Powerful, realistic bass If you like your music loud and clear, Alpine's R-Series R2-A75M amplifier is for you. It cleanly reproduces the bass in your music so you can enjoy the enhanced realism you want, even when you're playing high-res music. Alpine has built some of its top-of-the-line amplifier technology into this R2-Series amp, including high-efficiency transformers, premium low-noise custom capacitors, and low-distortion dual "Sierra" feedback/correction circuitry. How much power? The R2-A75M mono subwoofer amplifier produces up to 750 watts RMS, making it a perfect match for an Alpine R-Series subwoofer. Advanced Class D amp technology makes this powerful amp small enough to fit almost any location. You can adjust the amp's low-pass filter, bass boost, and subsonic filter to get just the right bass tone. R2-A75M connection panel Product highlights: mono subwoofer amplifier 500 watts RMS x 1 at 4 ohms 750 watts RMS x 1 at 2 ohms variable low-pass filter (50-400 Hz, 24 dB/octave) variable bass boost (0-12 dB at 50 Hz) variable subsonic filter (8-40 Hz, 24 dB/octave) preamp and speaker-level inputs speaker wire to RCA adapter required for speaker-level input preamp outputs wiring and hardware not included with amplifier 4-gauge power and ground leads recommended fuse rating: 40A x 2 dimensions: 11.12"W x 2.23"H x 6.91"D warranty: 1 year MFR # R2-A75M Item # 500R2A75M Please read www.P65Warnings.ca.gov. for your Proposition 65 WARNING. What's in the box: Mono subwoofer amplifier (two 40A ATO fuses installed) Four 1" pan-head screws 3mm Allen key 2.5mm Allen key Owner's manual (En/ Sp/ Fr/Others) Alpine Verification Certificate Warranty information Power supply note On-line product registration information