Recoil engineered the DI600.1 Class D mono-block subwoofer amplifier to be dominant in both power and reliability. The DI600.1D is 2-ohm stable and utilizes a wide array premium components that make it extremely powerful and reliable - such as its high speed MOSFET power supply and advanced PCB board layout. Youll have full reign over your amplifier with the built-in user control panel, featuring a bass EQ, and variable adjustment tunings for gain level, low-pass filter, and subsonic filter.