12” Prime R1 4-Ohm SVC Subwoofer


The R1S4-12 features a 4-Ohm Single Voice Coil design, 150 Watt RMS power handling, and is optimized for both sealed and vented enclosures.

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₹5,990 per unit

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Mail: info@rockfordfosgate.in
Helpline: 1 800 209 6820


Rockford Fosgate Prime R1 12” subwoofers provide high performance bass at an unbelievable value. This model features a laser etched curvilinear dust-cap to dissipate heat generated by the high‐temp copper voice coil as well as a solid stamped steel frame with integrated frame mounted compression terminals. Best of all, they are optimized for both sealed and vented enclosures.

  • Fiber reinforced painted paper-pulp cone
  • Laser-etched aluminum dustcap
  • High durability compressed foam surround
  • Fatigue resistant poly-cotton spider with integral woven leads
  • Proprietary powder coated stamped steel frame with spider cavity venting
  • Bumped backplate with vented pole piece for greater thermal/mechanical power handling
  • High-temp copper voice coil with aluminum former
  • High-grade Y30 Ferrite magnet
  • Integrated spring-loaded nickel-plated push terminals
  • Integrated ABS decorative trim ring
CEA-2031 Compliant: CEA-2031 Guidelines
Size: 12"
Nominal Impedance: 4-Ohm
Power Handling (Watts RMS): 200 Watts RMS
400 Watts Max
Voice Coil Diameter: 2.0" (50.8 mm)
Magnet Weight (oz): 40 oz. (1.13 Kg.)
Speaker Connector: 12 AWG compression
Fs (Hz): 30.5
Re (Ohms): 3.5
Le (mH): 2.10
Qms: 7.97
Qes: 0.58
Qts: 0.54
Vas (Liters): 90.4
Sd (cm2): 530.9
SPL (dB @ 1w/1m): 90
Xmax (mm): 7.0
Woofer Displacement (in): 0.10 cu.ft. (2.80 Liters)
Cutout Diameter (in):
Mounting Depth (in):
Shipping Weight: 9.25 Lbs. (4.19 Kg.)
Wiring Wizard
Rockford FosgateWoofer WiringWizard

Available Wiring Diagrams

Please consult your amplifier owner's manual for lowest recommended impedance. 

Wiring Diagram #1 

Wiring Diagram #2 

Wiring Diagram #3 

Wiring Diagram #4 

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Wiring Diagram #6 

Wiring Diagram #7 

Wiring Diagram #8 

Wiring Diagram #9 

Speaker Polarity
Your woofer may use one of the following to identify (+/-) terminals.
Positive +
red post
purple (4Ώ)
red (8Ώ)
Negative -
black post
no dot
no dot

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