Spike Series Subwoofers feature a 3-layer voice coil former to handle some serious power. That means you can turn up the volume and still enjoy heart-pounding bass that’s free from distortion. You won’t believe the sound produced by the fiber matrix paper cone with mica coating – it’s like having a concert in your vehicle! Each Spike subwoofer comes with a protective grille to keep it safe from damage, so you can enjoy your journey with peace of mind.
Features
High Excursion Design for Ultra-Low Bass
Fiber Matrix Paper Cone with Mica Coating
3-Layer High Temp Voice Coil Former
Dual Damping System for Linear Bass Reproduction
Dual Dust Cap System for Enclosure Compression Control
Efficient Heavy-Duty Motor Design
Removable Subwoofer Grille Included
Specifications

Thiele/small parameters
Nominal Impedance (Z)               2 ohms
DC Resistance (Re) ]]                    1.6 ohms
Resonance Frequency (Fs)          37.3460 Hz
Piston Area (Sd)                            0.0491 m2
Force Factor (BL)                         11.0117 T.m
Mechanical Q Factor (Qms)       7.6824
Electrical Q Factor (Qes)             0.7362
Total Q Factor (Qts)                    0.6718
Sensitivity 1W/M (SPL)               84.6196
Mechanical Comp (Cms)            0.0764 mm/N
Moving Mass (Mms)                   237.7651 g
Linear Excursion (Xmax) .          14 mm
Volume Acoustic Comp (Vas)    25.7006 Ltr/ 0.9076 cu ft
Reference Efficiency (NO.)         0.1011% RMS
Power (Pe)                                    500 Watts
Frequency Response                  20-200 Hz
Voice Coil Diameter                   2.5 in/63.5 mm
Displacement                              0.0885 cu ft/ 2.506 Lt
In the box:
SPK-12S2, Manual, Warranty
Dimensions:
Overall Dimensions: 12.76in/ 324mm
Cut Out Diameter: 11.125 in/ 282mm
Mounting Depth: 6.14 in/ 156 mm
Mounting Height (w/o Grille): 0.68in / 17.3mm
Mounting Height (w/ Grille): 1.437in / 36.5mm
Motor Diameter (w/ Cover): 6.41in / 163mm