Boston has always been an arena rock band. Even when they were just a fledgling group in Boston, the band’s music needed to be performed live on a grand scale. Nearly 40 years later and out on this summer’s Heaven on Earth Tour, Boston comes through the Spokane Arena next week prepared to play as loud and as big as they always did. Founding member Tom Scholz is still there, along with two members who have been part of the group for 20-plus years. People who lived through the 1970s and ’80s will absolutely revel in this show, which features all of the big hits like “More Than a Feeling” and “Amanda” and songs off of the 2013 release Life, Love & Hope.