Geoff Martin has been blogging a long time, writing about general audio topics and the technology inside B&O products. The video released this week is fantastic.
“That resonant frequency - the frequency where the woofer wants to move back and forth - is going to be a problem if we don’t do something about it. So we know what that resonant frequency is when we build the speaker, and we counteract it with a filtering we apply beforehand. In other words… [zoom in on weight dangling from spring]”
His approachable style, visualizations, and well edited videos make it really easy to watch and learn. The subject matter is basic but he gets into details that often aren’t discussed in a way that makes the engineering digestible for laypeople. Highly recommended video series.