1) Barbershop quartet 
[A`capella Quartet] Fourmidables is a Spanish a capella quartet, created in Torrevieja, province of Alicante, in 2008. This quartet is a member of SABS (Spanish Association of Barbershop Singers). Fourmidables has twice been the silver medal winner at the Spanish Quartet Competition, and placed 5th in the 2013 European Barbershop Convention...