Why not just cut the side panels back enough to just clear the speaker cones
in the area of the speakers and complete the lining that way. The MDF is
used in this manner to increase the mass of the surfaces of the speaker
boxes; so, as long as it is mostly there it should do the job nicely - 1/8"
thickness will not do an effective job of increasing the mass of the box
side panels. BTW, to do this job effectively, the MDF liner should be
surface glued to the sides of the box.
Jim Seelye

"JGS" wrote in message
...
We are building an entertainment unit for a client. He designed it himself
and did a nice job. He wanted the boxes that hold the speakers to be lined
with MDF.
Now that we have built the unit we have found that here is room at the
top, bottom and back of boxes (cabinets) for 3/4" MDF but because of the
size of the speakers there is only room for 1/8" (if it's even available)
for the sides.
Is 1/8" MDF going to make a difference? Is there another material to use?
Or the broader question, is MDF required / desirable at all.
Thanks, JG