How to Improve OE Sub Bass Quality and Eliminate Vibrations

[BMWAF]

Still under warranty. 3k miles and only 6 months old. I just hate taking my cars to shops. Never trust them to treat the car like how I treat my cars. Thanks for the advice ?

Agreed. Toyota dealers are indeed the single biggest issue with the Supra. And you're welcome. Hope you get it all sorted.

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[swrdply400mrelay]

Do not overpack the bass cavity with wading...You'll destroy lower bass response..

As described in my writeup only the inner walls of the cavity should be covered...I know some people have had problems in the past placing the thin sheet wadding against the walls...And although less than ideal, you can also pull the wadding sheets apart to fluff them up and very loosely fill the cavity...Just do not compress the wadding or you'll greatly reduce low end bass response...

Good to know, I packed my with wadding, I'll take some out this weekend and see how it sounds.

 

[Katsuragi]

Just got a MY25 and would like to do this mod. It looks like the Noico lining is no longer available. Can anyone point me to another option?

 

[Sam B]

Resonix

 

[Turbro]

It would easily add 3~4x the time and effort...Not sure why everyone is struggling with the wadding...It was fairly straight forward for me....

Also if you don't want to take the time to do the "fold / insert / unfold" technique through one of the 3 elongated front port holes you can always tear the wadding into small pieces and "loosely" stuff the cavity....do not overstuff the cavity as this will reduce bass response...

Here is a pic with woofer removed to give you an idea as to what it would still take in install wadding from the top (under the woofer)

TBH this should be in the main post. I think it would clear up everyones questions about the wadding insertion without removing the enclosure box. Took me 26 pages of reading to figure out how NOT to remove the sub enclosure and do the wadding. Cheers!

Edit: I ended up taking the side panels out and lifting the enclosure to remove the subs. PITA and broke a few tabs in the process. Probably not worth doing but I did get the wadding in the holes as cut out and shoved in

 

[steelpearl]

Anyone hesitant to cut holes in your panel should try just doing the 2” high density foam between the outer plastic panel and metal enclosure. I did this today with no other steps and am pleased with the difference it made.

A tip for installing the middle foam section is to cut it in half between the slits and put each side into the center bracket separately.

 

[MK5_Ger]

My Supra has some rattles from the subwoofers with low bass.
They already got replaced under warranty. This improved it a lot but the issue isn't gone. Sounds like a rattle caused by the trim but it's coming from the speaker itself at low frequencies.

Would the vents improve this?
Does anyone have the OEM part number of the trim piece that needs the 2 holes put in?

 

[Pizza]

My Supra has some rattles from the subwoofers with low bass.
They already got replaced under warranty. This improved it a lot but the issue isn't gone. Sounds like a rattle caused by the trim but it's coming from the speaker itself at low frequencies.

Would the vents improve this?
Does anyone have the OEM part number of the trim piece that needs the 2 holes put in?

Try removing the trim and then playing music. The vents will effectively be the same as with the trim fully removed

 

[yo dude]

Just completed the Tadda Port Mod. I got everything from Amazon in one delivery, and wanted to share reference links to help anyone in the USA thinking about doing this.

Some links are redundant with the first post, but listing everything for completeness.

• ABS Speaker Port Tube 2" Diameter, 1" Length (qty 2)
• Two Piece 2" Speaker Grill Cover Mesh
• Foam Cushion 2"x22"x20"
• Speaker Cotton
• Dynamat

These Grill Cover Mesh come disassembled and fit perfectly with the back of the Speaker Port Tube.

The grill's outer liner and screws are NOT used. Just keep the mesh.

These literally just pop on the back perfectly.

Apply a very thin layer of Hot Glue or Super Glue around the mesh's outer lip, then press the mesh down on to the back of the ABS Speaker Port.

I used a Hot Glue gun.

Flush fit.

Pop them in, glue, and you're done.

 

[Stvee]

My Supra has some rattles from the subwoofers with low bass.
They already got replaced under warranty. This improved it a lot but the issue isn't gone. Sounds like a rattle caused by the trim but it's coming from the speaker itself at low frequencies.

Would the vents improve this?
Does anyone have the OEM part number of the trim piece that needs the 2 holes put in?

No it wont help. I went through this with the dealer on my car as well. We tried replacing the speaker and amp and neither made a difference. According to them they all do it.

If yours is like mine, the drivers side subwoofer is way worse. I just ended up unplugging that one. You lose a small amount of bass but the sound system is at least tolerable at that point.

Of the 13 cars I've had so far, these have probably the worst sound system.

 

[MK5_Ger]

No it wont help. I went through this with the dealer on my car as well. We tried replacing the speaker and amp and neither made a difference. According to them they all do it.

If yours is like mine, the drivers side subwoofer is way worse. I just ended up unplugging that one. You lose a small amount of bass but the sound system is at least tolerable at that point.

Of the 13 cars I've had so far, these have probably the worst sound system.

This doesn't sound very promising.
But thanks for sharing it. Means this isn't a one of case.
Maybe if I can get my hands on some cheap BMW Harman Kardon subs I try to change them and see if it helps...

And yes, it's one of the worst "premium" sound systems I have ever heard. It's even worse than the already bad Harman Kardon system in F Series cars.

 

[mittenstheg]

No it wont help. I went through this with the dealer on my car as well. We tried replacing the speaker and amp and neither made a difference. According to them they all do it.

If yours is like mine, the drivers side subwoofer is way worse. I just ended up unplugging that one. You lose a small amount of bass but the sound system is at least tolerable at that point.

Of the 13 cars I've had so far, these have probably the worst sound system.

Brother. This has me so depressed. I spent $200 just to remove the OE sub. I wanted to swap it. But everyone is telling me this fixes nothing. I guess I’ll buy a downfiring sub and call it a day.

 

[maniac]

Do you need to remove the subwoofer to get roll in the wadding for the enclosure?

I am not sure if you mean the ports you see when you remove the back panel or the ones you only see when ( it looks like) you remove subs??!

For those that are going to do this project here is another Pro-Tip:

You do not need to remove the Subwoofer Cover (#11) shown below:

You just need to remove the narrow rear cover (#16) shown below:

I was actually able to roll up the speaker batting cut from a template (shown below) and slip it through one of the elongated exhaust ports and then use a long screw driver to manipulate the cut batting to line the walls of the metal enclosure shown below:

 

[tadda]

Do you need to remove the subwoofer to get roll in the wadding for the enclosure?

I am not sure if you mean the ports you see when you remove the back panel or the ones you only see when ( it looks like) you remove subs??!

I rolled up the wadding and inserted in through the side ports....

 

[BMWAF]

Do you need to remove the subwoofer to get roll in the wadding for the enclosure?

I am not sure if you mean the ports you see when you remove the back panel or the ones you only see when ( it looks like) you remove subs??!

No. You can stuff it into the holes in the back panel.. but it is a bit of a pain in the ass to get done. ?

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