in excess of one million copies, attaining platinum status. Often cited as 'America's answer to Led Zeppelin', it is held to be influential amongst hard rock and heavy metal band Iron Maiden who have recorded and/or performed cover versions of songs from the album. Montrose was initially managed and booked by Dee Anthony. The first member to leave the original Montrose lineup was bassist Bill Church, who was replaced by Alan Fitzgerald for the band's second album, Paper Money (1974), also produced by Ted Templeman. Already disenchanted with what he perceived to be the one dimensionality and commercially waning popularity of the group's hard rock/proto-metal sound, Ronnie Montrose insisted on changing the formula for Paper Money by broadening the stylistic, compositional, rhythmic, and sonic range of the band, and generally toning down the high-energy intensity and metallic crunch that defined the group's first album. Despite its significant stylistic departure from the band's iconic debut, lukewarm response from critics, and mixed reactions from fans, Paper Money initially sold twice as many copies as Montrose. It was the band's highest-charting release, reaching No. 65 on the Billboard 200. After building acrimony between guitarist-founder, Ronnie Montrose, and vocalist, Sammy Hagar, reached a peak during the band's 1974–75 European tour, to promote Paper Money (as part of the Warner Bros Music Show package which also featured Tower of Power, Little Feat, and The Doobie Brothers), Hagar parted ways with the group in February 1975. He was replaced by Los Angeles-based vocalist Bob James. Seeking to further expand and change their sound, the band also drafted keyboardist Jim Alcivar. The Paper Money rhythm section of drummer Denny Carmassi and bassist Alan Fitzgerald remained. The new quintet line-up of Montrose made their live debut in San Francisco at Winterland Ballroom on April 5, 1975. At this juncture, the group parted ways with producer Ted Templeman. Montrose released two more albums, the Ronnie Montrose-produced Warner Brothers Presents... Montrose! (1975) and Jump On It (1976), produced by Jack Douglas, known for his work with Aerosmith. Both albums feature Bob James on vocals and Jim Alcivar on keyboards. On the Jump On It album, Alan Fitzgerald was replaced on bass by Randy Jo Hobbs, and the subsequent tour to promote the album saw the band performing as a four-piece without a bass player, utilizing Jim Alicivar for keyboard-bass. Under the high-profile management of impresario and concert promoter Bill Graham,