This is an excellent video of how MBL makes their speakers at the factory. There are two parts to the video, first showing tweeter and midrange construction the second the bass driver. Two things that struck me about the video are, first that they use what appears to be traditional fiberglass insulation to dampen the inside of their bass drivers, tried and true, best damping material? Second that it looks like they use a cheap consumer counter top convection oven to cure the glue in their midrange drivers? I would think that would have some hi tech lab oven, it was just funny to see in the video I actually paused it confused as it seemed out of place. Any way here you go: part one https://www.youtube.com/watch?v=RrNOq41LGjs part two https://www.youtube.com/watch?v=G5EMrFsT7V4