Soundstream PN1.450D 450W Monoblock Picasso Nano Series Class D Amplifier Picasso Nano Series Monoblock Class D Car Amplifier RMS Power Rating: 4 ohms: 260 watts x 1 chan. / 2 ohms: 450 watts x 1 chan. Max power output: 450 watts x 1 chan. Pulse Width Modulated MOSFET power supply Variable Bass Boost (0 to +12 dB bass boost at 45 Hz) & Variable low-pass filter (50-250 Hz, 24 dB/octave)