The Alpine R2-W8D4 is a next-generation 8-inch R-Series subwoofer engineered for powerful bass performance in compact spaces. Featuring Alpine’s updated R-Series motor structure, HAMR surround technology, Kevlar-reinforced pulp cone, and dual 4-ohm voice coils, the R2-W8D4 delivers deep, tight, and highly accurate bass while handling up to 350 watts RMS. Designed for both sealed and ported enclosures, the R2-W8D4 features a larger double-stacked magnet assembly and integrated Faraday ring for improved motor force, reduced distortion, and tighter bass control compared to previous generations. Its compact mounting depth makes it ideal for trucks, under-seat applications, and stealth audio builds where space is limited. Features 8” R-Series high-performance subwoofer Dual 4-ohm voice coil configuration Kevlar reinforced pulp cone Polypropylene/ceramic composite dust cap HAMR (High Amplitude Multi-Roll) surround Large double-stacked magnet structure Integrated Faraday ring for reduced distortion Twist-lock grille mounting system Push-type speaker terminals High-resolution audio compliant Designed for sealed or ported enclosures Specifications Subwoofer Size: 8” RMS Power Handling: 350 Watts RMS Peak Power Handling: 1000 Watts Peak Voice Coil Configuration: Dual 4-Ohm Frequency Response: 30Hz – 200Hz Sensitivity: 83.5 dB Mounting Depth: 4-3/8” Cutout Diameter: 6-15/16” XMAX: 12mm Magnet Weight: 56 oz Voice Coil Diameter: 2.6” Recommended Sealed Box: 0.25 ft³ Recommended Ported Box: 0.68 ft³ tuned to 39Hz Included In The Box Alpine R2-W8D4 subwoofer Cosmetic trim ring Dual voice coil jumper wires Owner’s manual
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