Car Subwoofer Audiocontrol SPK-12S4 12'' 4 ohm High Performance. Ideal for music lovers seeking clean, precise bass.

• High displacement design for extremely low bass.
• Paper Fiber Matrix cone with Mica coating.
• High-temperature 3-stage voice coil.
• Dual damping system for linear bass reproduction.
• Dual dust cover system for housing compression control.
• Heavy-duty motor design.
• Includes removable grille.

Specifications:

• Nominal Impedance (Z): 4 ohms
• DC Resistance (Re): 3.2 ohms
• Resonant Frequency (Fs): 40.4239 Hz
• Diaphragm Area (Sd): 0.0491 m2
• Force Factor (BL): 13.7286 T.m
• Mechanical Q Factor (Qms): 6.5823
• Electrical Q Factor (Qes): 0.8207
• Total Q Factor (Qts): 0.7297
• Sensitivity 1W/M (SPL): 85.4588
• Mechanical Compliance (Cms): 0.0815 mm/N
• Moving Mass (Mms): 190.3035 g
• Linear Displacement (Xmax): 14 mm
• Acoustic Compliance Volume (Vas): 27.4067 Ltr
• Efficiency Reference (NO): 0.2118% RMS
• Power Handling (Pe): 500 Watts
• Frequency Response: 20-200 Hz
• Voice Coil Diameter: 2.5 in/63.5 mm
• Displacement: 0.0885 cu ft

Dimensions:

• Overall Dimensions: 12.76 in/324 mm
• Cutout Diameter: 11.125 in/282 mm
• Mounting Depth: 6.14 in/156 mm
• Mounting Height (without grille): 0.68 in/17.3 mm
• Mounting Height (with grille): 1.437 in/36.5 mm
• Motor Diameter (with cover): 6.41 in/163 mm