I was looking around for a project and decided to replace my 20 year old Sony satellite HT speakers, starting with the front 4 channels and the sub. I purchased DIY Sound Group's Fusion-6 MT and MTM speaker flatpacks as well as a Dayton Audio 10" Reference Series HO Subwoofer and Cabinet Bundle from Parts Express. (I think those are made by erich as well. I replaced the flat (non-CNC) visible bits of the flatpacks with bamboo plywood of the appropriate thickness and added a little joinery and dowel pins. Someday soon, I plan to paint the MDF gloss black and simply oil the bamboo. Sounds great and I think it turned out pretty well.