Adding a sub to 2015 4RUNNER

Looking for some advice from those who have added the sub in the back of a 4RUNNER when it was not factory installed, which is the case I’m in. I’m not sure what speaker system came with it but I will say the speakers sounded way better with factory head unit, and before I installed a boss double din in the dash. Anyway, looking to bypass main speakers and get a little bump from a sub (and amp) in the back. I am aware that some sub require some fabrication to install in the factory location. Any suggestions would be great! Thank y’all

 

I got this for the back of mine. I paid a shop to wire it but if I recall they only charged me like 100 bucks.

Rockford Fosgate P300-12 Punch 300 Watt Powered Loaded 12-Inch Subwoofer Enclosure https://www.amazon.com/dp/B007AQ2W6W

 

The stock speakers probably suck. I would replace them first before worrying about a sub. I just swapped my stock oem speakers in my 2022. The speaker magnets are tiny compared to aftermarket speakers. I am getting an amp installed Friday. I did that first to improve the sound. You could always add a sub later on. There are underseat or enclosure options out there you can add later.

 

Stock speakers are shit. If you amp you may wanna consider one with a DSP so you can actually make some tweaks and really improve on the sound. There isn’t much room for adjustment on the factory HU.
After that an enclosure makes a huge difference filling in the sound.
I used this but have since gone a different route,was actually thinking of posting it in the for sale here as well. Good luck!
https://philadelphia.craigslist.org/ele/d/lansdale-audison-apbx10-as2-powered/7436870287.html