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

The new R-Series subwoofers now feature larger, double-stacked magnets that contribute more motor force for deeper bass and tighter bass control. An integrated Faraday ring minimizes distortion for cleaner bass output. A Kevlar-treated cone ensures durability in the subwoofer for reliable performance, even at high volumes. A new Polypropylene/ceramic composite dust cap ensures rigidity while also providing incredible internal damping. The new R-Series subwoofers contain a Dual Voice Coil (DVC) with easy configuration jumpers that allow for flexible applications. A new “EZ-Change” twist-lock grille mounting system makes it easy to install and remove an optional grille without mounting screws for added protection to the cone. The new R-Series subwoofers contain Alpine’s High Amplitude Multi-Roll (HAMR) Surround Technology. The R-Series subwoofers are High-Resolution Audio Compliant. Rated at 750W RMS (2250 peak power handling), the R-Series subwoofers will provide deep bass output.

Key Features

• Dual Voice Coil (DVC) Subwoofers with Configuration Jumpers
• Frequency Response (0/-3dB): 24Hz-200Hz
• Sensitivity (1W/1m): 84.5dB
• Nominal Impedance: 2Ω (4+4) or 4Ω (2+2)
• 65mm voice coil
• CTA-2031 compliant
• Mounting Depth: 6-1/2” (165mm)
• Cutout Size: 10-7/8” (275mm)
• XMax: 20mm
• Magnet Weight: 144 oz
• Push-Type Speaker Terminals (Up to 8AWG Wire Size)
• Polypropylene/Ceramic Composite Dust Cap
• Kevlar Reinforced Pulp Cone High-Performance subwoofers
• Twist-Lock Grille Mount System
• High-Amplitude Multi-Roll (H.A.M.R.) Surround
• Hi-Res Audio Compliant (High-Resolution Audio Playback)
• Large Double-Stacked Magnets
• 750W RMS/2250W Peak Power Handling

General 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”)

BOX SPECS

• SEALED BOX RANGE:
• Net Internal Volume: 0.55 - 1.0 cubic ft
• RECOMMENDED SEALED BOX:
• External Dimensions: 14” x 14” x 11”
• Gross Internal Volume: 0.85 cubic ft
• Net Internal Volume: 0.75 cubic ft
• D2 - F3, Qtc: 43 Hz, 0.65
• D4 - F3, Qtc: 39 Hz, 0.84
• VENTED BOX RANGE:
• Net Internal Volume: 1.0 - 1.5 cubic ft
• Fb, Tuning: 33-37 Hz
• RECOMMENDED VENTED BOX:
• External Dimensions: 12.5” x 14” x 25.5”
• Gross Internal Volume: 1.91 cubic ft
• Vent Area (W x H): 18.75 in2 (12.5” x 1.5”)
• Vent Length: 22”
• Vent Displacement: 0.36 cubic
ft
• Net Internal Volume (Vb): 1.45 cubic
ft
• D4 - F3, Ripple, Fb: 28 Hz, 5.8 dB, 36 Hz

R2-W12D4 - 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