How to Improve OE Sub Bass Quality and Eliminate Vibrations

[Sam B]

This was the first attempt. Midbass on top of existing box and ported 10 in the rear

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[tadda]

Thank you Tadda for this wonderful thread. One week into my ownership and you basically fixed the worst thing about it

Your welcome....

It's been a year now since I moved on from the Supra but nice to hear that after over 3 years since I posted this thread it's still helpful / useful for some....

 

[FLtrackdays]

Your welcome....

It's been a year now since I moved on from the Supra but nice to hear that after over 3 years since I posted this thread it's still helpful / useful for some....

Man I hope you’re listening to the engine noise on the track as well. Beautiful Vette brotha!

 

[obito]

Your welcome....

It's been a year now since I moved on from the Supra but nice to hear that after over 3 years since I posted this thread it's still helpful / useful for some....

Just randomly looked at subs online, found this thread again because I’m getting more into audio quality and I can’t believe you don’t have a Supra anymore (and it’s been a whole year?). You were great with it. I don’t post here anymore but I’m just enjoying mine all the time. Good luck with your future genius tutorials

 

[Stvee]

Thank you!!

I was about to think the same... BTW mine is also a 2023 MT... not sure I saw anyone else in the thread with this issue other than us, so maybe that's something for the 23/MT.....

What's interesting though is that it wasn't that bad before I started the project, so I kinda feel there's something at the upper piece of the subwoofer box. I see you removed the side panels before, have you removed that top part as well?

I forgot to post on here but the dealer did end up replacing that speaker finally (probably) and if anything just made matters worse. At this point I'm thinking there is just something vibrating behind one of those panels so I'm probably just going to tear it apart and fix it myself. It's bad enough now that I can hopefully track it down more easily.

The reason I say they probably replaced it is because the receipt they gave me listed the part number for the passenger side but they say it was actually the driver side they replaced.

 

[roddrsw]

I forgot to post on here but the dealer did end up replacing that speaker finally (probably) and if anything just made matters worse. At this point I'm thinking there is just something vibrating behind one of those panels so I'm probably just going to tear it apart and fix it myself. It's bad enough now that I can hopefully track it down more easily.

The reason I say they probably replaced it is because the receipt they gave me listed the part number for the passenger side but they say it was actually the driver side they replaced.

Dealers doing their great support as always...

Thanks for the update though! I haven't fixed mine yet but somewhat the noise is lower...

I tried just removing the top subwoofer case to try to see something but it didn't helped mine on anything (at least on mine). It's worth trying to see if you can find something before tear it down. There's just a couple clips around that you need to gently pull each one up. Easy to remove and reinstall.

I also found this topic where they just slid the baffle high enough to access the subs so no need to remove the entire thing, I will try to do that any day. That would definitely help on finding the damn noise.

 

[PikkaGTR]

The stock rear vanity bar rattles alot
Also stuffing the inside of the subwoofer e closer with speaker wadding helped out tremendously
I ended up using the Integral Audio subs for F series BMW and did the Cusco harness bar plus speaker wadding mod and all of my rattles are now gone

 

[Stvee]

Dealers doing their great support as always...

Thanks for the update though! I haven't fixed mine yet but somewhat the noise is lower...

I tried just removing the top subwoofer case to try to see something but it didn't helped mine on anything (at least on mine). It's worth trying to see if you can find something before tear it down. There's just a couple clips around that you need to gently pull each one up. Easy to remove and reinstall.

I also found this topic where they just slid the baffle high enough to access the subs so no need to remove the entire thing, I will try to do that any day. That would definitely help on finding the damn noise.

It's definitely NOT the small set of speakers behind my head. I have that taken out now and the sound is coming from the subwoofer area. I'm leaning toward the driver side subwoofer itself having a blown voice coil.

The stock rear vanity bar rattles alot
Also stuffing the inside of the subwoofer e closer with speaker wadding helped out tremendously
I ended up using the Integral Audio subs for F series BMW and did the Cusco harness bar plus speaker wadding mod and all of my rattles are now gone

Are you saying integral audio makes a replacement speaker that will fit in the stock subwoofer box? If so can you link exactly what you bought?

