofer isn't going to rattle the car next to you but you will be heard. I have people asking me what I have back there and I say its a 12 with 250 watt amp and they think I have a 15 back there. I'm like yeah you can have awesome bass without upgrading your alternator and battery. Just do your research and you might be surprised with lower end name brand audio equipment. Hope this review helps.

12 of 20 found this helpful

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Josh

Glendale, AZ

Overall
Durability
Value
Features
Design
Usability
Great Subs

February 23, 2014

Bump hard and friends are jealous. Couldn't ask for more.

12 of 23 found this helpful

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alberto

washington dc

Overall
Durability
Value
Features
Design
Usability
there great

December 23, 2012

These. Subwoofers are great and the price is great. Worth the money.

12 of 26 found this helpful

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Keith

Pulaski, TN

Overall
Durability
Value
Features
Design
Usability
Speakers

March 29, 2014

I've owned allot Rockford fosgate speakers and always very pleased with there sound and power of them

12 of 27 found this helpful

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billy

Tillamook, OR

Overall
Durability
Value
Features
Design
Usability
garbage ....

October 22, 2013

I bought a pair to go behind a 1200watt amp. They blew up in a day. I wasn't even listening to loud or music with lots of bass. They just burnt up. Thought my installer wired em wrong so I ordered another pair and had another professional wire them in... Blew them again in 2 days. Gain was low on the amp ... These are cheap for a reason.

20 of 43 found this helpful

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alex

Waltham, MA

Overall
Durability
Value
Features
Design
Usability
great for money

July 28, 2012

i love the look and quality of these subs, always trust rockford fosgate, they are a reputable company with quality products i had two of these in a small slanted box and they sounded great. with the right amp they will pound.

14 of 31 found this helpful

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Noah

ashkum, Ill

Overall
Durability
Value
Features
Design
Usability
Rockford Fosgate R2D4-12 (R2D412)

July 23, 2011

This sub is amazing. At first i was shotty of the prime series, but have i ever been proven wrong. i have 2 of these hooked up to a punch 500-2, and they slam hard. i do suggest a ported box. for the price, they are amazing

20 of 44 found this helpful

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Josh

Salisbury, MD

Overall
Durability
Value
Features
Design
Usability
powerful subs, MUST buy

October 8, 2012

These subs hit HARD, i have 2 in the trunk of my Ford Focus sedan with a crossfire C3501 amp, and ive been running this system for about 6 months. It has won me some money, and even been in the top 10 of audio comps, these subs handle power well, and ive been pushing them hard for 6 months, and they run like a charm, the range is really good, but they hit the hardest between 30 and 75hz, If your looking for a good alternative to kicker CVR's or Apline type R's, these are your go to, and for a great price. I plan on upgrading to a 3 12's with these exact subs. I must say I love Rockford Fosgate and am a life-long buyer.

15 of 35 found this helpful

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DRS37129

Murfreesboro, TN

Overall
Durability
Value
Features
Design
Usability
Great Bass

June 12, 2012

I wanted some bass but this provides A LOT of bass. It sounds great but still allows you to hear the high frequency sounds. The bass is not distorted either.

15 of 35 found this helpful

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Accessory Tools and Products

Accessories added

25 ft. of Streetwires 12 Gauge Speaker Cable

You'll need speaker wire to hook up that new subwoofer!

Your Price $44.95

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $14.99

20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

Your Price $59.99

Stinger Sound Dampening Trunk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

Your Price $69.99

Dynamat Sound Dampening Trunk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $94.95

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

Your Price $6.99

40" x 15 Ft Piece of Premium Un-Backed Automotive Trim Carpet

Durable design for long life-span, available in many colors and shades.

Your Price $39.99

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $1.99

2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

Your Price $7.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $16.99

Xscorpion 9-Piece Nylon Plastic Pry and Chisel Tool Set

Easily removes dash/trims, door clips, panels and pins, rubber grommets and vehicle emblems.

Your Price $14.99

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

12" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

Your Price $4.99

Scosche SPL Meter

Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

Your Price $21.99

1 Rockford Fosgate R2D4-12 Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Rockford Fosgate R2D4-12 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 Rockford Fosgate R2D4-12 Subwoofers

Mono Amp

4 Channel Amp

4 Rockford Fosgate R2D4-12 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

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Browse 3 questions and 4 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
Replacement from busting my old one. This one is better than the one I had and i will be coming here for more purchases for my car
dylan c on May 31, 2015
best amp for 2 subs?
Alec L on Nov 20, 2014
Best Answer: Depends on the impedance of the subs. I always use class d mono block amps. Match the subs to the amp or match the amp to the subs. Fosgate is always number 1 pick. I personally don't like this set up as it only allows either a 1 ohm or 4 ohm set up. I would use the r2d2 12's, wire the voice coils in a series to make each sub a 4 ohm load, then wire the subs parallel to the amp with a final load of 2 ohm. The r500x1d would be perfect for that set up. If you are using Fosgate r2d4 12's, the use you will have to spend more money on the amp to get one that will push higher watts to a 4 ohm load or one that is capable of handling a 1 ohm load. For that I would recommend the p500x1bd.
Reply (1) · Report · Michael P on Nov 21, 2014
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would this sub be compatable with the Sony XMN502 2.1 channel amp? Ive never wired up a DVC sub so i dont know if the amp being 2 channel at 2ohms will work with your wiring guides.
jack1 on Jul 10, 2015
Best Answer: Hell Jack,

Unfortunately, the Sony XMN502 is not a good match for the R2D4-12 . The subwoofer can be wired in parallel to a 2ohm load, but bridging the amp is NOT stable below 4ohms. Alternatively, the sub can be wired in series to an 8ohm load, but the amplifier will not put out enough power to driver the woofer properly. That amplifier put out decent power for door speakers, but not a subwoofer(s), and as such should be upgraded to a proper monoblock. Preferably one that is doing ~250w @2ohms. give our sales team a call for help.
Reply · Report · Rick MStaff on Jul 10, 2015
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Product Summary

Manufacturer

Model Number

R2D4-12

UPC

780687332563

Weight

10.00lbs

Internal SKU

r2d412

Internal Product ID

33744

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 R2D4-12

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