I didn't bother sealing mine, but I have mine stuffed with ResoNix Fibermat.

 

Thanks, yeah that sounds like a good approach. If most of the back wave is being absorbed, I’m sure sealing them off isn’t necessary.

 

Hello everyone! Hoping to get some feedback from people that have been through the custom pillar building process. I just finished my first set of pillars. They’re not perfect and I would’ve done a few things differently, but it’s my first time doing fiberglass work so I’m happy with them. The inside edge of the pillar nearest the door is sealed up with rubber gasket, but the other side of the pillar just loosely sits against the windshield glass. Do people usually seal this edge up somehow to block backwave? I’m planning on putting some Ccf behind the speakers, but not sure if I’m overthinking it by considering sealing up that pillar edge.

thank you!

No advice regarding sealing but they look great and really work with the interior.

 

Thanks! Yeah I was shooting for something that blended with the interior well. Definitely a big improvement over the valicar pods I was running before.

 

What car is this? Looks nice n clean n factory!

 

2019 Audi S5, and thanks!

 

You can apply a strip of self adhesive foam along the edge next to windshield......add some absorbing materials behind the pillar

 

I got a 10db gain below 300hz doing this compared to just bare pillars.

 

If you completely seal them off you'll likely get a very peaky response in the lower midrange around 300ish . Like if you were to cup your hands and talk into them.

As long as u arent getting a lot of destructive interference where front and back wave are meeting, it's not that big of a deal...plus that's primarily only going to affect bass response.
At the frequency range the pillars are playing that's less of a concern bc you aren't trying to reproduce bass.

But as other said, if it's a concern, get some self adhesive weather stripping and put around edges of pillar before bolting back in.
Adding any sort of material to slightly absorb back wave will help but do not overfill it or you're back to same issue w midrange not having room to breathe.
Dense materials like black hole stuff/blue jeans fill can quickly take up space and choke off a midrange

 

If you completely seal them off you'll likely get a very leaky response in the lower midrange around 300ish . Like if you were to cup your hands and talk into them.

As long as u arent getting a lot of destructive interference where front and back wave are meeting, it's not that big of a deal...plus that's primarily only going to affect bass response.
At the frequency range the pillars are playing that's less of a concern bc you aren't trying to reproduce bass.

But as other said, if it's a concern, get some self adhesive weather stripping and put around edges of pillar before bolting back in.
Adding any sort of material to slightly absorb back wave will help but do not overfill it or you're back to same issue w midrange not having room to breathe.
Dense materials like black hole stuff/blue jeans fill can quickly take up space and choke off a midrange

Thanks! Yeah, preliminary RTA didn’t look problematic but also wasn’t looking at phase at all and I don’t know well enough that my resolution was fine enough to measure possible cancellations. Leaning towards not fully sealing them off for the reasons you mentioned, and just adding absorptive materials.

 

standard practice

 

Hello everyone! Hoping to get some feedback from people that have been through the custom pillar building process. I just finished my first set of pillars. They’re not perfect and I would’ve done a few things differently, but it’s my first time doing fiberglass work so I’m happy with them. The inside edge of the pillar nearest the door is sealed up with rubber gasket, but the other side of the pillar just loosely sits against the windshield glass. Do people usually seal this edge up somehow to block backwave? I’m planning on putting some Ccf behind the speakers, but not sure if I’m overthinking it by considering sealing up that pillar edge.

thank you! View attachment 426354







Any update? Do you need help writing your assignments or essays? You can trust CanadianWritings Canadian Writings: Best Essay Writing Service of Canada - 20% OFF for their writing services. I am recommending them because they are so good with their work. When I first used their services, I was a little scared. Are they good or not, or am I waiting for my money? but when they sent me the final project, I liked their work. thank you.

Any update?

 

@LBaudio picture above inspired me so I took them off, deadened the full inner surface and lined with SecondSkin 1/8” CCF. They don’t seem to be getting choked off at all at the lower frequencies, and seem to respond better. I did originally use body filler/fiber glass resin milkshake to strengthen them but wasn’t enough to dampen vibrations. They might not have been resonating, but i could tell the speaker was exercising the pillar. This definitely did the trick and now backwave leakage isn’t a concern.

 

little things make a huge difference