11ZX2500.1 (ZX2500.1) - Kicker 2500W RMS Class D Monoblock ZX Series Amplifier ZX Series Class D Monoblock Car Amplifier High efficiency MOSFET power supply LED power and protection indicators FIT (Fail-Safe Integration Technology) utilizes differential inputs to reject noise and electrical interference for the quietest operation possible and ultimate audio clarity Tuned Bass EQ (0-18 dB bass boost at 40 Hz)