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Eric Carmen, whose plaintive vocals soared above the crunching guitars of the 1970s power-pop pioneers the Raspberries on hits like “Go All the Way,” and whose soft-rock crooning later as a solo artist propelled anthems like “All by Myself” and “Hungry Eyes,” has died. He was 74.

His death was announced on his website by his wife, Amy Carmen. She did not give a cause or specify where he died, saying only that he died “in his sleep, over the weekend.”

The Raspberries formed in Cleveland in 1970. With the preternaturally melodic Mr. Carmen churning out hits and serving as frontman, the band represented a throwback of sorts, in terms of both sound and image.

Emerging at a time when FM radio playlists tilted toward the thundering blues-rock of Led Zeppelin and Deep Purple; the orchestral pomp of progressive rock bands like Yes and Emerson, Lake & Palmer; and the glittery glam rock of T. Rex and David Bowie, the Raspberries recalled the intricate songcraft and lush melodies of the mid-’60s pop masters.

“I had spent my youth with my head between two stereo speakers listening to the Byrds and the Beatles and later on the Beach Boys,” Mr. Carmen said in a 1991 interview published on his personal website.

Even more retro was the band’s look: They initially wore matching suits — a concept that had seemingly gone out of fashion with Herman’s Hermits, although in their case the suits looked more like harbingers of John Travolta’s discowear from “Saturday Night Fever.”