Alpine SWR-12D4 12″ subwoofer

12″ 1000w RMS (3000w peak) 4 ohm subwoofer


Type-R Subwoofers now offer unique Alpine technology and massive power handling to achieve even cleaner and deeper bass extension, faster and more accurate transients, and greater output capability. With more power handling and patented Alpine technology for lower distortion and higher SPL, the new Type-R subs take performance to all new heights.


Kevlar-Reinforced Carbon Fibre Cone
Aluminium honeycomb
Kevlar-Reinforced pulp for maximum strength
High-efficiency thermal management
High-Amplitude Multi-Roll Surround
heavy-gauge push terminals
Peak Power Handling: 3000W
RMS Power Handling: 600W
Nominal Impedance: 2ohms+2ohms
Frequency Response: 26Hz-200Hz
Mounting Dimensions: 275mm diameter x 161.8mm depth


Sealed: 12″
Frequency Response: 24Hz-200Hz Power Range: 300W – 1000W RMS
RMS Power Handling: 1000W
Peak Power Handling: 3000W
Magnet Weight: 127oz
Voice Coil Diameter: 65.5 mm (2.6″)

Thiel-Small Parameters
Sensitivity (1W/1m): 84.7dB
DC Resistance: 1.95ohms + 1.95ohms
Inductance: 2.23 mH
Free Air Resonance: 27 Hz
Equivalent Stiffness: 46L
Mechanical Q: 7.1
Electrical Q: 0.47
Total Q: 0.44
Cone Area: 479cm²
Linear Excursion: 20 mm
Mechanical Travel: 72 mm
Note: Specifications are subject to change without notice.

Sealed box range
Net Internal Volume: 0.55-1.0 ft³

Recommended Sealed Box
External box dimensions: 14″x14″x11″
Gross internal volume: 0.85 ft³
Net internal volume: 0.75 ft³ F3, Qtc: 45 Hz, 0.75

Vented box range
Net internal volume: 1.0-1.5 ft³
Tuning: 32-37 Hz

Recommended vented box
External box dimensions: 23″ x 12.5″ x 14″ Gross internal volume: 1.71 ft³ Dimensions: 12.5in² (12.5″x1″)
Gross internal volume: 19″
Vent displacement: 0.23 ft³
Net internal volume (Vb): 1.38 ft³
F3, ripple, Fb: 29Hz, 4.6dB, 35Hz

Recommended enclosure net internal volume is based upon 3/4″ (19mm) MDF enclosure construction.


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