Features:

• Dual Composite 2-piece Cone
• Rubbertek Foam Surround
• Cast Aluminum Basket
• Tork-Tite Terminal
• 3 ” 8-layer Aluminum Voice Coil
• FEA Optimized Motor Structure
• Triple Stack Magnets
• Progressive Spiders
• Wrap around Rubber Gasket

Dimensions:

• SX18 18" Dual 2ohm Subwoofer
• Mounting Depth - 9.5”
• Mounting Hole Diameter - 16.75”
• Overall Diameter - 18.5”
• Bolt Hole Circle - 17.5”
• Motor Width - 6.5”
• Motor Depth - 3.25”
• Basket Depth - 6.25”
• Displacement - 0.22 cu. ft. 

T/S Parameters:

• Electrical Q Value -Qes: 0.53
• Mechanical Q Value -Qms: 6.1
• Total Speaker Q Value -Qts: 0.48
• Free Air Resonance -Fs: 33.2 Hz
• Equivalent Compliance -Vas: 159 liters
• One-Way, Linear Excursion -Xmax: 22 mm
• Efficiency -SPL 1W/1m: 92.7 dB SPL
• Effective Piston Area -Sd: 1210 cm^2
• DC Resistance -Re: 1.9 ohm
• Nominal Impedance -Znom: Dual 2 ohm
• Thermal Power Handling -Pe: 1000 W
• Force Factor -Bl: 21

Recommended Enclosures:

• Ported Compact: 5.5cf tuned @ 35Hz
• Ported Optimal: 8.0cf tuned @ 34Hz

Warranty : 1 year