R1 650.4 4-Channel Marine AmplifierThe R1 650.4 marine-grade amplifier from Roswell, is everything a boat&';s audio system has always wanted. These stackable amplifiers utilize a 4-channel Class-D design that puts out 100 watts RMS per channel at 4 and is perfect for powering an R1 6.5" marine speaker setup.Easily bridge and tune with the calibrated crossover controls. Because LEDs create lots of noise issues, this amp features differential RCA inputs for maximum noise rejection. The R1 650.4 is built with fully conformal-coated PCBs and nickel-plated marine-grade wire terminals to ensure their quality.Features: Ch 1-4 calibrated crossover (FULL/HPF/LPF) Space-saving stackable design Bridgeable 4-channel design Marine-grade durability 2 Ohm Stable at 165 watts per channel High-Efficiency Class-D Topology Conformal-coated PCBs The lit logo power indicator lets you know your amp is receiving power Nickel-plated wire terminals Switchable Differential RCA inputs minimize interference and induced noise Specifications: Continuous Power (RMS): 4: 100W x 4 / 2: 165W x 4 Bridged: 4: 300W x 2 Frequency Response: 10Hz - 25Hz Input Sensitivity: 0.2-10.0V HPF (High Pass Filter): 30Hz - 300Hz LPF (Low Pass Filter): 30Hz - 300Hz Bass EQ: 0-18dB @ 45Hz Subsonic Filter: 10Hz - 55Hz Dimensions: Inches: 1.90 x 7.06 x 11.125 Centimeters: 4.83 x 17.94 x 28.26 Specifications: Bridgeable: Yes Channels - Available: 4 Box Dimensions: 4"H x 11"W x 14"L WT: 6.5 lbs UPC: 006066234731