Package Includes:

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

What's in the Box:

• The Epicenter
  
• ACR-1 Remote
  
• Power Connector
  
• Manual
  
• Warranty

Description of The Epicenter (Black):

Digital bass restoration processor

Your MP3 player thinks your car stereo is a pair of headphones, so it removes the bass! The Epicenter restores the earth-shaking power and heart-pounding bass your subwoofers crave.

Give your subwoofers the juice to go lower and hit harder.  The Epicenter uses a bass circuit to drive your subwoofers lower, grabbing the attention of every eye on the boulevard.

Features:

• Patented Bass Maximizer™
• Dash mount control
  
• Bass restoration lighted display
  
• Parametric bass control
  
• PFM Subsonic Filter
  
• Balanced inputs
  
• Bass Output Control
  

Specifications:

Inputs

• Preamp Inputs: 1 (2 channels)
  
• Maximum Input Level: 15Vrms
  
• Input Impedance: 10kO
  

Outputs

• Preamp Outputs: 1 (2 channels)
  
• Maximum Output Level: 13.5Vrms
  
• Output Impedance: 150O
  

Performance

• Total Harmonic Distortion: 0.003%
  
• Frequency Response: 10Hz-100kHz
  
• Signal to Noise: 110dB
  

Control

• Remote In
  

General

• Power Supply: High Headroom PWM Switching
  
• Current Draw: 150mA
  
• Recommended Fuse Rating: 1A
  

Weights & Dimensions

• Dimensions: 8?W x 5.5?D x 1.2?H
  
• Weight: 1.8 lbs (0.8 kg)