How to Improve OE Sub Bass Quality and Eliminate Vibrations

[Gothy666]

Moving cloth to exhaust ports would produce same results...Optimally, you really don't want to cover those ports with anything...I added the mesh for appearance only... I doubt any debris from the cargo area would get into the cavity...

Here are other options I also considered (replacing the 2" ports) which would secure to the narrow rear panel....

2" square grill cover

2" round grill cover

Has anyone tried using these speaker grills? Seems like it kills two birds with one stone; it allows air to escape, but prevents anything from getting into the holes.

Sponsored

 

[Rocksandblues]

i just left that whole bottom trim piece off when i went to drill port holes. It does sound better.

 

[tadda]

Has anyone tried using these speaker grills? Seems like it kills two birds with one stone; it allows air to escape, but prevents anything from getting into the holes.

I recall somewhere within this lengthy thread someone used these...

 

[Ceabax]

I just picked up my Supra the other day, and I had heard that some rattles were normal for this car with the factory stereo. But mine seems particularly bad, can anyone confirm this is normal, or does it seem like there's something wrong with my system...

 

[TYMBOM]

I just picked up my Supra the other day, and I had heard that some rattles were normal for this car with the factory stereo. But mine seems particularly bad, can anyone confirm this is normal, or does it seem like there's something wrong with my system...

It’s normal. I ripped it all out and replaced everything.

 

[digicidal]

That actually doesn't sound that bad (but could be captured poorly and much worse in person). I'd check to make sure that the hatch cover is firmly clicked in place but it mostly sounds like the vibrations through the sides and bar which are pretty difficult to damp.

Did you do all the tadda modifications from this thread already? There are a ton of places that can benefit from some felt, silicone sealant, foam, etc. - but it's really a game of whack-a-mole trying to get them all sorted out.

I've spent many hours working on that pursuit... to decent but not complete success.

 

[Ceabax]

I haven't done any of the modifications yet, I've only had my car a few days. I was first trying to determine if what I'm hearing is normal for this car, or if I was experiencing something worse.

It's pretty bad, the music isn't even that loud. Definitely going to go through the suggested mods, I can't have my system sounding like that. Gotta admit, I'm a little bummed a car this expensive has such a glaring issue.

 

[digicidal]

I haven't done any of the modifications yet, I've only had my car a few days. I was first trying to determine if what I'm hearing is normal for this car, or if I was experiencing something worse.

It's pretty bad, the music isn't even that loud. Definitely going to go through the suggested mods, I can't have my system sounding like that. Gotta admit, I'm a little bummed a car this expensive has such a glaring issue.

Yep... that's how I was at first as well. Luckily it drives well enough to make me forgive the audio quality and build quality (or lack thereof). I came from a Lexus RC-F with the Mark Levinson system - and while that car had no rattles, much nicer interior, much better audio, etc. - there has not been one minute of actual driving that caused me to regret my choice.

 

[zrk]

I haven't done any of the modifications yet, I've only had my car a few days. I was first trying to determine if what I'm hearing is normal for this car, or if I was experiencing something worse.

It's pretty bad, the music isn't even that loud. Definitely going to go through the suggested mods, I can't have my system sounding like that. Gotta admit, I'm a little bummed a car this expensive has such a glaring issue.

I can't tell anything from the videos other than the EQ being real off. Are you complaining about rattles, or are you complaining about the sound system? It's a little confusing from your post.

 

[Ceabax]

I can't tell anything from the videos other than the EQ being real off. Are you complaining about rattles, or are you complaining about the sound system? It's a little confusing from your post.

Ah sorry I thought it was clear from the video, it's the rattle that's my biggest concern.

 

[Gothy666]

So I'm finally doing this modification this Saturday along with the Dynamat. I have ZERO confidence regarding getting the acoustic poly-fill sheets to lay flat and proper. I calculated the square inches (166 sq in.) of the cut sheet diagram and cut the equivalent of cubes that I plan to stuff in the chambers. Do we think this will work?

 

[luv2xlr8]

So I'm finally doing this modification this Saturday along with the Dynamat. I have ZERO confidence regarding getting the acoustic poly-fill sheets to lay flat and proper. I calculated the square inches (166 sq in.) of the cut sheet diagram and cut the equivalent of cubes that I plan to stuff in the chambers. Do we think this will work?

Worked for me. I did the same, rough estimate of area and stuffed them in there. Just don't overfill it and you'll be fine.

 

[tadda]

So I'm finally doing this modification this Saturday along with the Dynamat. I have ZERO confidence regarding getting the acoustic poly-fill sheets to lay flat and proper. I calculated the square inches (166 sq in.) of the cut sheet diagram and cut the equivalent of cubes that I plan to stuff in the chambers. Do we think this will work?

Do not stuff or fill up the chambers! Stuffing the chamber will drastically diminish bass response and increase rattle....Your better off doing nothing than stuffing them!

Conversely, padding the sidewalls with thin polyfill sheet is done to eliminate any destructive side wall acoustic reflections which "effectively" increases the volume and in turn improve overall bass response....

 

[Gothy666]

Do not stuff or fill up the chambers! Stuffing the chamber will drastically diminish bass response and increase rattle....Your better off doing nothing than stuffing them!

Conversely, padding the sidewalls with thin polyfill sheet is done to eliminate any destructive side wall acoustic reflections which "effectively" increases the volume and in turn improve overall bass response....

I don't plan to fill to capacity. Far, far from it. But doesn't poly-fill work by simply making vibrations travel slower and thus tricking the woofer into thinking it's in a larger enclosure? Would it work if I just added SOME of the matting in the chambers?

 

[tadda]

I don't plan to fill to capacity. Far, far from it. But doesn't poly-fill work by simply making vibrations travel slower and thus tricking the woofer into thinking it's in a larger enclosure? Would it work if I just added SOME of the matting in the chambers?

In the application I outlined, and as I mentioned earlier, lining the walls is used to reduce destructive wave reflections and woofer dampening effects...

You seem intent on wanting to loosely fill the enclosure, so do it, and see if this works better for you...I will caution you though, that loose fill will have a tendency to move around during deep bass play and may actually create exposed voids within the enclosure and / or may cause the material to plug up the narrow elongated exhaust port holes...During deep bass just place your hand over the exhaust holes and you'll feel how much pressure is released though those holes!

Sponsored