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) 4 ohms
DC Resistance (Re) 3.2 ohms
Resonance Frequency (Fs)  41.2638 Hz
Piston Area (Sd) 0.0314 m2
Force Factor (BL)  13.6742 T.m
Mechanical Q Factor (Qms) 4.83
Electrical Q Factor (Qes) 0.6576
Total Q Factor (Qts)  0.5788
Sensitivity 1W/M (SPL)  83.7199
Mechanical Comp (Cms)  0.1004 mm/N
Moving Mass (Mms) 148.1991 g
Linear Excursion (Xmax) 14 mm
Volume Acoustic Comp (Vas) 13.8342 Ltr/ 0.4885 Cu ft
Reference Efficiency (NO.)   0.1419% RMS
Power (Pe)  500 Watts
Frequency Response  20-200 Hz
Voice Coil Diameter 2.5 in/63.5 mm
Displacement 0.0626 cu ft/ 1.771 Ltr
In the box:
SPK-10S4, Manual, Warranty
Dimensions:
Overall Dimensions: 10.748in/ 273 mm
Cut Out Diameter: 9.25 in/ 234 mm
Mounting Depth: 5.32in/ 135 mm
Mounting Height (w/o Grille): 0.59in / 15mm
Mounting Height (w/ Grille): 1.30in / 33mm
Motor Diameter (w/ Cover): 6.41in / 163mm