I've noticed on my last few box builds that if i use a double MDF face (double 3/4"), it ends up sounding different than single face. Am I hallucinating or does the thickness of the MDf actually change the sound? Anyone with experience please chime in.

 

It may due to being a denser material. MDF typically has a density of 600-800 kg/m³. I haven't seen double MDF, but have seen HDF (high density) which is 600-1450 kg/m³. Is the double sided a sandwiched laminate? If so, the different densities and epoxy will effect sound, vibration and strength.

 

Double thickness is just two pieces of 3/4" glued together...

 

anyone?

 

the box is more sturdy and doesnt flex as much so it helps

 

Usually 1" or doubled up 3/4" MDF is used on enclosures that house very powerful subwoofers that have the ability to flex the wood which can in turn create negative pressure resulting in loss of sound...Insternal bracing is something that is also used to aid in the correction of this problem. Like 'If6was9' said, density and bonding materials can also effect the sound....Unless you are very experienced and have a very tuned ear for bass this is not really noticable...

 

the denser the baffle is, the better it will sound. simple as that. Think of it as mounting a piece of paper vs. mounting the same speaker to a piece of thick cardboard. One is obviously easier to bend.

 

I am going to put the same sub in a single baffle enclosure of the same ft^3 just as a test. I will let you all know.

 

Try 1/2" stainless steel

 

hehe