Hartley Peavey founded Peavey Electronics, one of the world's largest manufacturers and suppliers of musical and professional audio equipment, in 1965, having built his first amplifier in 1957.
Gibson is an American manufacturer of guitars and other musical instruments.
Switchcraft is a leading supplier of a broad line of jacks and plugs for audio applications.
MXR is a manufacturer of effect pedals based out of Rochester, New York. Their pedals are known for their utilitarian designs and rugged stompboxes.