Peaking just ahead of the looming reggaeton wave, the Puerto Rican duo would soon go their separate ways. But for their final studio album, El Father and El Bambino let it all hang out. Amid the hardest of digitized beats and the occasional wolf howl, big-name guests Don Omar and Daddy Yankee lend swaggering support, the latter cresting on “Gata Salvaje.” And as a sign of reggaeton’s growing pan-Caribbean reach, “Tigresa” expertly swipes Jamaica’s “Bam Bam” rhythm right out from under Chaka Demus.