Planet Audio TR4000.1D Class D Car Amplifier - 4000 Watts, 1 Ohm Stable, Digital, Monoblock, Mosfet Power Supply, Great for Subwoofers Description Planet audio TR4000.1D Class D car amplifier - 4000 Watts, 1 ohm stable, digital, monoblock, MOSFET power supply, great for subwoofers Features: Power - 4000 Watts Max x 1 @1-Ohm, 2000 Watts Max x 1 @2-Ohms Class D - Power loss is significantly reduced making the amplifier highly efficient. Excess energy is stored until its needed instead of being converted into heat. Reduction in size/weight, reduced power waste, smaller heat sink, compact circuitry Mosfet Power Supply - A MOSFET is an electrical switch that allows the flow of electrical current. It controls the output voltage and current precisely by removing the output current sensing loss & eliminating all secondary feedback circuitry 1 Ohm Stable - Able to continuously power loads of 1 Ohm without encountering difficulties such as overheating. Typically made to power up subwoofers that demand the heavier power load requirements to be able to perform the way they were made to Strapping Capable - You are able to strap two TR4000.1D amplifiers and double the power that is being sent to your subwoofer(s). You now have the ability to connect more subwoofers to take advantage of the extra power Variable Subsonic Filter - To prevent your subwoofer(s) from bottoming out, the variable subsonic filter filters out frequencies below the subwoofer(s) specified low frequency limits and allows the driver to reach a maximum safe excursion Variable Low-Pass Crossover - Subwoofers reproduce sound based on a number of different low-range frequencies. You can set exact sound specifications for the bass frequency reproduction Specs - Dimension:15.3 x 9.75 x 2.13, Weight: 10.8 lbs. Product Details: Product Dimensions: 15.3 x 9.75 x 2.13 inches Item Weight: 11.38 pounds Item model number: TR4000.1D Is Discontinued By Manufacturer: No Connectivity technologies: RCA Special features: Class D, MOSFET Power Supply Other display features: Wireless Whats in the box: Remote Subwoofer Control, Instruction Manual Manufacturer: Planet Audio Date First Available: January 27, 2017