The Gibson portfolio includes Gibson, the leading guitar brand, as well as many beloved and recognizable music brands, including Epiphone, which has been on every stage since 1873, Kramer, the original MADE TO ROCK HARD guitar brand, Gibson Amps, the home of tone, KRK, behind great music for over 30 years, and Maestro, the founder of effect pedals. Basic guitar maintenance knowledge - changing strings, string height adjustments, ability to evaluate acceptable instrument playability and structural soundness, etc.