http://www.andalusianguitars.com/FS1929L-1-spruce-boxwoodb-hayaf-tulipwood-natural-13.html
"Sound Portal" Your Way out of obsolete contracted flamenco guitars http://youtu.be/ip1oYKzrxLM?t=14s
Sound Portal is THE Asset http://youtu.be/PJLTqE_-pxI?t=14s
One of the most obsolete things in my opinion is a single orifice guitar.
If you want to have a referral about sound portal guitars ask those who have and play such sound port guitars
(don't ask those who doesn't own it, because they really can't tell anything about...even if the "tried it" because the gifts of the doble boca you can't explore just in one or two days, I am still discovering its benefits after years of playing sp)

Conditioned by habit http://youtu.be/q_MkQjgbjUM?t=14s
Flaw Detection Guidelines http://youtu.be/5Pw4mNtVHeU?t=14s

Mind-blowing vs mind-numbing guitars
https://youtu.be/DXcb4B4Jitw?t=1m9s
Without playing at our level how a Luthier knows what is play-ability for us...? http://youtu.be/z3Ps3U1jT5I?t=14s

Sound portal update / Bi-directional doble boca
https://youtu.be/g0GVnDsOtAs?t=14s

Ex.1/ 00:14 solo 1 (FSL Chorruelo by Paco de Lucia)
Ex.2/ 01:14 solo 2 (MB Buleria by RD)
Ex.3/ 02:02 solo 3 (MB Rio Ancho by Paco de Lucia)
*Ex.4/ 17:59 solo 4 (FSL Rio Ancho by Paco de Lucia)
*Ex.5/ 13:06 (MB Variations on El Chorruelo by Paco de Lucia)
Ex.6/ 18:55 (FS Palenque by Paco de Lucia)
Ex.7/ 06:03 testing distances and presence
Ex.8/ 14:17 topic

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

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

The elusive soul of the guitars/Andalusian soundboard tuning (Torres La
Leona/Benno Streu)
https://youtu.be/X3U_Xg-j67Y?t=14s

.....

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