Originally they both lived in Zoetermeer, a city in the Netherlands. In 2008, Minnaard moved to Norway with his fiance. Both Hagen and Minnaard still work together with the aid of internet technology and share projects together to create Signum tracks and DJ sets. Their first notable mainstream success was in 1997 with "What Ya Got 4 Me" (released on the Jinx record label), becoming a club anthem. This song was re-released in 2001 and entered the Top 40 of the UK Singles Chart.
Signum started out on the BPM dance label, and stayed with them until 2003 when the label was disbanded, they then signed a contract with Armada Music soon after.
With their success of "What Ya Got 4 Me", they continued to remix tracks and produce material including; "Forever", "Better Off Alone", "Take U There" and "On Stream". A lot of their work in this period did well in dance and club charts.[which?] Their next big achievement came when they collaborated with the British producer / DJ Scott Mac, to create "Coming On Strong", which again was a hit in the clubs. After this, they went to do remixes for ATB and Alice DeeJay.
With a large amount of remixes undertaken, they decided to start creating and performing their own material. Their DJ debut was in July 2001 at Gatecrasher in the UK, and they went on to play at various dance venues including 'Godskitchen', 'Gatecrasher', 'Passion' and 'Slinky'. They also played at several music festivals that year. Since their debut, that have played in the countries including Australia, Spain, Japan, Ibiza, Canada and Malaysia.
They were signed to Armada Music in the summer of 2003, and released their first single "Push Through" on the "A State of Trance" imprint. In 2004 Signum teamed up with female vocalist Anita Kelsey, and created "Come Around Again", another success, as well as being dubbed by Signum as "the track they've always wanted to make". 2005 saw a tour in Australia and New Zealand.
Signum also produce music under another alias 'D-Factor'. In 2008 Signum featured in the Top 100 in the DJ magazine's awards, finishing at #72 on the list.
Signum's latest album For You was released on December 3, 2010, by Armada Music.