Teufel Mynd open source / open hardware Bluetooth speaker
lu.teufelaudio.com
lu.teufelaudio.com
Nuts and bolts; - Users can replace batteries with just a few screws, and everything is modular. - Components like batteries, PCBs, drivers are from mainstream suppliers and easily replaceable to minimize waste. - Teufel has released full schematics, PCB layouts, firmware, and 3D-prints for the housing.
"We developed the drivers in-house, so the replacement parts for those are available only from Teufel. But if you instead use similar drivers, it is possible to build a whole MYND on your own using the data we published. You could produce the boards using our PCB diagrams, buy components from various retailers and assemble."
So, as we'd say in Germany: „Jein“. (Yesno) Looks like it uses off-the-shelf components except for the drivers.