Alpine R-Series Shallow 10" Subwoofer (RS-W10D4) with Shallow Subwoofer Cabinet

Used ( Less than 2 Months old )

• Extreme Excursion: Despite a slim 3.25-inch top-mount depth, it maintains 20mm of one-way excursion (X-max), matching the heavy displacement and output of a standard full-depth R-Series subwoofer.
• Advanced Motor Technology: It integrates a lightweight, high-energy Neodymium magnet and an oversized 4-inch voice coil. This utilizes Alpine's Gen2 DD-Linear Magnetic Circuit technology for lower distortion and precise cone control.
• Rigid Construction: The woofer features a polypropylene cone bonded to a lightweight aluminum dust cap, supported by a heavy-duty butyl rubber surround and a solid cast aluminum frame to eliminate flexing.

• RMS Power Handling: 600 Watts
• Peak Power Handling: 1800 Watts
• Frequency Response: 29 Hz – 200 Hz
• Sensitivity (1W/1M): 83 dB (Note: Some regional measurements cite a lower 78 dB acoustic sensitivity within compact air volumes)
• Nominal Impedance: Dual 4-Ohm voice coils (Can be wired to a 2-Ohm or 8-Ohm load) 

• Top-Mount Depth: 3.25 inches (81 mm)
• Cutout Diameter: 9.57 inches (243 mm) (Note: This mounting cutout is slightly larger than standard 10-inch subwoofers)
• Maximum Linear Excursion (Xmax): 20 mm (one-way)
• Voice Coil Diameter: 4 inches (102 mm)
• Magnet Weight & Type: Lightweight, high-energy Neodymium

• Free-Air Resonance (Fs): 31 Hz
• Equivalent Compliance (Vas): 23.35 Liters
• Total Speaker Q Value (Qts): 1.19
• Electrical Q Value (Qes): 1.66
• Mechanical Q Value (Qms): 5.72
• DC Resistance (Re): 3.6 Ohms 

• Structural Rigidity: Built using CARB-compliant, high-density 3/4-inch Medium-Density Fiberboard (MDF) to eliminate box resonance and output-robbing flexing. The basket of the driver counter-sinks flush into the enclosure and physically doubles as internal bracing.
• Ultra-Slim Profile: It measures just 5.38 inches tall and 21.13 inches wide, creating an easy fit under or behind vehicle seats where cargo space is at a premium.
• Pre-Wired for Performance: The subwoofer's dual 4-ohm voice coils are pre-wired internally in a parallel configuration. This drops the load down to a stable 2-ohm total impedance at the external spring-post terminal cup.
• Versatile Placement: The cabinet features a fully finished exterior wrapped in premium embroidered black carpet and a pre-installed protective steel mesh grille. It includes modular, stackable rubber feet allowing it to be used as either an upward-firing or downward-firing box.