Hifonics Colossus Mount Olympus Series 2-Channel Car Amplifier (Colossus 6.5K) Crossover / Signal Shaping: Accu-Cross & XCurve (X1/X10) - Accu-Cross crossovers allow for complete control of the signal directing to all speakers. XCurve allows for chosen frequencies to be as stated (X1) or multiplied by 10. Equalizer: ParaQ - Parametric Bass EQ with adjustments: Boost (0-10dB) Width (Narrow-Wide (On Center) Center Frequency (30Hz - 100Hz) Class / Topology: Dual Ultra D-Class - Ultra D-Class technology is at the very nerve center of Colossus. The proprietary Ultra-D design uses high-speed microprocessors with proprietary D/A conversion algorithms to efficiently control the dual mono current consumption. At very high listening levels. Hifonics Ultra D-Class results in lower distortion, higher current efficiencies and less heat than conventional D-Class amplifier designs. Output Devices Technology: Ultra-Fi MOSFET - The Ultra-Fi MOSFET is designed for music production vs just electronics output power. It produces very musical high power with high efficiency for cooling and minimal distortion. Heat Sink: Aluminum - Heavy duty aluminum alloy heat-sink efficiently moves heat from the MOSFET where it can be cooled without the need for fans Power Supply: Twin turbo - The Twin Turbo Coil PS is a Pulse Width Modulated power supply keeps voltage constant through the Ultra-Fi output devices. Bass Remote: Diagnostic Bass Remote Included - The Hifonics SUPER AMPS include a specialized Bass Remote that allows remote adjustment of the gain for the ParaQ bass equalization feature. Also critical is the Diagnostic ability of viewing the amplifier status on the L.E.D's of the remote Inputs: Tiffany Style RCA Connectors - Audiophile signal quality and maximum signal throughput with minimum distortion and maximum external noise rejection. Operation Mode: One Channel (Mono) - Mono mode is intended for subwoofers only. Output Connections: Nickel-Plated - High temperature impact resistant with hex screw terminals that allow for secure connections and is erosion resistant