Drive Your Subwoofer with Authority! Looking for good accurate bass but don’t need to be heard from a mile away? The RX2250.1 is a Class A/B Monoblock amplifier that drives a clean 250 watts of power with efficiency to your subwoofer. When your jam comes on, sometimes it calls for taking your bass up to the next level; and with RX2250.1’s bass knob you can. Installed near the driver, simply turn it up and enjoy.