I built a pair of Transmission Line Array speakers from a design by Bill Fitzmaurice. Instead of using the recommended driver, I chose some budget speakers from Parts Express, since many sources online confirmed that many drivers are suitable for this particular design. Originally I thought of using these for Hauptwerk but ultimately I abandoned that idea. Line arrays are great for PA use, etc. but not for organs. It was still a fun build. I still have these if anyone is interested in taking them home.