Commentators and industry observers noted that
Phantom Singer was met with negativity from traditionalist factions of the classical music community but was enthusiastically embraced by the younger generation of classically trained singers. The enthusiasm arose from a dissatisfaction with the unspoken restrictions on what repertoire they were supposed to perform as "classical musicians" and they saw
Phantom Singer as a platform to collaborate with fellow musicians and utilize their skillset without limitations. The show gained notoriety within the domestic classical music community due to the large number of classically trained singers and voice majors participating as contestants and the presence of opera singer Son Hye-soo in the panel of producers. Of the final twelve contestants from each season, more than half were classically trained. Seasons 2 and 3 notably featured contestants who had been winners or finalists at prestigious vocal music competitions abroad, held postgraduate degrees in voice or were already establishing themselves at various opera houses in Europe. Despite the global success of
The Three Tenors and
Il Divo, the domestic classical music community was still largely conservative and segregationist and frowned on voice majors performing popular music due to a prevailing prejudice that classically trained singers who ventured into popular music would lose their singing skills. Such attitudes persisted into the 2000s, with tenor Park In-soo being infamously expelled from his opera company after collaborating with folk singer Lee Dong-won for the 1989 hit "Nostalgia" () while musical theater veteran and crossover singer
Kai, a voice major from
Seoul National University and the first crossover recording artist to top the domestic classical chart and chart in the top 30 of the
Gaon Album Chart, faced considerable opposition from most of his professors when he shunned a career in opera. While crossover vocal groups have existed prior to
Phantom Singer, the quartets formed on the show continue to enjoy much more mainstream popularity and regularly appear on weekly televised music programs such as
Open Concert and
Immortal Songs: Singing the Legend. According to statistics compiled by the Korea Performing Arts Box Office Information System (KOPIS), concerts by
Phantom Singer participants dominated ticket sales within the "classical and opera" category for the first half of 2021, despite
COVID-19 restrictions. The decrease in ticket sales of other classical musicians and groups, in contrast to those who appeared on
Phantom Singer, have prompted observations that the domestic classical music industry has failed to adapt marketing and presentation strategies to attract a new generation of concert-goers or overcome the perception about classical music being "boring". ==References==