vinyl record stretched into speakers

https://www.youtube.com/watch?v=cB6h2GZJmlg
Die Vinyl Schüssel

https://www.youtube.com/watch?v=e3e32fHZ-LM
passive amplifier manufacturing







https://www.youtube.com/watch?v=leckCWLYP7M

Change the Record by Paul Cocksedge




http://www.jambledandt.com/product-design.html