Alpine W12S4

Features:

• 12-inch Single 4-ohm voice coil car sub
• Power handling
• Peak: 750  watts
• RMS: 250 watts
• Push/spring post terminals for easy connection of up to 8 gauge wire or single or dual banana plugs
• Progressive Wavelet Ribs (PWR) cone design keeps distortion low by helping to break up standing waves and cone resonances
• Ideal sealed box volume of 1.09 ft³ and an ideal ported box size of 1.84 ft³, using a slot port measuring 12-1/2-inch (W) x 1-inch (H) x 10-inch (L)
• Two-Piece Yoke that uses a vented pole to provide improved air flow and assist with voice coil cooling
• Polypropylene-Mica woofer cone composition
• Poly-Foam surround
• Sensitivity: 87.9 db at 1 watt
• Frequency Response: 22-200 Hz

Specifications:

• Size: 12 -inch
• Impedance: 4 ohms
• Cone Material: Polypropylene and Mica
• Surround Material: Poly-Foam
• Ideal Sealed Box Volume (cubic feet): 1.09
• Ideal Ported Box Volume (cubic feet): 1.84
• Port diameter (inches): N/A
• Port length (inches): N/A
• Free-Air: No
• Dual Voice Coil: No
• Sensitivity: 87.9 dB at 1 watt 
• Frequency Response: 22 - 200 Hz
• RMS Power Range (Watts): 50-250
• Peak Power Handling (Watts): 750
• Top Mount Depth (inches): 5 5/16
• Bottom Mount Depth (inches): N/A
• Cutout Diameter or Length (inches): 10 9/16
• Vas (liters): 64.3
• Fs (Hz): 30
• Qts: 0.49
• Xmax (millimeters): 10