SUNDOWN AUDIO SFB-1000D | MONOBLOCK CLASS D AMPLIFIER FEATURES: Digital Class-D Mono Block Amplifier Dual MOS-FET PWM Power Supply 1 Ohm Stable Load 12 dB/Octave Variable Low Pass Filter 12 dB/Octave Variable High Pass Filter 9 dB/Octave Variable Bass Boost 4 Way Protection Ciruit (Thermal, Voltage, Speaker Short, DC Offset) Wired Remote Control with Clipping Indicator SPECIFICATIONS (Tested @ 14.4v) 1 ohm Mono RMS: 1000W 2 ohm Mono RMS: 850W 4 ohm Mono RMS: 500W Recommended Fuse Rating: 100A Low Pass Filter (Variable): 80Hz-20kHz High Pass Filter (Variable): 15Hz-1kHz Bass Boost @ 50Hz: 0-12dB Input Sensitivity: 5V Max S/N Ratio: 100dB Working Voltage: 10.5v-15.5v Dimensions: 7.25 x 5.75 x 2.50