Dual Sigma Drive This advanced negative feedback circuit improves damping factor and increases accuracy and sound quality. When a signal is passed to a subwoofer, like a 50Hz note, the speaker will move and create the note. However, because the speaker has mass and a suspension, it won't stop moving once it's in motion. This extra movement (sound) creates a type of distortion that's not part of the original signal. The negative feedback circuit senses this unwanted movement and sends out an opposite pulse to stop the speaker like an electronic brake. Small Size Big Power The KAC-D5101 is small in size but with its tremendous sound output, it is extremely versatile. It can be installed in vehicles where space is limited and is perfect for vehicle owners who don't want to sacrifice cargo room or who prefer hidden installations. | Number of Channels 1 Class D Peak Power Rating (Watts) 1000 RMS Power Rating (Watts x Channels) - 4 Ohms 300 x 1 RMS Power Rating (Watts x Channels) - 2 Ohms 50 x 1 RMS Power Rating (Watts x Channels) - 1 Ohm N/A RMS Power Rating - Bridged N/A Minimum Impedance Unbridged (Ohms) 2 Minimum Impedance Bridged (Ohms) N/A THD at Rated RMS Power Bulit-in Crossover - Low Pass Yes Built-in Crossover - High Pass N/A High Pass Crossover Frequency (Hz) N/A Low Pass Crossover Frequency (Hz) 50-200hz Signal-to-Noise Ratio Bass Boost 0-18dB Bass Remote Included No Fuse Rating 60A CEA-2006 Compliant Yes Maximum Power Wire Gauge Size 8 gauge Warranty 1 Year