Alpine R2-A75M R-Series Mono Subwoofer Amplifier – 750W at 1-Ohm, Hi-Res Certified – Elevate Your Audio with the Alpine R2-A75M Mono Amplifier – delivering powerful 750W performance in a sleek, compact design. Built with Alpine’s cutting-edge Class D Amplifier Circuit, this next-generation R-Series amp offers exceptional sound quality and efficiency, making it the perfect addition to any car audio system. MAIN FEATURES 750W Mono Amplifier Alpine’s Class D Amplifier Circuit Reduced Footprint(15% smaller vs previous model) One-Sided Terminal Layout Top Panel Sound Controls Optional Remote Bass Knob Compatible(required RUX-KNOB.2 or RUX-H01, sold separately) TECH SPECS Dimensions: 11.1” W x 2.17” H x 6.5” D Power Rating: 14.4V, ≤ 1% THD +N Power Output: 500W RMS x 1 @ 4Ω, 750W RMS x 1 @ 2Ω S/N Ratio: >75dB Frequency Response: 10Hz – 400Hz Damping Factor: >250 Alpine RUX-KNOB.2 Remote Bass Knob