Roswell R1 650.4 Marine Amplifier | 2022 | Pre-Order

by Roswell


The R1 650.4 marine-grade amplifier, made by Roswell, is everything your boats audio system has always wanted. These stackable amplifiers utilize a 4-channel Class-D design, that puts out 100 watts RMS per channel at 4Ω, and are perfect for powering your R1 6.5 in-boat speaker setup.  Easily bridge & 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 PCB’s and nickel-plated marine-grade wire terminals to ensure their quality.


  • Ch 1-2 calibrated crossover (FULL/HPF/LPF)
  • Bridgeable 2-channel design
  • 2 Ohm Stable at 165 watts per channel
  • Lit logo power indicator lets you know your amp is receiving power
  • Switchable Differential RCA inputs minimize interference and induced noise
  • Space-saving Stackable Design
  • Marine-grade durability
  • High-Efficiency Class-D Topology
  • Conformal-coated PCBs
  • Nickel-plated wire terminals
Continuous Power (RMS)

4Ω: 100W x 4 2Ω: 165W x 4


4Ω: 300W x 2

Frequency Response

10-25 kHz

Input Sensitivity

0.2 – 10.0V

HPF (High Pass Filter)

30Hz – 300Hz

LPF (Low Pass Filter)

30Hz – 300Hz

Bass EQ

0 ~18dB @ 45Hz


Inches: 1.90 x 7.0625 x 11.125 Centimeters: 4.83 x 17.94 x 28.26