Alpine R-W10D4 R-Series 10-Inch Dual 4 Ohm Subwoofer 2017 Model

Alpine R-W10D2 10-Inch Dual 4 Ohm Subwoofer

Features:
High Amplitude Multi-Roll surrounds (HAMR)
Parabolic Cone Structure with Pulp/Kevlar Cone & PP/Mica/Talc Dust Cap.
Concealed Mount Gasket.
Reinforced Cone Neck & Spider Joint.
Progressive Spider with Reinforced Layer Tinsel Leads.
Integrated 8 AWG Push Terminals with VC Configuration Jumpers.
High-Excursion Overhung Voice Coil Configuration.
High-Grade Strontium Ferrite Segmented Assembly.
65mm Voice Coil with High Temp 4-Layer DVC Winding on AL former.
Airflow Optimized Dual Flare Pole Vent.
Cast Aluminum Frame with Integral Shorting Sleeve.
Compound Radius Curve Extended Pole Geometry.
Airflow Management & Heat Transfer System.

Specifications:
Size: 10 Inches.
Frequency Response: 26Hz-200Hz.
Power Range: 300W-750W RMS.
Power Handling: 750W RMS / 2250W Peak.
Magnet Weight: 111oz.
Voice Coil Diameter: 65.5mm / 2.6".
Sensitivity (SPL): 82.4dB.
DC Resistance (Re): 3.6 Ohm + 3.6 Ohm.
Inductance (Le): 4.46 mH.
Free Air Resonance (Fs): 31 Hz.
Equivalent Stiffness (Vas): 20 L.
Mechanical Q (Qms): 7.71.
Electrical Q (Qes): 0.59.
Total Q (Qts): 0.55.
Cone Area (Sd): 333cm^2.
Linear Excursion (Xmax): 20 mm.
Mounting Depth: 5-7/8 Inch Mechanical Travel (Xmech): 70 mm.

Box Specifications:
Sealed Box Net Internal Volume: 0.4-0.85 ft^3
Ported Box Net Internal Volume: 0.75-1.3 ft^3
Ported Box Tuning Range: 35-39 Hz