November 6, 2011 5:00 AM

Tesla performs ‘unplugged’ at the Midland

Tesla didn’t invent the concept of the “unplugged” concert, but it helped coin it as a legitimate element in any band’s discography. Its 1990 album, “Five Man Acoustical Jam,” a mix of originals and well-known covers, is one of the band’s most successful. One of those covers - of the ‘70s nugget “Signs” by the Five Man Electrical Band - remains one of Tesla’s biggest hits.

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