Class D Amplifier Gain Control With "Gain Match" LED Indicator FIT2 (Fail-safe Integration Technology) Circuitry Variable 24dB Crossover DSP-Controlled Preamp KickEQ 6dB Variable Bass Boost ABYC/NMMA-Compliant Power Terminals Conformal-Coated Circuit Boards Easy Access to Settings behind Gasket-Sealed Cover Panel Black Anodized Aluminum Chassis Top-Mounted, Teal LED Light Pipe Stainless-Steel Mounting Hardware Included KICKER 48KXMA5004 500 Watt 4-Channel Marine Boat Amplifier Class D Amp KXMA500.4