JFA J4 Pro - 4 Way Dynamic Crossover and Equalizer Multi-Band Sound Processor
JFA features the J4 processor. Its main innovation is the reading of the input and output audio levels in a graphic display. This feature allows the installer to make a perfect gain adjustment of the amplifiers, simulating the use of an oscilloscope.
The display has updated the simultaneous display of the variation of the audio, including storing the peaks (hold peaks), which favors the adjustment of the limiter function of the processor itself.
In addition to the graphical display, the J4 comes with a setting to limit input audio with clipp indicator, interactive adjustment screens, 15-band semi-parametric master equalizer and individual parametric equalizer on each track.
In audio performance, JFA has added a filter that generates a more "aggressive and steady" bass, and a metal enclosure that protects against electromagnetic interference, and noise at the outputs.
|Country of Manufacture||Brazil|
|Specs and Features||
In Channels: 2
Exit Channels: 4
Frequency response: 20Hz to 20kHz
Semi-parametric Equalizer Master: 15 bands -10 to + 10dB
Parametric equalizer per channel: 1 band -12 to + 12dB
DSP filter, 24-bit hi-pass and Low-pass: 20Hz to 20KHz, (off / 6/12/18/24/36 and 48dB / 8 °)
Total Harmonic Distortion (THD): 0.002% at 1kHz
Signal to Noise Ratio 20Hz to 30kHz:> 90dB
Phase: 0 and 180 °
Delay: 0 to 287cm
Maximum input level: 3.8Vpp / 10KO
Maximum output level: 15Vpp / 470O
Bar Graph: 0 to 6Vpp with "hold spikes"
Dimensions in centimeters: (Width x Height x Depth): 20.2 x 10.3 x 4.3