If those aren't particle board, they costed a freakin fortune to make.
PB $8 a sheet
MDF $27 a sheet
Plywood $32 a sheet
Berch plywood $58 a sheet
(Not Enough Difference To Complain About)(try PB Before Booing it)
looks godley, get some memphis mclass subs and some carpet and you'll be the #1 most unique builder around.
the subs will be replaced with treo ss's soon. the boxes are mdf(which i got a lowes for $20 a sheet) and i don't have two full sheets in there(spent about $75 total to build them). i have about 15 hours total so far in the project. thanks for the comments..still haven't decided on finish yet.