Forte di Quattro have held a series of summer and winter concerts. The summer concerts "Unplugged" was conceived to showcase each members' singing abilities and they perform in a concert hall without any microphones. The winter concerts "Notte Stellata" features a full orchestra accompanying them. Members Ko Hoon-jeong (고훈정) – baritone Kim Hyun-soo (김현수) – tenor Son Tae-jin (손태진) – bass-baritone Lee Byeo-ri (이벼리) – tenor Discography Studio albums Reissues Extended plays References External links Artist Profile and Discography on Melon K-pop music groups Musical groups from Seoul Musical groups established in 2017 2017 establishments in South Korea Vocal quartets Opera crossover singers