How to Improve OE Sub Bass Quality and Eliminate Vibrations

[ColonelAdama]

If you are taking those panels off tighten the strut brace bolt, it is a T50 I believe. My passenger side causes the most annoying creaks. I have tightened it twice now but it always starts up again after some time.

Next step I am going to try is to remove the strut brace entirely and put some felt tape on it.

My strut brace creaked and annoyed the hell out of me for the first couple months of driving the car. It seems to have settled in and quieted down after 1500 miles. I only hear the creaks when the chassis is being flexed considerably.

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[BA9092]

I replaced the OEM trunk bar with the Cusco brace and also added Tesa felt tape to the bottom of the window (green area in photo) where the two interior trim pieces touch - it seems those pieces tap on the windows when the car flexes over bumps. My creaks and rattles are nearly all gone!

 

[LS-4pot]

^Very good idea!

 

[SCZ4]

I replaced the OEM trunk bar with the Cusco brace and also added Tesa felt tape to the bottom of the window (green area in photo) where the two interior trim pieces touch - it seems those pieces tap on the windows when the car flexes over bumps. My creaks and rattles are nearly all gone!

Wondering if that's where my squeak is coming from, although sounds further back.

Is that panel quite easy to remove? Did you use felt tape?

 

[BA9092]

Wondering if that's where my squeak is coming from, although sounds further back.

Is that panel quite easy to remove? Did you use felt tape?

Yes, I used the Tesa brand felt tape.

The trim pieces are two separate sections that are just held with clips and pop right out. The one further back comes out first, then the one under the b-pillar around the seatbelt.

There are videos of this if you search for either the harness trunk bar install or an audio/speaker replacement video.

 

[NINaudio]

Has anyone who's done this used acousta-stuf polyfill instead of the batting to fill that metal channel?

 

[Stvee]

I don't think mine is the bar itself. Holding on that or pushing it to either side doesn't make a difference. Whatever it is, it seems like it's behind one of the two panels removed here.

I might pop those off and see what I can find.

I pulled the panels off and still can't find whatever is buzzing. I guess it has to be under the subwoofer cover at this point. It's so annoying because the sound is pretty good otherwise.

 

[SCZ4]

After doing this I still have some sort of vibration right behind the seat I'm hunting down. I've already put foam in the one panel directly behind the seat back but there is something that's rattling about head level it sounds like. Any ideas what that could be?

Grab the strut bar next time you hear it. This was my issue despite being convinced it was further back in the car. As per advised here, removed it, filled with expanding foam and reattached. Not a single rattle in the car now

 

[Stvee]

Grab the strut bar next time you hear it. This was my issue despite being convinced it was further back in the car. As per advised here, removed it, filled with expanding foam and reattached. Not a single rattle in the car now

Unfortunately that didn't make any difference on mine.

 

[SCZ4]

Unfortunately that didn't make any difference on mine.

Ah, that's a shame. I also put some tape in the following location as it's a known issue.

This thread is worth a read - https://www.supramkv.com/threads/interior-rattles.18459/page-2#post-290218

 

[Stvee]

Ah, that's a shame. I also put some tape in the following location as it's a known issue.

This thread is worth a read - https://www.supramkv.com/threads/interior-rattles.18459/page-2#post-290218

Even with those two panels out I still have the rattle. It's only noticeable on certain frequencies like bass drum hits.

 

[Loco38SUP]

Has anyone who's done this used acousta-stuf polyfill instead of the batting to fill that metal channel?

Yes but sounded better without it so I removed all of it.

-RJM

 

[Sam B]

This is the only way to improve bass in the Supra. Big old real subs

 

[BMWAF]

This is the only way to improve bass in the Supra. Big old real subs

Not really.. that's overkill mate.

 

[BA9092]

This is the only way to improve bass in the Supra. Big old real subs

I would've loved this in my 20's, but I'm too old for that now.

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