Sundown Audio SFB-600D 600 Watt 1 Channel Amplifier 4 Channel 380 Watts RMS @ 4-Ohms

380 Watts RMS @ 4-Ohms

2-6V High Level Input No Selectable X-Over LPF Fixed X-Over Filter Range 50-220Hz    Bass Boost Range 0/6/12dB Bass Boost Frequency 45Hz Infrasonic Filter 10-50Hz Phase Selector No FEATURES   Amplifier Class Digital Amplifier Type Monoblock Subwoofer Number of Channels 1 Minimum Impedance 1 ohm Led Indicator clipping/protect/power Power Input Terminal Size 4ga Fuse Size 60A Remote Level Control Yes / Dash Mount Cooling Fan No Voltmeter  No Thermal Protection Yes Over-Load Protection Yes DC Output Protection Yes Short Circuit Output Protection Yes Voltage Input Protection Yes <9 / >16 Volts Clipping Protection  Yes Body Color / Finish Black Aluminum Brush MEASUREMENT   Overall Length 8

Frequency Response 40 Hz – 20 kHz

and even competition use for those requiring high linearity and extreme power handling

Sundown Audio SFB-600D 600 Watt 1 Channel Amplifier 4 Channel 380 Watts RMS @ 4-OhmsFeatures 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 1 ohm Mono RMS 600W 2 ohm Mono RMS 350W 4 ohm Mono RMS 250W Recommended Fuse Rating 60A Low Pass Filter (Variable) 80Hz