Pronunciation: [pɹˌiːkənsˈɜːʃən] (IPA)
Correct spelling for the English word "Preconcertion" is [pɹˌiːkənsˈɜːʃən], [pɹˌiːkənsˈɜːʃən], [p_ɹ_ˌiː_k_ə_n_s_ˈɜː_ʃ_ə_n] (IPA phonetic alphabet).
Correct spelling for Preconcertion