Threat Signal sit comfortably next to contemporaries like Fear Factory and Lamb of God. Threat Signal were formed in 2003 by singer Jon Howard and his cousin, lead guitarist Rich Howard, filled out with rhythm guitarist Kyle McKnight, bassist Marco Bressette, and drummer Adam Matthews. After achieving some early notoriety in the international online metal community, with four of their demo tracks achieving heavy airplay on various websites, Threat Signal released the Rational Eyes EP through the digital-oriented label Gomek Records in 2005. Although Threat Signal signed with the respected metal indie Nuclear Blast Records and recorded their first album with Fear Factory guitarist Christian Olde Wolbers later that same year, a period of personnel instability delayed its release for nearly a year. Drummer Adam Matthews was the first to leave, replaced by George Parfitt. Then founding guitarist Rich Howard split, with Bressette taking over lead guitar duties while Pat Kavanagh was drafted into the bass slot. Following the delayed release of debut album Under Reprisal and an extensive tour, Bressette left Threat Signal suddenly in March 2007, as did drummer Parfitt, the latter of whom cited family reasons. Undaunted, Threat Signal began demoing material for their second album while auditioning new members, eventually settling on a lineup consisting of Howard, Kavanagh, drummer Norm Killeen, and guitarists Travis Montgomery and Adam Weber. The resulting Vigilance was released in 2009. Weber and Killeen left the fold the following year, and were replaced by drummer Alex Rüdinger and guitarist Chris Feener, who made their first studio appearances on the group's eponymous, Zeuss-produced third full-length outing in 2012. More lineup changes heralded the arrival of 2017's Disconnect, which saw Rüdinger being replaced by Our Lady of Bloodshed drummer Joey Muha, and touring guitarist Matt Perrin taking over for Feener -- Muha left the group to join Jungle Rot before the recording, and was succeeded by Andrew Minarik.