107.9 The X is an active rock radio station serving Kauaʻi, Hawaii, launched in February 2023 on the former Hawaiian 107.9 frequency. It airs as the HD3 subchannel of KTOH 99.9 FM and is simulcast on the translator K300AT at 107.9 FM in Kalaheo, playing rock from the 1990s through today's new rock for men aged 18-49. The station is owned by H Hawaii Media.