Q Mac gave the duo their first big break in Puerto Rico on the fourth volume of his famous compilation series "The Warriors".

After debuting with "Una Noche Mas" from Q Mac's album "The Warriors 4: Los 14 Guerreros",[2] the song was a local hit in Puerto Rican radio and caught the attention of many record producers as most people noticed the duo's similarity to popular reggaeton artists Zion & Lennox.

After working with DJ Negro on The Noise Live: Asi Comienza El Ruido and Mr. Notty (Money Machine) for the compilation "Ban-2 Korrupto", the success of these songs drove a bidding war between Puerto Rican labels to sign them.

[3] After being featured on reggaeton records with veteran labelmate Polaco, the duo received their first big break on an international scale in 2005 by working with the renowned artists Don Omar and Nicky Jam.

Soon afterward Chencho Corleone (from reggaeton duo Plan B) allowed R.K.M y Ken-Y to appear on his various artists' album "El Draft" co-executively produced with Boy Wonder (Chosen Few Entertainment).

[4] This newfound exposure built up anticipation for their debut album, "Masterpiece: Nuestra Obra Maestra" distributed by Universal Latino in partnership with Pina Records.

[7][9] The duo had many successful tours across the world for various years after "Masterpiece" including headlining the world-renowned Viña Del Mar International Song Festival in Chile.

In 2012 they released "Cuando Te Enamores" which became part of the most popular album of 2013 La Fórmula featuring Plan B, Zion & Lennox, Arcángel, Lobo and more, which was the last work of R.K.M & Ken-Y before returning as a duo in mid-2017.

On January 22, 2016, Ken-Y released his first solo album The King Of Romance which features Nicky Jam, Natti Natasha, and Manny Montes.

The singles that were released on this album were "Te Invito A Volar", "Sentirte Mía", "Fórmula De Amor", and "Como Lo Hacia Yo".

Under the command of its creator Raphy Pina the duo announces their return ready to fall back on the world with their unique style.

[15][16] The duo in October 2019 had their most recent hit "Cuando Lo Olvides" which peaked in the Latin charts this song goes back to their romantic roots.

From their return to separation (2017–2020) the duo has collaborated with huge stars like Arcángel, De La Ghetto, Daddy Yankee, Plan B, Natti Natasha, Ozuna, Noriel, Darkiel, Divino, Chris Wandell and Lyanno, and more.