Equinox produced Styx's first single with A&M, the highly spirited "Lorelei," which found its way to number 27 on the charts. Although it was the only song to chart from Equinox, the album itself is a benchmark in the band's career since it includes an instrumental nature reminiscent of their early progressive years, yet hints toward a more commercial-sounding future in its lyrics. "Light Up" is a brilliant display of keyboard bubbliness, with De Young's vocals in full bloom, while "Lonely Child" and "Suite Madame Blue" show tighter songwriting and a slight drift toward radio amicability. Still harboring their synthesizer-led dramatics alongside Dennis De Young's exaggerated vocal approach, the material on Equinox was a firm precursor of what was to come . After Equinox, guitarist John Curulewski parted ways with the band, replaced by Tommy Shaw, who debuted on 1976's Crystal Ball album. ~ Mike DeGagne, All Music Guide
Styx (Producer), Styx (Main Performer), Styx (Remixing), Dennis DeYoung (Synthesizer), Dennis DeYoung (Keyboards), Dennis DeYoung (Vocals), James Young (Guitar), James Young (Vocals), John Curulewski (Synthesizer), John Curulewski (Guitar), John Curulewski (Vocals), Rob Kingsland (Assistant Engineer), Barry Mraz (Engineer), Barry Mraz (Production Assistant), Barry Mraz (Remixing), Chuck Panozzo (Bass), Chuck Panozzo (Guitar (Bass)), Chuck Panozzo (Vocals), John Panozzo (Percussion), John Panozzo (Drums), John Panozzo (Vocals), Doug Sax (Mastering), Roland Young (Art Direction), Chuck Beeson (Design), Junie Osaki (Design), Chris Micoine (Photography)