The Roswell R1 1000.1 Marine Amplifier is a mono-block stackable Class-D design that pairs perfectly with new Roswell R1 Subs. It also features a calibrated potentiometer. This amp is super powerful and can run two R1 12" subwoofers or four R1 10" subwoofers. Get bumpin'.• Space-saving stackable design• Lit logo power indicator lets you know your amp is receiving power• Low-pass and subsonic filters (12 dB/oct.)• Switchable differential RCA inputs minimize interference and induced noise• Bass boost control (0-18dB @ 45Hz)• Conformal-coated PCBs• Full 0-180° phase control• Nickel-plated wire terminals• High-efficiency Class-D topologySpecificationsContinuous Power RMS: 400W @ 4ohm, 675W @ 2ohm, 1000W @ 1ohmFrequency Response: 10Hz - 400HzInput Sensitivity: 0.2 - 10.0VHPF (High Pass Filter): 30Hz - 300HzLPF (Low Pass Filter): 30Hz - 300HzBass EQ: 0 - 18dB @ 45HzSubsonic Filter: 10Hz - 55HzDimensions: 1.90" x 7.06" x 11.125" Space-saving stackable design Low-pass & subsonic filters Conformal-coated PCBs & nickel-plated wire terminals | Roswell Wake Air R1 1000.1 Marine Amplifier