Nicolaas Douwma, better known by his stage name Sub Focus, is a Scottish English DJ, record producer, songwriter, musician and sound engineer. He has been releasing records since 2003. On 12 October 2009, he released his self-titled debut album. He released his second album, Torus, on 30 September 2013. Douwma's album in collaboration with Wilkinson titled Portals was released on 9 October 2020 through Casablanca Records. His fourth album, Evolve, was released on 12 May 2023.

Torus is the second studio album by British DJ and record producer Sub Focus. The album was released on 30 September 2013, through RAM Records, Mercury Records and Virgin EMI Records.