(2) Alpine R2-W10D2 10" Type-R 750w Dual 2-Ohm Car Audio Subwoofers Subs R2W10D2

Description of R2-W10D2:

The next generation of sound performance is here with the new R-Series subwoofers featuring a larger motor structure for more accurate and authoritative bass.

Features:

• New Motor Structure
  The new R-Series subwoofers now feature larger, double-stacked magnets that contribute more motor force for deeper bass and tighter bass control compared to the previous generation.
  
• Oversized Dust Cap
  The new hybrid poly ceramic composite dust cap ensures rigidity while also providing incredible internal damping (vibration absorption) to smooth out the bass response and reproduce tight bass.
  
• Increased Accuracy
  Alpine’s High Amplitude Multi-Roll (HAMR) Surround Technology allows the cone to efficiently move air while staying cool resulting in incredible accuracy from the subwoofer.
  

Specifications:

• Size: 10”
  
• Dimensions: 9.72” x 9.72” x 5.92”
  
• Frequency Response: 26Hz - 200Hz
  
• Power Range: 300W - 750W RMS
  
• Power Handling: 750W RMS / 2250W Peak
  
• Magnet Weight: 123 oz
  
• Voice Coil Diameter: 65.5 mm (2.6”)
  

THIELE-SMALL PARAMETERS

• Sensitivity (1W/1m): 82.3 dB
  
• DC Resistance (Re): 1.9? + 1.9?
  
• Free Air Resonance (Fs): 31 Hz
  
• Equivalent Stiffness: 18.2 L
  
• Mechanical Q (Qms): 7.07
  
• Electrical Q (Qes): 0.5
  
• Total Q (Qts): 0.47
  
• Cone Area (Sd): 333 cm2
  
• Linear Excursion (Xmax): 20 mm
  
• Mechanical Travel (Xmech): 70 mm
  

SEALED BOX RANGE

• Net Internal Volume: 0.4 - 0.85 ft3
  

RECOMMENDED SEALED BOX

• External Dimensions: 12” x 12” x 10.5”
  
• Gross Internal Volume: 0.58 ft3
  
• Net Internal Volume: 0.50 ft3
  
• D2 - F3, Qtc: 44 Hz, 0.70
  
• D4 - F3, Qtc: 42 Hz, 0.78
  

VENTED BOX RANGE

• Net Internal Volume: 0.75 - 1.3 ft3
  
• Fb, Tuning: 35-39 Hz
  

RECOMMENDED VENTED BOX

• External Dimensions: 13” x 11.5” x 25.25”
  
• Gross Internal Volume: 1.58 ft3
  
• Vent Area (W x H): 15 in2 (10” x 1.5”)
  
• Vent Length: 19.5”
  
• Vent Displacement: 0.25 ft3
  
• Net Internal Volume (Vb): 1.25 ft3
  
• D2 - F3, Ripple, Fb: 29 Hz, 6.0 dB, 37 Hz
  
• D4 - F3, Ripple, Fb: 29 Hz, 6.3 dB, 37 Hz

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