Defeated Sanity is a German technical death metal band from Dachsbach, Bavaria that was conceived in 1993 by guitarist Wolfgang Teske and his son, drummer Lille Gruber.

Defeated Sanity was founded in Dachsbach, Germany in 1993 by guitarist Wolfgang Teske and his son, drummer Lille Gruber.

[8] After undergoing a line-up change, Defeated Sanity eventually recruited guitarist Christian Münzner and bassist Tino Köhler.

Defeated Sanity released a 7-inch split EP with Brazilian death metal band Imperious Malevolence through Merciless Records in 2003.

Diabolical Conquest said, "Prelude to the Tragedy is a gleaming chrome harpoon of immaculate technical death metal, deftly interweaving cryptic riff-tangles with convolutional percussive violence to surprisingly comprehensible and utterly enjoyable results.

Drum work, relentless in its complexity, enhances both the progressive and barbaric elements of the tracks, nailing ambitious patterns to them with satisfying snare punch, lucid cymbals and expert fills.

[11] Defeated Sanity underwent further line-up changes with Jens Staschel joining on vocals, Christian Kuehn on guitar and Jacob Schmidt filling in on bass.

In the meantime, Gruber played drums for Austrian blackened death metal band Belphegor on their North American tour with Unleashed and Krisiun.

[13] Like its predecessor, the album received mixed reviews, with Erik Thomas of webzine Teeth of the Divine saying, "With ultra-deep, almost grindcore styled burps layered over complex yet savage riffs, Defeated Sanity, unlike some of their US peers, do manage to throw in some nice grooves and lurches amid the blasting carnage, hence the Suffocation and Devourment comparisons, but otherwise, Psalms of the Moribund is a pretty breakneck assault of squealing, pinch harmonics and ravenous blast beats.

"[14] Chronicles of Chaos reviewer Kostas Sarampalis criticized the vocal style of Jens Staschel, stating, "The constant low guttural growling is completely unintelligible, used more like a (very blunt) instrument rather than a means to convey lyrics.

[21] Beginning in late 2015, Defeated Sanity embarked on a headline U.S. tour, performing their first concert shows in the United States since 2008.

Prior to him officially joining, Welshman provided vocals on the band's two US tours, the Obscene Extreme festival as well as other shows in Europe and Indonesia.

[29] Gruber described Brodequin’s lyrics as "dark and brutal", which fit with Defeated Sanity's gore imagery and said that it’s an “awesome concept”.