Car Amp 8-channel Damage-free Installation

The bose amplifier removed from the original mazda car has 4 inputs and 8 outputs. it is in very good condition and the plugs are all matched. no protocol, can be used in any car, 4-channel high-level input (that is, car speaker wire input) and 8-channel output. dimensions 13.9x13x 4.5cm , you can buy a lossless cable and plug it in with your eyes closed for lossless installation; you can also use it by comparing the wiring diagram