Heritage ZAPCO PX paragraphic Equalizer electronic crossover Old School RARE
Zapco PX. The PX was the first parametric EQ for the car. With high voltage inputs and outputs, an 18dB electronic crossover, 4 parametric EQ bands, and a noise free remote power supply, the PX became the competition EQ for the 1980s
The ZAPCO model PX is a programmable four-band equalizer and 12dB per octave electronic crossover housed in an attractive anodized aluminum chassis designed to be mounted either in- dash or under-dash. The PX is comprised of two pieces: the PX Main containing all of the audio circuitry and PSi, an isolated power supply that provides the audio circuitry with + or - 15V supply rails.
A master volume control and four filter control knobs are readily accessible on the PX front panel. The filter controls have a maximum boost or cut of 18dB at either extreme of rotation. Independent left and right channel INPUT GAIN adjustments are made via access holes in the lower left hand corner of the front panel. A main power ON indicator and three OVERLOAD indicators are provided to aid in system troubleshooting and calibration.
Signal inputs and outputs are made to the rear of the unit by way of gold plated RCA connectors. The back panel also contains the controls for the electronic crossover. The crossover frequency is continuously variable in a range of 70Hz to 1.6 kHz by using the CROSSOVER FREQUENCY control pot. Separate LOW / HIGH PASS OUTPUT LEVEL controls are provided for system balancing. An auxiliary FULL RANGE output is provided for possible use with full range satellites or 600 ohm earphone. The modular “phone” DC POWER INPUT connector at the upper right hand corner of the back plate is used to connect the PX Main to the external power supply, the PSi.
The power supply, model PSi, is a highly efficient and compact switching power supply that provides the PX Main with all necessary operating voltages. An extra modular output connector is provided for use with an additional PX. A fifteen foot interconnecting cable is supplied to allow for remote mounting of the supply. The PSi is used to trigger on/off operation of the PX Main. A plug-in barrier strip is used to terminate the necessary +12V, GND and TURN ON connections to the unit.
fully working tested all inputs and outputs are working. sold as-is no return please check all the pictures for the item details
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