The Alpine RS-W10D4 is a premium ultra-shallow 10-inch R-Series subwoofer engineered for vehicles with limited mounting depth but demanding serious bass performance. It combines Alpine’s Gen2 DD-Linear magnetic motor technology, massive 20mm excursion capability, and a compact 3.25-inch mounting depth to deliver output comparable to many full-size subwoofers while fitting in tight truck and stealth-install applications Main Features 10” ultra-shallow R-Series subwoofer Dual 4-ohm voice coils 600W RMS / 1800W peak power handling Only 3.25” mounting depth 20mm X-Max excursion Alpine Gen2 DD-Linear magnetic circuit Oversized 4” voice coil Powerful neodymium motor structure Cast aluminum frame Aluminum dust cap Designed for compact truck and stealth applications Compatible with KTE-RS10G grille kit Specs Specification Details Subwoofer Size 10" Voice Coil Configuration Dual 4Ω RMS Power 600W Peak Power 1800W Mounting Depth 3.25" X-Max 20mm Frequency Response 29Hz – 200Hz Sensitivity 83 dB Voice Coil Diameter 4" Magnet Type Neodymium Approx. Shipping Weight ~18–24 lbs