Precision Power PPI4240 specs

1.Adjust all amplifier input gain controls to just above minimum sensitivity (fully counterclockwise).

2.Using the cleanest source (CD), with music playing turn up the head unit until you can hear the music begin to distort. Now turn it down a bit until you cannot hear the distortion.

3.Increase the Amplifier gain (clockwise) until the onset of audible distortion. Then decrease the gain to the point just before the distortion starts. This setting minimizes background noise and prevents overload.

4.Repeat step 3 for any remaining amplifiers in the system.

Your new PPI amplifier has one two-way built-in crossover. By using the ‘X-OVER’ switch on your amplifiers endplate, you are able to select either full range, high pass or low pass (FULL/HPF/LPF) for your ‘Speaker Output’. Using the ‘X-OVER FREQ’ control select the desired crossover frequency, 20Hz to 5kHz. Now it’s time to set the ‘OUTPUT X-OVER’ as FULL/HPF/LPF. The ‘OUTPUT’ will be whatever frequency you selected on the ‘X-OVER FREQ’ and either FULL/HPF/LPF depending on where you set the ‘OUTPUT X-OVER’.