The R1 900.6 marine-grade amplifier, made by Roswell, is everything your boats audio system has always wanted. Utilizing a 6-channel Class-D design that puts out 100 watts RMS per channel at 4, these amps are perfect for powering your R1 8" and R1 6.5" Marine Speaker setup. It features calibrated crossover controls, differential RCA inputs for maximum noise rejection, fully conformal-coated PCB&';s, and nickel-plated marine-grade wire terminals. Each sold separately Continuous Power (RMS) 4: 100W x 62: 165W x 6Bridged 4: 300W x 3Frequency Response 10-25 kHzInput Sensitivity 0.2 - 10.0VHPF (High Pass Filter) 30Hz - 300HzLPF (Low Pass Filter) 30Hz - 300HzBass EQ 0 ~18dB @ 45HzDimensions Inches: 1.90 x 7.0625 x 13.67Centimeters: 4.83 x 17.94 x 34.74