Does anyone use the Incartec Technologies amplifier bypass cable? They have no idea what they are selling and I am trying to determine which speakers are being driven by which of the four outputs from my new radio.

 

To answer my own question-

The "amplifier Bypass cable" is a wiring and filter combination that accepts regular 4 channel output from a newer radio head unit ( front left/right + back left/right ) and terminates in a six channel connector. The connector marries the existing connector in the trunk for the harness that feeds the eight existing Alpine speakers. The two pillar speakers and the two dash speakers are in parallel, and are fed by the bypass cables high pass filter(s). The door speakers are fed by the bypass cable's band pass filter. The rear speakers are fed by the bypass cable's low pass filters. The length of the cable is sufficient to reach from the center dash to the trunk vie the center console. I will report on it's effectiveness once I get it all installed. The reason I could never get a technically clear explanation of the product is because the tech folks at the vendor's facility were sent home to avoid COVID exposure. Apparently sales personnel are expendable, but profits are not.

 

I have very recently installed this cable as well and it seems to work quite well. I did not run it all the way from the head unit though as I have installed an amp. It did work surprisingly well.