(2) Alpine Type-R R2-W12D4 12" 750w RMS Dual 4-Ohm Car Subwoofers Subs R2W12D4

$499.90 $759.90 Sold out
Shipping calculated at checkout.
Product Description

Description of R2-W12D4:

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: 12”
  • Dimensions: 11.61” x 11.61” x 6.43”
  • Frequency Response: 24Hz - 200Hz
  • Power Range: 300W - 750W RMS
  • Power Handling: 750W RMS / 2250W Peak
  • Magnet Weight: 144 oz
  • Voice Coil Diameter: 65.5 mm (2.6”)

THIELE-SMALL PARAMETERS

  • Sensitivity (1W/1m): 84.6 dB
  • DC Resistance (Re): 3.5? + 3.5?
  • Free Air Resonance (Fs): 30 Hz
  • Equivalent Stiffness: 32.8 L
  • Mechanical Q (Qms): 6.51
  • Electrical Q (Qes): 0.55
  • Total Q (Qts): 0.51
  • Cone Area (Sd): 479 cm2
  • Linear Excursion (Xmax): 20 mm
  • Mechanical Travel (Xmech): 72 mm

SEALED BOX RANGE

  • Net Internal Volume: 0.55 - 1.0 ft3

RECOMMENDED SEALED BOX

  • External Dimensions: 14” x 14” x 11”
  • Gross Internal Volume: 0.85 ft3
  • Net Internal Volume: 0.75 ft3
  • D2 - F3, Qtc: 43 Hz, 0.65
  • D4 - F3, Qtc: 39 Hz, 0.84

VENTED BOX RANGE

  • Net Internal Volume: 1.0 - 1.5 ft3
  • Fb, Tuning: 33-37 Hz

RECOMMENDED VENTED BOX

  • External Dimensions: 12.5” x 14” x 25.5”
  • Gross Internal Volume: 1.91 ft3
  • Vent Area (W x H): 18.75 in2 (12.5” x 1.5”)
  • Vent Length: 22”
  • Vent Displacement: 0.36 ft3
  • Net Internal Volume (Vb): 1.45 ft3
  • D2 - F3, Ripple, Fb: 29 Hz, 4.3 dB, 36 Hz
  • D4 - F3, Ripple, Fb: 28 Hz, 5.8 dB, 36 Hz

 
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