Extremum was founded in 1998, Bulgaria, Sofia.
Initially its members are: Aleksandar Mladenov (Sasho)- lead vocal Boris Grudev (Bobby)- guitar Mladenka Grudeva (Denny)- bass and back vocal Anton Radoslavov (Tonny)- drums In 1999 Sasho leaves the band and Denny becomes lead vocal. At the end of 1999 Tonny leaves. From 2000 to 2003 Julian Nedkov (Juli) plays the drums. From November 2003- to March 2010 Extremum's drummer is Stoyan Petrov. Krasen Ivanov plays bass with the band- 2009-2010. April 2010- October 2011 - Lubomir Tomov plays drums with the band.
Extremum now are:
Denny- bass & lead vocals
Bobby- guitars & back vocals
Dimitar Dimitrov (Mitko)- drums

They took part in:
'Go Fest'- Burgas, Bulgaria- 2000 -'Christian Art Fest'- Kazanlak, Bulgaria- 2000 - 'Look unto Jesus' Fest- Balingen, Germany- 2000 - Koncert in Central Prison- Sofia, Bulgaria- 2000 - 'SOZO' Festival- Baja, Hungary- 2001, 2002, 2003, 2004, 2006 - 'LIME' Fest- Memphis TN, USA- 2002 - Outdoor live in Atlanta GA- 2002 - 'THE UPPER ROOM' club- Farmersville TX- 2002 - 'New Generation' fest- Romania- 2002, 2004, 2008 - 'Rock Gospel Tour'- Bulgaria- 2002 - Bike Festival- Yambol, Bulgaria- 2002, 2003 - 'Rock in Rila' fest, Beli Iskar, Bulgaria- 2003, 2004, 2005, 2006 - 'PraiseFest', Sofia, Bulgaria- 2004, 2005 - 'Kristfest' Festival in Osijek, Croatia- 2005 - 'Berkstok' Fest, Berkovica, Bulgaria- 2005 - 'Union' Fest, Varna, Bulgaria- 2005 - 'Rok Predel' Fest, Bansko, Bulgaria- 2005 - 'Berkrok' Fest, Berkovica, Bulgaria- 2006, 2007 - 'Septembarska', Novi Sad, Serbia- 2006 - 'Spirit of Burgas' Fest, Burgas, Bulgaria- 2008. Extremum support "No Longer Music" 2011 Europe tour in Razgrad, Isperih, Lyaskovec and Veliko Tyrnovo BG. Many single live performances and local clubs all over Bulgaria.

The band made their own first maxi single 'Deep Satisfaction' (4 songs) in Bulgaria, Plovdiv- studio 'Sound Design'- 2001. Producer Sasho Jelev. Published by 'Musik-Galerie'.
Single 'That's His Name'- recorded in 'Graffitti' studio- Sofia- 2003. Producer 'Graffitti studio'.
Maxi single 'In the Day' came up and is on the market since 11.11.2005. The CD has 4 songs and multimedia including: bio, info, photos, lyrics and MP3. The records were made at 'Negativestudio'.
On 17.01.2006, the band recorded 'Fly again', a song especially for the 2006 Eurovizion Contest. The most interesting thing about it that for a first time here they use a folk-lore instrument (bagpipe). The recording was done at the 'Negativestudio', Sofia.
2008- The single 'Awake from the dream' came up. The song is recorded with the help of the girl band 'Strrings', wich is the second project they have worked on together after 'Bring back the past'.
2009- New album "Not the end" came up in September.

Extremum combines a modern beat, with a powerful sound and the melody of alternative rock. Their style is a combination of different musical influences along with their own ideas. Their lyrics are inspired by Biblical message, expressing their faith in Jesus Christ.