Abstract: An electric guitar has a lighter weight and a smaller body thickness profile than electric guitars in predominant use today, while maintaining superior sustain and tonal qualities. Favorable inertial environments are constructed to enhance the sustain and tonal qualities of the guitar, by firmly securing a metal plate on the top of the guitar body surface, on the area surrounding the string fastening means at the body end, then firmly securing a second metal plate on the top of the guitar head surface, on the area of the string fastening means at the head end.