Three-dimensional sound https://youtu.be/yp15_iiIK5U?t=14s
Auction https://www.liveauctioneers.com/item/24672499_1927-francisco-simplicio-presentation-classical
“Introduction to Stradivarius” by Peter Sheppard Skaerved http://www.rdiaz.org/rdmagazine52-29jun14.html#magazinerec1

1) Simplicio 1929 triple sound port guitars https://youtu.be/DbnKEwyAWrI?t=14s

2) Francisco Simplicio, his original ideas and their role in avant-garde flamenco guitars
https://youtu.be/cUk4aXFyih8?t=14s

3) Simplicio male/female guitars vs Barbero´s
Doble boca vs Triple boca flamenco sound
https://youtu.be/6adcHhY_KGA?t=14s

4) "Golpe" and percussive nuances on Simplicio 1929 triple sound port vs double sp
https://youtu.be/ZpqdKU_nn2k?t=14s

5) Sound portal(s) THE matchless feature
https://youtu.be/rjG1rH9d2iA?t=14s

6) New Simplicio 1929 negra zero fret
https://youtu.be/gmpEzJHrVK4?t=14s

7) Simplicio shingle-wood top negra 1929
https://youtu.be/1i77pC_QrbQ?t=14s

8) Affordable Simplicio 1932 new flamenco model
https://youtu.be/Qw4BehK6Vvc?t=14s

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Ex.1/ 05:45 FS negra back
Ex.2/ 04:53 FS tops
Ex.3/ 00:14 topic
Ex.4/ 13:31 links and guitars by Stradivari


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Three-dimensional sound
https://youtu.be/yp15_iiIK5U?t=14s

Simplicio is the Stradivarius of Guitars
https://youtu.be/YQ1AKNdd8Ag?t=14s