High Quality Content by WIKIPEDIA articles! A guitar technician (or `guitar tech`) is a member of a music ensemble`s road crew who maintains and sets up the musical equipment for one or more guitarists during a concert tour. Depending on the type and size of band, the guitar tech may be responsible for stringing, tuning, and adjusting electric guitars and acoustic guitars, and maintaining and setting up guitar amplifiers and other related electronic equipment such as effect pedals.