Check the listing for details. Expert PX1 Connect R-Line Bluetooth DSP Car Audio Processor Equalizer. Condition: New, Made in Brazil. Listed at 89.99 USD. The Expert Eletronics PX1 Connect R-Line Bluetooth DSP Car Audio Processor Equalizer is a high-quality audio device designed for car audio systems. Made in Brazil, this Bluetooth equalizer allows for easy connection and control of audio signals in your vehicle. The model PX1 Connect from Expert Eletronics offers superior sound processing capabilities, making it a reliable choice for enhancing your car audio experience.