John Warren Geils Jr., the founding guitarist behind the ’70s and ’80s rock powerhouse J. Geils Band, died at his longtime home in Massachusetts on Tuesday.

Geils founded his eponymous band in 1967, when he attended the Worcester Polytechnic Institute in Massachusetts.

The band – with singer Peter Wolf – was known for its deft, bluesy guitar work.

“We were a rock, blues, R&B, rootsy band until we developed our own sound,” Wolf told The Times in 1994.

The band would go on to land 10 top-40 singles in its career.

Though it occasionally reunited, Geils broke with the band when it toured under his name without him.