Jesse Kardon, better known by his alias Subtronics, is an American dubstep DJ and producer from Philadelphia, United States. He is best known for his song "Griztronics", a collaboration with Michigan-based electronic music artist GRiZ that peaked on Billboard's Hot Dance/Electronic Songs at the No. 9 position in late 2019. Kardon peaked at No. 10 on Billboard's Next Big Sound chart in September 2019.
Kardon is known for his mixtape series Now That's What I Call Riddim, though he has stated the mixes are not riddim despite the name. Originally released in February 2017, the series has grown to five volumes, with most containing mashups, exclusive mixes, and unreleased music as well as various DJs and producers introducing themselves during interludes. The fourth iteration, Now That’s What I Call Riddim Vol. 4, contains around 110 songs from a large number of artists. A fifth installment was released in January 2020. Kardon marked it as the last in the mix series and included songs by Skrillex, Excision, Doctor P and Boogie T.
On April 28, 2017, Florida-based dubstep producer Midnight Tyrannosaurus collaborated with Kardon to release the song "Revenge Of The Goldfish" via Never Say Die's Black Label imprint. The song was released for free as part of Never Say Die's sixth Black Friday compilation extended play and sampled a speech originally by Klaus Heissler during an episode of the American animated sitcom American Dad.
On April 20, 2018, Kardon released his seventh extended play Wook Laser via Never Say Die's Black Label sub-label. The 4-track extended play was well-received, with it being described as encapsulating "everything that is right in riddim at the current moment" by an EDM Sauce editor.
On July 6, Canadian electronic music duo Zeds Dead and American DJ and electronic dance music producer Jauz released a remix album of their song "Lights Go Down". Kardon's remix of the song was featured on the album, alongside remixes from by Sikdope, Duke & Jones, Gentlemans Club, Jarvis, Lick, Sqwad, Awoltalk, and Spirix.
In mid-August, Kardon's SoundCloud account was hacked and as a result, had various unreleased and private songs stolen and published by the hacker. Before, he had received a message from Los Angeles-based dubstep producer Megalodon, asking him to repost a song uploaded by an unfamiliar account. After privately messaging him, Megalodon told Kardon that he was hacked and soon blocked him. The same account later published a song by Kardon that was previously only accessible from his hard drive and private SoundCloud account.
On October 19, American record producer Herobust released a remix album of his previous song "WTF". The album, titled WTF VIP + Remixes, featured Kardon as a remix artist.