Turino 2003, Sheehy 2005, de la Mora 2006, Jáuregui 2007). The mariachi ensemble generally consists of violins , trumpets , an acoustic guitar , a vihuela (a high-pitched, five-string guitar), a guitarrón (a large acoustic bass) and, on occasion, a harp. They dress in silver studded charro outfits with wide-brimmed hats.