This bundle includes 2x Alpine R2-W8D4 8" R-Series "R2" Subwoofer, Dual 4-Ohm, 350 Watt RMS, and an Alpine S2-A60M S-Series Class-D Mono Subwoofer Amplifier, Hi-Res Certified, 600W RMS at 1 & 2-Ohm. The Alpine R2-W8D4 8" R-Series "R2" Subwoofer delivers precise bass with its new motor structure and oversized dust cap. With features like High Amplitude Multi-Roll Surround Technology, it achieves exceptional accuracy. Measuring 7.64” x 7.64” x 4.56”, this subwoofer offers a frequency response of 30Hz - 200Hz and power handling of 350W RMS / 1000W Peak. T/S Parameters include 83.7 dB sensitivity and 43 Hz Free Air Resonance. It's suitable for sealed boxes ranging from 0.15 - 0.45 ft3 and vented boxes from 0.25 - 0.7 ft3 with recommended dimensions provided. The Alpine S2-A60M S-Series Class-D Mono Subwoofer Amplifier is designed for reliable performance and value, with high power output in a compact size. It features an intelligent amplifier platform, improved heat sink, and protection circuit design for uninterrupted music playback. Operating at 14.4 V.DC with input sensitivity ranging from 0.2 - 10 V, it offers a frequency response of 10Hz - 400Hz and THD+N levels of <0.03%. With a Class-D design, Mono Channel configuration, and features like Thermal Management Control, Adjustable Low-pass Crossover, and Remote Bass Control readiness, this amplifier provides a comprehensive audio solution. Enhance your audio experience with this powerful and versatile subwoofer and amplifier bundle from Alpine. Perfectly crafted for seamless integration and exceptional sound performance, this bundle ensures a premium audio setup in your vehicle. Upgrade to the next level of sound clarity and bass precision with Alpine's cutting-edge technology and reliable manufacturing standards. Elevate your car audio system with this high-quality bundle, delivering powerful bass and crystal-clear sound for an immersive listening experience like never before.