JL Audio A1800 - Manuals

POWER CONNECTIONS Before installing the amplifier, disconnect the negative (ground) wire from the vehicle’s battery. This will prevent accidental damage to the system, the vehicle and your body during installation. The A1800’s “ +12VDC ” and “ Ground ” connections are designed to accept 4 AWG power ...

AMPLIFIER CONTROLS 1) “Input Sens.”: Once the appropriate “ Input Voltage ” range has been selected, the control labeled “ Input Sens. ” located in the “ Amplifier Controls ” section can be used to match the source unit’s output voltage to the input stage of the amplifier for maximum clean output. R...

The preamp output signal is not affected by the “ Bass Boost ” processing selected for the amplifier or by any crossover filter selected (if the input signal is full-range, the preamp output will be full-range). The signal level of the “ Preamp Output ” is line-level (low voltage), regardless of the...