 

[roddrsw]

It's definitely NOT the small set of speakers behind my head. I have that taken out now and the sound is coming from the subwoofer area. I'm leaning toward the driver side subwoofer itself having a blown voice coil.




Are you saying integral audio makes a replacement speaker that will fit in the stock subwoofer box? If so can you link exactly what you bought?

Yeah that's about the exact same for me. That's what I mentioned, to remove the top subwoofer "mesh case". My case is also only on the driver side subwoofer

 

[Stvee]

Yeah that's about the exact same for me. That's what I mentioned, to remove the top subwoofer "mesh case". My case is also only on the driver side subwoofer

Welp I just bought a used replacement from ebay for $80 so we'll see how it goes. I'll update you once I have that installed hopefully next week.

 

[PikkaGTR]

It's definitely NOT the small set of speakers behind my head. I have that taken out now and the sound is coming from the subwoofer area. I'm leaning toward the driver side subwoofer itself having a blown voice coil.




Are you saying integral audio makes a replacement speaker that will fit in the stock subwoofer box? If so can you link exactly what you bought?

https://integralaudio.com/underseat-woofer-for-bmw-3-series-f30-e90.html

You'll need to purchase and adaptor harness for $12 ebay#
312289590391

And do a bit of wiring , but retains the ability to revert back to stock
I spent $320 with tax and shipping on these and they sound better than the Bavsounds for $600 I had in the F80

 

[Stvee]

https://integralaudio.com/underseat-woofer-for-bmw-3-series-f30-e90.html

You'll need to purchase and adaptor harness for $12 ebay#
312289590391

And do a bit of wiring , but retains the ability to revert back to stock
I spent $320 with tax and shipping on these and they sound better than the Bavsounds for $600 I had in the F80

I ordered a replacement stock one for now since my passenger side sub is fine. If that doesn't work I'll probably go this route. Thanks for the info.

 

[ShakaDaKine]

I forgot to post on here but the dealer did end up replacing that speaker finally (probably) and if anything just made matters worse. At this point I'm thinking there is just something vibrating behind one of those panels so I'm probably just going to tear it apart and fix it myself. It's bad enough now that I can hopefully track it down more easily.

The reason I say they probably replaced it is because the receipt they gave me listed the part number for the passenger side but they say it was actually the driver side they replaced.

Interesting, for I've been trying to get Toyota to do a proper diagnosis of my driver side subwoofer distortion, since I purchased the car. The first dealer replaced the speaker, but that didn't fix the issue...the problem is with the Amp or wiring. The subwoofer bounces up and down, like it's clipping. The second and third dealerships compared the sound with another Supra and are stating it sounds 'normal'...bunch of malarkey! The first dealer showed me the speaker, while it was playing, so I know there's definitely something wrong. I liken the experience to that of an Amp with the gain control turned up too high on that channel, but these amps don't have that adjustment capability. Toyota just keeps giving me the runaround...currently have the speaker disconnected, so I can listen to music buzz-free.

 

[Stvee]

Interesting, for I've been trying to get Toyota to do a proper diagnosis of my driver side subwoofer distortion, since I purchased the car. The first dealer replaced the speaker, but that didn't fix the issue...the problem is with the Amp or wiring. The subwoofer bounces up and down, like it's clipping. The second and third dealerships compared the sound with another Supra and are stating it sounds 'normal'...bunch of malarkey! The first dealer showed me the speaker, while it was playing, so I know there's definitely something wrong. I liken the experience to that of an Amp with the gain control turned up too high on that channel, but these amps don't have that adjustment capability. Toyota just keeps giving me the runaround...currently have the speaker disconnected, so I can listen to music buzz-free.

Yeah that's why I'm not even bothering taking it back to the dealer this time. I'd rather roll the dice on a used ebay subwoofer than mess with the dealer.

They gave it back to me sounding like shit last time so no reason to think they would do any better the second time.

 

[tadda]

For those of you having issues with the drivers side subwoofer distorting....Do you have ASD (Active Sound Design) disabled? And if so how (physically unplugged ASD module or shut off using Bimmercode)...IIRC, the over-riding synthesized signal from the ASD module is only fed to the driver's side subwoofer...

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