The Roswell R1 550.2 Marine Amplifier is the ideal amp to run your R1 Tower Speaker setup. It's a 2-channel Class-D design that puts out 165 watts RMS per channel at 4 ohms and 275 watts RMS per channel at 2 ohms. Features calibrated crossover controls, differential RCA inputs for maximum noise rejection, fully conformal-coated PCBs, and nickel-plated marine-grade wire terminals.• Space-saving stackable design• Ch 1-2 calibrated crossover (FULL/HPF/LPF)• Bridgeable 2-channel design• Marine-grade durability• 4-ohm stable at 165 watts per channel• High-efficiency Class-D topology• 2-ohm stable at 275 watts per channel • Conformal-coated PCBs• Lit logo power indicator lets you know your amp is receiving power• Nickel-plated wire terminals• Switchable differential RCA inputs minimize interference and induced noiseSpecificationsContinuous Power RMS: 165W x 2 @ 4ohm, 275W x 2 @ 2ohmBridged: 550W x 1 @ 4ohmFrequency Response: 10Hz - 25HzInput Sensitivity: 0.2 - 10.0VHPF (High Pass Filter): 30Hz - 300HzLPF (Low Pass Filter): 30Hz - 300HzBass EQ: 0 - 18dB @ 45HzSubsonic Filter: 10Hz - 55HzPhase Control: 0-180°Dimensions: 1.90" x 7.06" x 11.125" Calibrated crossover controls Differential RCA inputs for maximum noise rejection Fully conformal-coated PCBs & nickel-plated marine-grade wire terminals | Roswell Wake Air R1 550.2 Marine Amplifier