I finished all (six) speaker upgrades on my 2015 Camry SE. The installation took me about 8 hours totally. This tutorial should work for all 2012-2015 Camry model as well. I will copy some of the other TN posts and Youtube videos here to make it more complete. Credits all go to the OP. My thoughts about this upgrade is at the end.
ENJOY!
Added: Simple AMP Installation on post 9
First, all stuffs I purchased. These items are very standard, so I will not provide links.
From Walmart.com site to store
Pioneer TSA878 3.5" 2-Way Speaker (Dash speaker)
Pioneer TS-A1685R 6.5" 4-Way Speaker (Door speaker)
Pioneer TS-A6975R 6" x 9" 3-Way Speaker (Rear speaker)
Dap 00694 Silicone Rubber Auto/Marine Sealant (For speaker/adapter sealing, you can ignore this if you don't want to seal speaker to the adapter, the screw connection is strong enough)
From Ebay:
Metra 72-8104 Speaker Wire Harness Adapter x2 (Connects door&rear speakers to stock connector)
Metra 82-8150 Speaker Adapter (Door speaker adapter)
Metra 81-4300 Universal 5.25" or 6.5" Car Speaker Baffles (For door speaker water proof)
Install Bay BB99 400hz Bass Blockers (For dash speaker)
10sqft GTMAT PRO 50mil 4" Width Audio Deadener (Door and rear dash sound deadening)
12 pc Auto Pry Tool Kit
From car-speaker-adapters.com:
Rear speaker adapter from this link: http://www.car-speaker-adapters.com/items.php?id=SAK054
From ACE store:
Heat shrink butt wire connectors
Wire terminal connectors, 12-16 male, 16-22 female, because some wire are thinner, the plug are 0.25 inch in width
Electric tape
Tools you need:
10mm Socket wrench
Wire Crimper
Pliers and lighter for the butt connectors
Auto Pry Tool
All speakers I used, no fitting issue.
For dash speaker:
The dash grill is very easy to pop out, the are two clips at the steering wheel side, just pop out and slide them toward the steering wheel. Thanks to OmoPastor, here is a more detailed post about dash speaker installation on 2015 Camry. I will just borrow one pic:
http://www.toyotanation.com/forum/3...um/310-7th-generation-2012/1020786-2015-camry-hid-led-lighting-upgrades-12.html
My installation: use the connectors that come with the speaker, here is the connection map.
Speaker --> stock connector --> Butt connector --> Bass blocker --> 16-22 Female wire terminal --> 12-16 male wire terminal
For the negative input, you just pass the bass blocker, here is my setup.
For the door speaker:
The door panel removal is basically same to the 2012-2014 Camry, Here is the video, I will mention the difference after you watched the video
https://www.youtube.com/watch?v=YLGD2l7GicM
1.On the hinge side of the door, remove this small piece first, no need to remove the whole corner panel as show in the video.
2.Remove the cover behind the lock handle, the window switch panel and the arm rest as in the video
3. start from the bottom at the hinge side pull out all the clips. One thing to notice is shown in the picture, You can see one clip there from the arm rest hole. Use some tools to pop out the clip there, that part is very weak, make sure your force is applied to the clip directly so don't break the clip holder or rip your door panel in two parts.:laugh:
The weak clip holder on the door panel
Then everything else just follow the video.
For the front speaker assembly, I put them together as in the following pics
For the rear speaker:
Here is the video:
https://www.youtube.com/watch?v=Op5ZBOB7pZQ&feature=youtu.be
and Another helpful TN post by dyapanis:
http://www.toyotanation.com/forum/310-7th-generation-2012/954665-rear-speakers-installation.html
The removal procedure is same as show in the video, I just post some pictures of the removed part so you know where to apply force. The Driver side pillar and two side panel pics: Notice the red clip, you need to open some gap then slide your hand (or tool, I have a small hand) in to apply a large amount of force on them directly to pop them out. then slide them to the front of the car because you see there is another small piece at the sharp corner which lock it into the rear dash.
Driver side pillar:
Driver side panel:
Passager side panel
then remove the center break light, Push it backward then slide to the right, disconnect it from the connector, here is the parts:
After the break light, is the rear dash, fold your rear seat, from the seat side, lift the rear dash a little bit, then use your hand again to apply force directly to the three white clips as shown in the following figures, they are very easy to pop out, If you apply force directly to the dash, you may end up rip the white clip off from the dash as said in the aforementioned post, but you can glue it back on anyway:
Three white clips:
Close up of the clip
After remove the dash you can upgrade your rear speaker:
After the upgrades:
Like everyone else here upgraded their speaker, the first thing you notice is much better high and mid range sounds, you do lost some bass, but those are terrible vague bass comes with the stock speaker and it somewhat covered up your highs and mids. By setting the bass in HU to the max, you get about 50% bass back.
After using this setup for a while, I am still not happy with the missing bass. The bass I got is kind of like the strike on a tight drum instead of a boomy sound, this may indicate the speaker is lacking power, so I decided to add an amp to the system. The information is on post 9
If you don't want add amp, just replace the speakers is OK, the treble and mid range sound quality is not that bad compared with my friend's harman/kardon speaker on a Mini Countryman. But if you want good quality highs and mids, and don't want to lose all the bass, the best option would be just replace the front speaker.
Added: Simple AMP Installation on post 9
First, all stuffs I purchased. These items are very standard, so I will not provide links.
From Walmart.com site to store
Pioneer TSA878 3.5" 2-Way Speaker (Dash speaker)
Pioneer TS-A1685R 6.5" 4-Way Speaker (Door speaker)
Pioneer TS-A6975R 6" x 9" 3-Way Speaker (Rear speaker)
Dap 00694 Silicone Rubber Auto/Marine Sealant (For speaker/adapter sealing, you can ignore this if you don't want to seal speaker to the adapter, the screw connection is strong enough)
From Ebay:
Metra 72-8104 Speaker Wire Harness Adapter x2 (Connects door&rear speakers to stock connector)
Metra 82-8150 Speaker Adapter (Door speaker adapter)
Metra 81-4300 Universal 5.25" or 6.5" Car Speaker Baffles (For door speaker water proof)
Install Bay BB99 400hz Bass Blockers (For dash speaker)
10sqft GTMAT PRO 50mil 4" Width Audio Deadener (Door and rear dash sound deadening)
12 pc Auto Pry Tool Kit
From car-speaker-adapters.com:
Rear speaker adapter from this link: http://www.car-speaker-adapters.com/items.php?id=SAK054
From ACE store:
Heat shrink butt wire connectors
Wire terminal connectors, 12-16 male, 16-22 female, because some wire are thinner, the plug are 0.25 inch in width
Electric tape
Tools you need:
10mm Socket wrench
Wire Crimper
Pliers and lighter for the butt connectors
Auto Pry Tool
All speakers I used, no fitting issue.

