"Difference between old-fashioned and Modern guitars" http://www.rdiaz.org/rd-art%207.html
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) Three-dimensional sound
https://youtu.be/yp15_iiIK5U?t=14s

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

^Ex.1/ 00:14 solo 1 (Buleria)
Ex.2/ 06:40 solo 2 (Almoraima+)
*Ex.3/ 01:23 solo 3 (Entre dos Aguas)
Ex.4/ 03:03 solo 4 (Entre dos Aguas)
Ex.5/ 15:14 solo 5 (Entre dos Aguas)
Ex.6/ 10:04 solo 6 (Taranta)

Ex.7/ 04:56 Three models
Ex.8/ 08:49 Internal design
Ex.9/ 10:47 topic