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Variants
Reviewers report the Prime 12" R2 delivers tight, punchy bass with solid build and strong value, performing well in small enclosures and with modest RMS amps when properly matched.
Buyer confidence
82%Highlights
- 1 Year Warranty
- StampCast basket with integrated spider venting
- Mica reinforced polypropylene cone
- Anodized aluminum voice coil former
Key specs
Full specs- Size
- 12"
- Subwoofer Type
- Standard
- Re (Ohms)
- 7.17
- Nominal Impedance
- Dual 4-Ohm
- Sd (cm2)
- 539.1
- Vas (Liters)
- 68.8
- Fs (Hz)
- 34.9
- Qms
- 7.33
Key specs
Full specs- Size
- 12"
- Subwoofer Type
- Standard
- Re (Ohms)
- 7.17
- Nominal Impedance
- Dual 4-Ohm
Highlights
Overview- 1 Year Warranty
- StampCast basket with integrated spider venting
- Mica reinforced polypropylene cone
Review highlights
Based on customer reviewsRockford Fosgate Prime 12" R2 4-Ohm DVC Subwoofer — punchy, affordable 12" bass
Reviewers report the Prime 12" R2 delivers tight, punchy bass with solid build and strong value, performing well in small enclosures and with modest RMS amps when properly matched.
What buyers praise
- Tight, punchy low-end response
- Strong output for the price
What to watch for
- Deep bass below ~40Hz can be limited, especially in sealed enclosures
Overview
The Prime R2D4-12 is a 12" Rockford Fosgate subwoofer rated at 250 Watt RMS with a 4‑ohm dual voice coil (DVC). It combines a mica-injected polypropylene cone and stamped-cast basket with spider venting for reliable bass performance.
Best for
- Car audio fans seeking strong low-frequency output
- Installations needing wiring flexibility from a DVC subwoofer
- Systems using sealed or vented enclosures
Key points
- Size: 12-inch driver
- Power handling: 250 Watt RMS
- Voice coil: 4‑ohm dual voice coil (DVC) for multiple wiring options
- Cone: mica-injected polypropylene for durability and sound
- Basket: stamp-cast with spider venting to help motor cooling
- Additional tech: anodized aluminum voice coil former; stitched tinsel leads
Fit and use
Optimized for use in sealed or vented enclosures. The 4‑ohm dual voice coil lets you configure the subwoofer for different overall impedances to better match an amplifier and system requirements. Select enclosure volume and amplifier power to suit desired bass response.
What to know
Rated at 250W RMS — match amplifier RMS output to the subwoofer’s rating for reliable operation. A dual voice coil provides wiring flexibility but will change total impedance depending on how coils are wired. The driver’s stamped-cast basket with spider venting and Klippel verification reflect design features aimed at…
Highlights
Key features
- 1 Year Warranty
- StampCast basket with integrated spider venting
- Mica reinforced polypropylene cone
- Anodized aluminum voice coil former
- Optimized for both sealed and vented enclosures
- 12 AWG compression terminals
- Linear spider with embedded 16 AWG tinsel leads
- Integrated PVC trim ring
- Klippel Verified
- CEA-2031
- Anodized Aluminum Voice Coil Former
- Stitched Tinsel Leads
More info
Manufacturer details
Car Audio Fanatics wanting big bass can rely on the Prime R2D4-12 subwoofer. This 12” subwoofer handles 250 Watt RMS and the 4-Ohm Dual Voice Coil design lets you to wire them in various configurations.
Additional details
Car Audio Fanatics who want Rockford Fosgate quality can rely on the Prime Series 10" subwoofers to get the job done, and the Dual Voice Coil provides awesome installation flexibility. These drivers can pump out the bass due to their mica injected polypropylene cone, and their stamp-cast baskets with spider venting - typically reserved for more expensive models - keep the motor running cool! These R2 subwoofers are optimized for sealed and vented enclosures.
Technologies
Klippel Verified
To adorn the ‘Verified with Klippel’ mark, the qualifying company’s loudspeaker engineering personnel must be
CEA-2031
Power handling on Rockford Fosgate speakers conform to CEA-2031 industry standards. This means your speaker has
Anodized Aluminum Voice Coil Former
Two things generally happen when voice coils heat-up. They can generate heat close to the melt-down temp of their
Stitched Tinsel Leads
Multipoint "periodic" stitched lead wire technique reduces the mass of each tinsel lead and spreads stress and
Specs
Specifications
24
| Size | 12" |
| Subwoofer Type | Standard |
| Re (Ohms) | 7.17 |
| Nominal Impedance | Dual 4-Ohm |
| Sd (cm2) | 539.1 |
| Vas (Liters) | 68.8 |
| Fs (Hz) | 34.9 |
| Qms | 7.33 |
| Qes | 0.66 |
| Qts | 0.60 |
| Le (mH) | 3.9 |
| Qes | 0.66 |
| Qts | 0.60 |
| Le (mH) | 3.9 |
| Magnet Weight (oz) | 47.7 oz. (1.35 kg) |
| Shipping Weight | 9.9 Lbs. (4.49 kg) |
| Cutout Diameter | 11.25 in. (285 mm) |
| Woofer Displacement | 0.046 cu. ft. (1.3 Liters) |
| SPL (dB @ 1w/1m) | 89 |
| Xmax (mm) | 6.5 |
| Power Handling (Watts RMS) | 250 Watts RMS 500 Watts Max |
| Mounting Depth | 5.067 in. (128 mm) |
| Sealed Box Volume (Vb) | 1.02 cu. ft. (28.8 Liters) |
| Vented Box Volume (Vb) | 1.79 cu. ft. (50.6 Liters) |
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Installation resources
Wiring diagrams
9
Wiring Diagram #1
Source: Rockford Fosgate
Wiring Diagram #2
Source: Rockford Fosgate
Wiring Diagram #3
Source: Rockford Fosgate
Wiring Diagram #4
Source: Rockford Fosgate
Wiring Diagram #5
Source: Rockford Fosgate
Wiring Diagram #6
Source: Rockford Fosgate
Wiring Diagram #7
Source: Rockford Fosgate
Wiring Diagram #8
Source: Rockford Fosgate
Wiring Diagram #9
Source: Rockford Fosgate
Box Advisor
Sealed Enclosure
- Recommended volume
- 1.02 cu ft
- Volume range
- 0.75 cu ft to 1.25 cu ft
- Dimensions
- 18.5 in W x 17.5 in H x 8.25 in D
- F3
- 51.5 Hz
- Qtc
- 0.98
- Port / ID
- 44 in
- Subwoofer size
- 46 in
- Impedance
- 4 ohm
- Power handling (RMS)
- 250 W
Vented Enclosure
- Recommended volume
- 1.79 cu ft
- Volume range
- 1.5 cu ft to 2 cu ft
- Dimensions
- 20.5 in W x 16.5 in H x 13 in D
- F3
- 39.9 Hz
- Tuning (Fb)
- 45 Hz
- Port / ID
- 46 in
- Subwoofer size
- 46 in
- Impedance
- 4 ohm
- Power handling (RMS)
- 250 W
Support
Return Authorization
If you bought this product from Onkar Electronics, use the Contact Us page on the Onkar Electronics website and we will help with return authorization and warranty support. If you purchased it from another dealer, contact that authorized dealer first for return assistance.
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