For dash speaker:
The dash grill is very easy to pop out, the are two clips at the steering wheel side, just pop out and slide them toward the steering wheel. Thanks to OmoPastor, here is a more detailed post about dash speaker installation on 2015 Camry. I will just borrow one pic:
http://www.toyotanation.com/forum/3...um/310-7th-generation-2012/1020786-2015-camry-hid-led-lighting-upgrades-12.html

My installation: use the connectors that come with the speaker, here is the connection map.
Speaker --> stock connector --> Butt connector --> Bass blocker --> 16-22 Female wire terminal --> 12-16 male wire terminal
For the negative input, you just pass the bass blocker, here is my setup.

For the door speaker:
The door panel removal is basically same to the 2012-2014 Camry, Here is the video, I will mention the difference after you watched the video
https://www.youtube.com/watch?v=YLGD2l7GicM
1.On the hinge side of the door, remove this small piece first, no need to remove the whole corner panel as show in the video.

2.Remove the cover behind the lock handle, the window switch panel and the arm rest as in the video
3. start from the bottom at the hinge side pull out all the clips. One thing to notice is shown in the picture, You can see one clip there from the arm rest hole. Use some tools to pop out the clip there, that part is very weak, make sure your force is applied to the clip directly so don't break the clip holder or rip your door panel in two parts.:laugh:

The weak clip holder on the door panel


Then everything else just follow the video.
For the front speaker assembly, I put them together as in the following pics













For the rear speaker:
Here is the video:
https://www.youtube.com/watch?v=Op5ZBOB7pZQ&feature=youtu.be
and Another helpful TN post by dyapanis:
http://www.toyotanation.com/forum/310-7th-generation-2012/954665-rear-speakers-installation.html
The removal procedure is same as show in the video, I just post some pictures of the removed part so you know where to apply force. The Driver side pillar and two side panel pics: Notice the red clip, you need to open some gap then slide your hand (or tool, I have a small hand) in to apply a large amount of force on them directly to pop them out. then slide them to the front of the car because you see there is another small piece at the sharp corner which lock it into the rear dash.
Driver side pillar:

Driver side panel:

Passager side panel

then remove the center break light, Push it backward then slide to the right, disconnect it from the connector, here is the parts:


After the break light, is the rear dash, fold your rear seat, from the seat side, lift the rear dash a little bit, then use your hand again to apply force directly to the three white clips as shown in the following figures, they are very easy to pop out, If you apply force directly to the dash, you may end up rip the white clip off from the dash as said in the aforementioned post, but you can glue it back on anyway:
Three white clips:

Close up of the clip

After remove the dash you can upgrade your rear speaker:


After the upgrades:
Like everyone else here upgraded their speaker, the first thing you notice is much better high and mid range sounds, you do lost some bass, but those are terrible vague bass comes with the stock speaker and it somewhat covered up your highs and mids. By setting the bass in HU to the max, you get about 50% bass back.
After using this setup for a while, I am still not happy with the missing bass. The bass I got is kind of like the strike on a tight drum instead of a boomy sound, this may indicate the speaker is lacking power, so I decided to add an amp to the system. The information is on post 9
If you don't want add amp, just replace the speakers is OK, the treble and mid range sound quality is not that bad compared with my friend's harman/kardon speaker on a Mini Countryman. But if you want good quality highs and mids, and don't want to lose all the bass, the best option would be just replace the front speaker.