Compact size The JBL Club A754 amplifier features a low-profile chassis and a small overall footprint to fit in more vehicles where available space is limited. High and low level input Speaker-level and low-level inputs allow the Club A754 to integrate with both aftermarket and factory car stereo systems. Variable crossover Unlike many amplifiers available at similar prices, the JBL Club A754 features variable electronic crossovers for precise system tuning and performance. Low noise and distortion The Club A754 has been engineered using Balanced Differential Inputs to ensure low noise and distortion even at high output levels. This also makes it far less susceptible to line induced engine noise. Input Level Control When low-level inputs are used, this control adjusts the input sensitivity between 200mVrms and 2.0 Vrms. When high-level inputs are used, this control adjusts the input sensitivity between 2Vrms and 20Vrms. Full on-board protection On-board circuitry protects the Club A754 from shorts, high-temperature, overvoltage and undervoltage. An LED indicator is provided to let you know when one of these conditions exists. Preamp Outputs Using multiple amplifiers, the Club A754 has full range preamp outputs allowing you to feed an additional amplifier without using splitters. Class H amp technology The JBL Club A754 4 channels subwoofer amplifier delivers 400-Watts RMS using a Class H amplifier design to ensure high output and minimum current draw. Turn-on mode This switch changes DC to REM to adapt with low-level signals or high-level signals, this is especially helpful as part of remote turn-on lead of your installation more choice. A selectable “Turn-on mode” can protect battery to avoid current drain, when you don’t expect to turn on your amplifier.