In 2005, when they were all aged twenty, The Sound Explosion co-headlined the first Nokia 'New School of Rock' Tour, with The Answer and Tokyo Dragons. The band also toured with The Datsuns, Hell Is for Heroes, The Mooney Suzuki, International Noise Conspiracy, Million Dead, The 5678's, Terrorvision and Kill Kenada.
The band signed to Red Ink (a division of Sony) in January 2006, and completed the recording of their second album with Paul Reeve in October of that year. After the dissolution of Red Ink, The SoundEx (as they were now known) signed with the independent label 'DR2 Records', and their second album, Palomino, was released on 13 October 2008.
The SoundEx broke up in 2008. Lead singer Glen Roughead went on to work as a NLP (Neuro Linguistic Programming) coach, based in Newcastle upon Tyne. He continued to perform, both as a solo musician (under the name, 'Ruffhead Acoustic'),