The wood I used was a MDF fibreboard, 30 mm. thick, a great width which gives a
very good resistence to vibration and gives a very sturdy heavy frame to the
membranes (together with the perforated metal plate), helping considerably to make the bass frequencies all the more
attractive, something that can be considered the soft point of the project.Having such a thick piece of wood, makes the cutting a real adventure, MDF boards create an incredible amount of wood dust, so beware!
It also creates a problem not considered in the original project, how do you get the magnets close enough to the membrane?
It is much heavier than the original project frame, the loudspeaker foot has to be much stronger than usual, obvious....!.
I recommend having the wood cut by an expert, here in Chile that is very inexpensive, maybe not so in your country.
If you plan to paint your loudspeakers do it after it's been cut and before you start doing anything else.
Here are the original danish project dimensions:
a=30 cm
b=22 cm
c=95 cm
d=4,5 cm
e=95 cm
f=14,5 cm
g=11,5 cm
h=75 cm
i=130 cm
If you want a bigger loudspeaker, use the following dimension relationship:
4:3:13
This also changes other dimensions, be careful and check everything out
before doing anything irreversable.