[Sam00row]

Looking to add a sub and amp to the stock head unit, I have tapped in to the rear speakers, but now the sub just acts as a massive speaker, what am I doing wrong ? Do I need to bypass the Factory amp? (Bose system)....T I A

 

[TalonTsi90]

Did you search? im gonna say no, cause this is brought up about once a week.

First off, you dont tap off the rear speakers, they are crossed over very high in the amp since they are small. Secondly, you didnt put or use a crossover on the sub amp or you wouldnt hear high frequencies.

Yes, you tap off the Bose amp input, read this, scroll down to "Sweet 4 Channel glory" and youll find the wires in the plug you need. You can then tap off the rear INPUTS to the amp.

(1) 2014-2018* Mazda 6 (and 2014-2016 Mazda 3) w/BOSE Full System Breakdown/Analysis | Mazda 6 Forums (mazda6club.com)

 

[platoon2063]

As Talon mentioned; just tap the inputs not the actual speaker wires. Make sure the amp's low pass crossover is set. Depending on the amp and subwoofer you are using, I would start around 80hz.