RIP Siegfried Linkwitz

[precaud]

If you've been at all involved in designing and making speaker systems in the last 3 decades, chances are very high that Siegfried had a significant influence on your design considerations and/or process in one way or another.

https://www.avhub.com.au/features/hi-fi/obituary-siegfried-linkwitz-193582112018-512500

And this was all done in his spare time, and given away, put in the public domain.. His real job was designing RF network and spectrum analyzers at Hewlett Packard. An exemplary engineer and human being.

[Tomorokoshi]

Here is the August, 1979 Hewlett Packard Journal that features some of his work.

http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1979-08.pdf