Jakub Klvač, better known by his stage name Kubus, is an American record producer, guitarist, and engineer originally from Přerov, Czechia. In January 2022, he founded the record label Lost Republic, based in Houston, Texas. He started with music by posting Juice WRLD type beats on platform YouTube when he was 13 years old.

Kubus released his debut project, TRAPSTAR in September 2022. It included features from his artist friends such as ilyaugust, Dillanm, and more. He followed up with the single, “Love Sick,“ featuring FOMELZ & N8F on October 28, 2022.

In January 2023, he released “Too Many” with LUXIIFER & Spirittx. On April 28, 2023, Kubus released his first studio mixtape, Lost Republic, which served as an introduction to his newly founded label of the same name and included all current members at that time.

Following the release of this mixtape, Kubus released his debut studio album on December 1, 2023 with all members from his label.