He won one of the special prizes in the Francisco Viñas Singing Competition in 1986 and made his debut the following year in Palma de Mallorca as the tenor soloist in Carmina Burana.

Between 1991 and 1992 he sang in small provincial theatres in Catalonia where his roles included the Duke of Mantua in Rigoletto, Fernando in La favorita and Nadir in Les pêcheurs de perles.

[5][3][4] The major breakthrough in his career and his debut at Barcelona's Gran Teatre del Liceu came unexpectedly on 9 November 1992 when on 12-hours notice he substituted for the ailing tenor Fernando de la Mora in the opening night of Anna Bolena starring Edita Gruberova.

During the 1990s he made his house debuts in most of the leading opera houses of Europe, including the Teatro Regio di Parma as the Duke in Rigoletto (1994); Teatro de São Carlos in Lisbon as Fenton in Falstaff (1994); Vienna Staatsoper as Nemorino in L'elisir d'amore (1995); Teatro San Carlo in Naples as Edgardo in Lucia di Lammermoor (1996); Royal Opera House in London as Nemorino in L'elisir d'amore (1997); and La Scala Milan as Edgardo in Lucia di Lammermoor (1997)[6][4] By 2012, Bros had sung 60 roles on the opera stage and in recordings.

In 2005 Bros and his wife, the soprano María Gallego, gave a concert of zarzuela arias and duets at the Teatro Real Coliseo de Carlos III [es] in Madrid which was subsequently released on CD under the title Por Amor.