I read thru the other non-JBL thread and learned a ton and even asked a few questions but I didn't want to hijack that for my own project so I'll start this one here. I will be keeping the stock head unit and understand it's limitations when it comes to sound so some of the suggestions below may not be worth the hassle if they won't be that beneficial with the stock HU. I'm not an audiophile so it's not worth losing the integrated features of the stock HU to outweigh the sound improvement. One thing I learned from the other threads is that people are getting a significant improvement with just adding some 3.5" dash speakers and an even better improvement with 6x9" and 6.5" with the stock HU and without adding an amp. I've also read in many different posts that component speakers will almost always out perform coaxial speakers so I'm open to that. Since we love this new vehicle even more than our older Lexus RX, I'm ok with it not looking stock and am ok with adding speaker locations especially in the rear as I can't believe there aren't any for the 3rd row. However, I'm super busy and don't have time to experiment with different speakers, nor do I have the equipment to do sound tests to optimize the system so if I'm just opening a can of worms here, let me know and I'll just throw in Infinity Reference 3.5", 6x9" and 6.5" and be done with it since others have had good success with that and I don't want to reinvent the wheel. However, if some of the ideas I present will almost surely give me better results (using the Infinity Ref 3032cfx, 9632ix and 6532ex as a baseline) then I'm willing to take it up a notch. Also, if I do install everything myself, would a good stereo shop likely be willing to "tune" the system for a reasonable fee? The quotes I got for just swapping out speakers was crazy so I'd rather do as much of it as I can and then leave the tuning to the experts to pull it all together. Talking to Crutchfield they said that there isn't a lot of extra room and those Infinity speakers above barely fit where other "beefier" speakers won't so that's something I'm keeping in mind.
Using just the stock 6 speaker locations:
Option 1. Use the same Infinity speakers as above and add an amp to them.
Option 2. Use the same Infinity speakers above and not use an amp but add a powered 10" sub such as the Rockville RW10CA (seems to be the best rated) or other.
-Which of these two options would likely give better results because those Infinity Reference seem to be fairly efficient and do well with the stock HU without an amp. Or would an amp drive them or other speakers so much better that the 6x9s or 6.5"s would give enough bass that it would be comparable to an under-seat powered sub?
Adding speakers in addition to using the 6 stock locations:
Option 3. Go with a component 3 way system with a 6.5" or 6x9" in front door, 3.5" or 4" in dash and 1" tweeter in sail panel, A pillar or door (where would be the best location for this in a 2015 Highlander XLE?
-Focal Access 165 A3 (6.5", 4" and 1", 92 dB sensitivity) https://www.amazon.com/Focal-Access...r_1_2?ie=UTF8&qid=1527953990&sr=8-2&keywords=focal+3+way+component+speakers+6.5
-Infinity REF-9620cx (6x9", 1" and add a 3.5") or Kappas or Primus in a 6x9 or 6.5" component system
-Sony XS GS1631C (6.5", 3.5" and 1", 97 dB sensitivity) https://www.sonicelectronix.com/item_151807_Sony-XS-GS1631C.html
How much better does a 3-way component system sound vs 2-way component? I couldn't imagine only having a tweeter in the dash without a 3.5-4".
Option 4. Then I'm wondering what options I'd have in the rear so we'll call this option 4 even though I know there are lot's of options. I can't believe there aren't any speakers back by the 3rd row. What would be a good way of adding some back there and would I just tie them into the speakers in rear doors? I'm sure I'll have more questions once I get some comments but I'm trying to keep this as simple as possible. If there isn't going to be a huge improvment adding speakers to the 6 stock spots then I'll just use those locations and then add an amp or sub based upon what would give the best results.
Thanks for your help!
Using just the stock 6 speaker locations:
Option 1. Use the same Infinity speakers as above and add an amp to them.
Option 2. Use the same Infinity speakers above and not use an amp but add a powered 10" sub such as the Rockville RW10CA (seems to be the best rated) or other.
-Which of these two options would likely give better results because those Infinity Reference seem to be fairly efficient and do well with the stock HU without an amp. Or would an amp drive them or other speakers so much better that the 6x9s or 6.5"s would give enough bass that it would be comparable to an under-seat powered sub?
Adding speakers in addition to using the 6 stock locations:
Option 3. Go with a component 3 way system with a 6.5" or 6x9" in front door, 3.5" or 4" in dash and 1" tweeter in sail panel, A pillar or door (where would be the best location for this in a 2015 Highlander XLE?
-Focal Access 165 A3 (6.5", 4" and 1", 92 dB sensitivity) https://www.amazon.com/Focal-Access...r_1_2?ie=UTF8&qid=1527953990&sr=8-2&keywords=focal+3+way+component+speakers+6.5
-Infinity REF-9620cx (6x9", 1" and add a 3.5") or Kappas or Primus in a 6x9 or 6.5" component system
-Sony XS GS1631C (6.5", 3.5" and 1", 97 dB sensitivity) https://www.sonicelectronix.com/item_151807_Sony-XS-GS1631C.html
How much better does a 3-way component system sound vs 2-way component? I couldn't imagine only having a tweeter in the dash without a 3.5-4".
Option 4. Then I'm wondering what options I'd have in the rear so we'll call this option 4 even though I know there are lot's of options. I can't believe there aren't any speakers back by the 3rd row. What would be a good way of adding some back there and would I just tie them into the speakers in rear doors? I'm sure I'll have more questions once I get some comments but I'm trying to keep this as simple as possible. If there isn't going to be a huge improvment adding speakers to the 6 stock spots then I'll just use those locations and then add an amp or sub based upon what would give the best results.
Thanks for your help!