Replaced the stock 6 inch crap subwoofer in the stock enclosure. Basically cutting the ring to fit the 8 inch subwoofer and then drilling in new holes to secure the sub into the housing. I had to cut a piece of the plastic housing behind the subwoofer to fully close the stock enclosure.

I can tell the difference between the stock and after subwoofer, using the stock amp still.


https://imgur.com/a/DJpWQ09

 

Nice work!

So, I can't see from the picture you showed, how it all looks with the stock mesh cover, do you mind sharing a picture with the trunk space all buttoned up?

Also, few questions:

1. Are you using stock wiring from the headunit to the subwoofer?
2. if you are using an amp, what brand is it and where did you install it.
3. Does your CT have the stock head unit with dashboard navigation display?

This would definitely be a nice upgrade, but for me an amp would be the first upgrade to my audio system, then upgrading all the individual speakers except for the trunk, and then determing whether I would need the 8inch Subwoofer.

 

I have the premium audio option in my car. 10 speakers with the 8 channel amp.

I have replaced the front door 6x9, 3.5 dash speakers and the sub woofer.

1. Using stock wiring
2. Stock amp
3. Stock headunit with navigation

I can hear a difference for sure with the upgraded speakers and subwoofer. Would defintely be better with an aftermarket amp.