Description: Crunch Ground Pounder with QTD Technology delivers 1000 watts to subwoofers and includes built-in electronic crossovers. Features & Benefits: Low Noise Preamplifier Circuit: Maximum low voltage signal from the source unit comes into the amplifier through a low voltage circuit which delivers minimal distortion through the amplification process. RCA Inputs: Highest sound quality connection with quality RCA materials helps prevent interference and minimize distortion in the signal path. High Level Inputs: Easily tie into OEM audio systems that do not offer RCA output to maximize after market amplifier power. Operation Mode: Four Channel Stereo, Dual Stereo Bridged, Stereo + Bridged Mono, Dual Bridged Mono Crossover Type: Variable Electronic 12dB Per Octave Electronic Equalizer: Fully Adjustable 12dB Crossovers Class / Topology: Class A/B: High sound quality circuit that allows POWER DRIVE to develop high levels of power with minimal distortion. Output Device Technology: Exclusive Crunch SPEED-FET MOSFET components maximize power efficiency while improving sound quality and minimizing distortion. Heat Sink: QTD Technology Aluminum: Quick Thermal Dispersion Technology assures additional mass in the aluminum heat sink keeps the amplifier running cool with nearly undetectable distortions during normal music listening. Power Supply: High energy Pulse Width Modulated Power Supply delivers power with minimal impact on the electrical system. Output Connections: Nickel Plated Brass Connection with terminals allow for secure connection while resisting corrosion. Connection Type: Screw Down Connectors: Easy access for hand tool allowing a quick and secure connection. LED System Protection Circuitry Diagnostics: Monitor overload and speaker short protection with lighted indicators on the amplifier end panel. Details & Specs: Weight: 6.25 lbs Dimensions: 10 × 8 × 2.375 in Color: Black/Red Model Replaced: PD-1000.4 Warranty: 1 Year Compatible Vehicles: Universal Amp Class: Class A/B Amp Total Channels: 4 Amp Max Power (watts): 1000 Amp Power @ 2 Ohms (ch x watts): 4 x 250 Amp Power @ 4 Ohms (ch x watts): 4 x 125 Amp Mono Bridged @ 4 Ohms (ch x watts): 2 x 500 Amp Crossover: Variable Electronic 12dB Per Octave Amp Tone Control / Parametric EQ: Built-in Bass Control Amp Bass Boost: Switchable: 0/+6/+12dB Amp Variable Voltage: 0.2-9V Amp Frequency Response: 10Hz-22kHz Amp Speaker Level Audio Inputs: Yes Amp Power Terminal 12v/GND: 4 AWG Amp Speaker Terminal Wire Gauge: 12 AWG Amp Fusing: 30A Proposition 65 Notice WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov