JFA presents the J4 processor. Its main innovation is the reading of the audio levels of input and output on a graphic display. This feature allows the installer to make a perfect adjustment of amplifier gains, simulating the use of an oscilloscope. The display has a screen update simultaneously to the audio variation, including storing the peaks ( hold peaks), which favors the adjustment of the limiter function of the processor itself. Features Function Oscilloscope. Voltmeter on the graphic screen. Adjusting the maximum of the input audio. Indication of excess input level. Specifications Weight: 15 lbs.