Description
Alpine SWR-12D4 – 12″ Type R Subwoofer
Features
- 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: 1000W
- Nominal Impendance: 4ohms+4ohms
- Frequency Response: 26Hz-200Hz
- Mounting Dimensions: 275mm diameter x 161.8mm depth
Specifications
General
- 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): 84.9dB
- DC Resistance: 3.8ohms + 3.8ohms
- Inductance: 3.33 mH
- Free Air Resonance: 28 Hz
- Equivalent Stiffness: 46L
- Mechanical Q: 6.04
- Electrical Q: 0.52
- Total Q: 0.48
- 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, 0.81
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, 4.4dB, 35Hz
Notes:
- Recommended enclosure net internal volume is based upon 3/4″ (19mm) MDF enclosure construction.
- Consult below for alternative enclosure net internal volume calculation.
- Front mount displacement* (magnet in): -0.10 ft³
- Reverse mount added volume* (magnet out): +0.09 ft³
Based upon 3/4″ (19mm) baffle thickness, with opening cut approximately to gasket inner diameter.
