Rockford Fosgate R2SD4-10

Features:

• 10 Inch Dual 4 ohm Shallow Mount Prime Stage 2 Series Subwoofer
• Power Handling:
  • Peak: 400 watts
  • RMS: 200 watts
• Recommended power range: 100 - 200 watts RMS
• Mica injected polypropylene cone
• Black raised surround
• Linear spider with 16 AWG woven tinsel leads
• StampCast basket with integrated spider venting
• CEA-2031 Compliant accurate power handling rating
• Designed for use with sealed and vented enclosures
• High temperature voice coil
• Integrated PVC trim ring
• Anodized aluminum voice coil former
• Frequency response: 45-250 Hz
• Sensitivity: 82 dB
• Mounting depth: 3-7/16 Inch
• Cutout diameter: 9-1/8 Inch

Specifications: 

Subwoofer Specifications:

• Subwoofer Series: Prime R2
• Subwoofer Size: 10 Inch
• Peak Power Handling: 400 watts
• RMS Power Handling: 200 watts
• Voice Coil(s): Dual
• Impedance (Per Voice Coil): 4 ohms
• Voice Coil Diameter: 2 Inch
• Frequency Response: 45 - 250 Hz
• Sensitivity: 82 dB
• Xmax (millimeters): 8 mm
• Subwoofer Design: Round / Circle
• Main Cone Color: Black
• Woofer Composition: MIPP
• Woofer Surround: Foam
• Magnet Structure: Single Stacked
• Subwoofer Grille: No
• Re-Cone Kit Available: No

Electromechanical Parameters:

• Free-Air Resonance (Fs): 39.3 Hz
• Equivalent Compliance (Vas): 21.7 liters
• Total Speaker Q Value (Qts): 0.73
• Electrical Q Value (Qes): 0.81
• Electrical Resistance of Voice Coil (Re): 6.60 ohms
• Mechanical Q Value (Qms): 7.00