DIYMobileAudio.com Car Stereo Forum banner

Trunk Baffle Materials?

2.8K views 9 replies 5 participants last post by  Randy G  
#1 ·
Getting ready to do my first Infinite/Trunk Baffle install, and I got to pondering on different baffle materials. Since this will be a wide, flat piece, it stands to reason that I'd want something denser/more resistant to resonating.

Now, I could just do multiple layers of MDF or birch ply. This is probably the easiest way to go about it. But I'm wondering if anyone here has used different materials for IB baffles or just enclosures in general.

For example, a 1 inch slab of concrete that is the right size to cover the inside trunk opening would weigh about 75 pounds based on my calculations. A triple-baffle with 3/4 inch birch would weigh in the neighborhood of 45 pounds or so.

Obviously, making a concrete baffle isn't that hard. Just make a mold and pour. But securing/sealing it to the car and mounting the subwoofer would be another matter entirely. I still think it could be done with proper tools and planning, but it's going to take a lot of thought.

I also thought if steel or aluminum. Still seems way too heavy, and aluminum seems super pricey. Anybody have any other suggestions, or am I just way overthinking this? I have access to a huge CNC router, so I could knock out a 3-layer birch baffle rather quickly. I could probably use the router for metal, too, but I'd need the right bits.
 
#5 ·
Figured as much. But I can't help myself from trying to come up with a new way to approach things. Every once in a while, I come up with something gold, but most of the time it's just dumb 🤣
 
  • Like
Reactions: Freakquency
#3 ·
I will add....i thought that if i had the money an acrylic baffle would be nasty with a pretty set of woofers. (like the Audio Development MM12s)
 
owns 2019 Toyota Avalon Limited
#4 ·
From what I understand, though, acrylic isn't really any better than a good mdf/ply. And a 4x8 sheet of 3/4" acrylic is PRICEY these days.
 
#8 ·
The concrete idea would be interesting, but honestly, I would just go to a countertop shop and get a piece of granite cut to size, the hole cut and polished, drilled, etc. it would probably be more stable than poured concrete as well. being a smaller than countertop size they may have some cut-off pieces you can get a deal on.

I have some connections in the industry, I might look into that when I get bored and redo my build. :unsure: