Speaker engineering and design

Danny Ritchie from GR Research has been working with Ron Brenay (New Record Day) to create a weekly series of video podcasts discussing various aspects of speaker design. I think I saw these mentioned once before in another post, but I think these deserve a post of their own. 

Danny comes across as a very knowledgeable engineer who is passionate about great sound and helping others understand how to achieve it. I've really enjoyed watching these and thought there might be others interested as well. Here's a link to the playlist which I believe includes all the episodes. 

https://www.youtube.com/playlist?list=PLUFNGRKZZWXzCt2Syx4yjR4Oy7V-uiePB&fbclid=IwAR2kiw94DBcXbZ0gdwZMIw_YO90No4ZLZ31wAf_WCyW0eF6XxH_aP-U0vsk