Alpine R2-W12D4 12" R-Series "R2" Subwoofer, Dual 4-Ohm, 750 Watt RMS

Alpine R2-W12D4 12" R-Series "R2" Subwoofer, Dual 4-Ohm, 750 Watt RMS

PRODUCT OVERVIEW
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.
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.

General Specs:
• 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”)

T/S Parameters:
• Sensitivity (1W/1m): 84.6 dB
• DC Resistance (Re): 3.5Δ + 3.5Δ
• 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

BOX SPECS -
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

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