R2SD2/D4-12

The Rockford Fosgate R2SD2-12 and R2SD4-12 from the Prime R2S Series are high-performance 30 cm (12-inch) shallow-profile subwoofers designed specifically for vehicles with limited installation space. Thanks to their exceptionally slim design with a mounting depth of just 92 mm, they deliver powerful bass reproduction even in tight spaces.

The sturdy, mica-reinforced polypropylene cone ensures precise bass reproduction, while the robust steel basket with ventilation openings helps effectively cool the driver system. The 50-mm voice coil with an anodized aluminum carrier ensures a reliable power handling capacity of 250 watts RMS.

Thanks to the dual voice coils, both models offer flexible connection options for various amplifier configurations. The subwoofers are optimized specifically for compact sealed enclosures, but can also be used in bass-reflex enclosures.

Technical Specifications

• Manufacturer: Rockford Fosgate

• Series: Prime R2S Shallow

• Model: R2SD2-12 / R2SD4-12

• Product Type: Flat Subwoofer / Subwoofer Driver

• Speaker size: 30 cm (12 inches)

• RMS Power Handling: 250 watts

• Maximum Power Handling: 500 watts

• Voice Coils: Dual Voice Coil (DVC)

• Impedance R2SD2-12: 2 × 2 ohms

• Impedance R2SD4-12: 2 × 4 ohms

• Terminal impedance R2SD2-12: 1 or 4 ohms

• Terminal impedance R2SD4-12: 2 or 8 ohms

• Voice coil diameter: 50 mm (2 inches)

• Voice coil height: 26.9 mm

• Voice coil former: Anodized aluminum

• Diaphragm material: Mica-reinforced polypropylene

• Dust-proof cap: polypropylene

• Bead: Foam

• Basket material: Pressed steel

• Terminals: 12-AWG compression terminals

• Linear stroke (Xmax): approx. ±5 mm

• Maximum mechanical deflection: ±20 mm

• Effective membrane area (Sd): approx. 535 cm²

• Magnet weight: approx. 1.45 kg

• Sensitivity: approx. 85 dB (1 W/1 m)

• Outer diameter: 329 mm

• Installation opening: 285 mm

• Installation depth: 92 mm

• Displacement: approx. 1.1 liters

• Recommended enclosure: Sealed or bass-reflex
  
  

Thiele-Small parameters

R2SD2-12 (2 × 2 ohms)

• Resonance frequency (Fs): 29.7 Hz

• Overall Quality (Qts): 0.66

• Electrical quality (Qes): 0.71

• Mechanical Quality (Qms): 9.00

• Equivalent volume (Vas): 65.4 liters

• Moving mass (Mms): approx. 178 g

• Force factor (BL): approx. 13.3 Tm
  

R2SD4-12 (2 × 4 ohms)

• Resonance frequency (Fs): 30.3 Hz

• Total quality (Qts): 0.65

• Electrical quality (Qes): 0.72

• Mechanical Quality (Qms): 7.00

• Equivalent volume (Vas): 65.4 liters

• Mass in motion (Mms): 172.8 g

• Force factor (BL): 17.6 Tm

• DC resistance (Re): 2 × 3.4 ohms

• Voice coil inductance (Le): 4.2 mH
  
  

Recommended Case

Enclosed housing

• Recommended tank volume: 25.5 liters

• Possible volume range: approx. 21.2–35.4 liters

Bass-reflex enclosure

• Recommended tank volume: 50.7 liters

• Bass reflex port diameter: approx. 100 mm

• Enclosure tuning: approx. 40–45 Hz, depending on the design
  
  

Special Features

• Extra-flat design for space-saving installations

• High-performance 30-cm subwoofer with 250 watts RMS

• Dual-voice coil for flexible impedance matching

• Durable polypropylene diaphragm reinforced with mica

• Sturdy steel cage with ventilation for the drive system

• High-quality 50-mm voice coil with aluminum frame

• Optimized for compact, enclosed enclosures

• Also suitable for bass-reflex enclosures
  
  

What's Included

• 1 × Rockford Fosgate R2SD2-12 or R2SD4-12 subwoofer (depending on the selected model)

• 1 × User and Installation Manual