Alphasonik ALPHA 1K Alpha Series Class D Monoblock 1000 Watts 4 Ohms Full Range AmplifierWe are proud to introduce the ALPHA Series. They are designed and engineered in the USA in order to bring the most efficient signal-to-noise ratio in the market. As its name says, these are our most powerful and size-efficient amplifiers. The small and digital technology design makes them one of the most desirable yet in our lineup to fulfill this new trend of car audio enthusiasts.Specification:100dB (+/-3dB)• Total Harmonic Distortion: 1.0%• Bass Boost: 0 - 12dB• Variable Bass EQ: 35Hz - 70Hz• Variable Input Sensitivity (200mV - 6V)• Variable Low-Pass Crossover: 50Hz - 20kHz• Variable High-Pass Crossover: 15Hz - 2kHz• 4-Way Protection Circuitry: Thermal, Short Circuit, Overload, and DC Offset• M-Spec Double-Sided Glass Epoxy Circuit Board• Nickel-Plated Terminal Blocks• Remote Bass Knob