I present the ultimate in DIY. Reused drivers from a Bose VCS-10 in MDF salvaged from a dresser found on the side of the road. Wired with leftovers from a ceiling fan
3 Bose 901 Series III IV V VI 4.5" 108515P Speaker Driver Parted From Series IV Tested | Reverb
DIY Replacement Hifi 35mm Speaker Unit Driver For Bose 700 Headphones 20ohm Repair Parts Noise Reduction Wool basin Membrane - AliExpress
Bose Speaker Driver for Bose Wave Music System II III IV | eBay
Bose D-11B Full range driver for 802/901 — Big "D" Broadcast Exchange