4" front speaker mod (with pics)

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  1. #1
    Member cagedbear's Avatar
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    4" front speaker mod (with pics)

    So I've had blown oem speakers in the front for forever and finally broke down to diy a permanent solution together. I'll update this with pics tonight or tomorrow and give a step by step
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    Last edited by cagedbear; 08-22-2019 at 12:55 PM.
    1983 Black P-Type (sold and quickly wrecked)
    1984 Maroon P-Type (The Flying Turd)

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  3. #2
    CelicaSupra.com Member AJ's Avatar
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    Nice work!! Looking forward to the update!!
    Regards,
    Arch
    '86 Supra MA67
    Brullen 2.5" Exhaust, HKS Fly w/7MGE clutch,ST Springs, RC Intake & TB, 2.8GT & XX emblems, Factory Add on Rear Shoulder belts, Pioneer DEH-P2000 AM/FM/CD w/CDS-P5000 CD Player, Compomotive CXNs 8x16

  4. #3
    CelicaSupra.com Member wagzilla's Avatar
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    nice job, I have some old speaker I want to install soon. Did you make the bracket?
    if you have a bitch, have a fix, or don't bitch?

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  6. #4
    Member cagedbear's Avatar
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    Alright, sorry about the huge wait. sometimes life happens....

    So when mocking up the speakers I'm sure most of you know that these plastic bezels suck.




    What I used.

    I had some aluminum trim from a shed I built last year at the farm. This material is sturdy but bends and conforms easily for application



    Cutting a flat peice of aluminum I mocked up my mounts. There was a ton of trim work and measuring to get them right.








    Then I mocked up the lower mount while using the oem mount location.








    I used a bead of silicone to seal the mounts and eliminate vibration.





    I then fit the speaker and mounted. After mounting I covered the edges with a bead of silicone as well. Pretty much the same method used on the other side.






    Here's how they look finished and in place. Best part is you dont have to drill into your dash for this mod to work.




  7. #5
    CelicaSupra.com Member SupraFiend's Avatar
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    Yeah I did something similar with fiberglass back in the 2000s, I'm still rocking them and they sound pretty good. I also cut out the steel in the outer dash panel to reduce the blockage of the sound waves a bit more. Good job, I highly recommend people do something along these lines vs butchering door panels or such. I've actually found the sound quality of 4 inch speakers in the stock location to be better then most door speaker setups anyways. If you stick a big speaker down by your feet, you can't hear it at all. My 04 Tacoma has them there and I can't hear the drivers side speaker at all, same in the wife's corolla.
    Black 86 mk2 Project Car
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  8. #6
    CelicaSupra.com Member
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    Yes, 4" speakers are much better than virtually any 3 1/2" speaker, no matter how much they cost. And I agree with Seamus, I did a similar mod decades ago and cut out most of the metal behind the grills. But the OEM plastic mounts performed a crucial function that you didn't duplicate when mounting the 4's. You must isolate the front of the speaker from the back or the bass will virtually cancel out. So seal all the way around the speakers so there's no air leakage around the edges. Otherwise, the 4's will put out less apparent bass than even the POS 3 1/2's did.
    I used component speakers in front and the sound is spectacular. 4's in the dash, 1" tweeters mounted on the mirror trim panels on the top front of each door and the crossovers stuffed under the dash wherever they'd fit. Getting the tweeter wiring into each door through the flexible boot was a bit of a chore though. The front speaker amp is stuffed under the passenger seat.
    The OEM rears were 5x7 Toyota footballs as they were called. I tried a few different ones and they all sounded universally awful. I made adapter plates that bolt to the factory mounts for 5 1/4's and only used the mid bass from component speakers without the crossovers or tweeters. It really sounds better without having tweeters in the back than it did with them. They definitely add rear fill and provide a bit of surround effect. But it sounds like the band is on the hood instead of in the car which is how it should be
    I made a sub box that fits tight up against the seat backs that's carpeted to match the OEM interior. Even with the hatch open, only somebody that really knows these cars would notice the box wasn't an original part of the car. It has 4x6 1/2" very high quality subs mounted facing downward in individual compartments. The box has 6 approximately 1 1/4" legs to space it up off the floor. The sub amp and rear speaker amp are mounted on the front side of the box and if you knew to look down through the small gap between the seat backs and the cargo cover, you might see them. This is all connected with quick disconnects for easy removal if necessary. But that sucker weighs about 90 pounds and removing it is easier with a helper. At one time I did have similar but slightly deeper box that held 2x10's that also sounded terrific. But the few extra inches of space it took up made the remaining space hard to fit groceries, etc into.
    I designed, built and installed all of this stuff not long after buying the car new. Other than finally updating to a modern head unit a few years ago, it's all worked perfectly since '85.
    And yes, besides enjoying the music, I equally like the music from under the hood.

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