How Do You Spell DIFFERENTIAL BASE?

Correct spelling for the English word "differential base" is [dˌɪfəɹˈɛnʃə͡l bˈe͡ɪs], [dˌɪfəɹˈɛnʃə‍l bˈe‍ɪs], [d_ˌɪ_f_ə_ɹ_ˈɛ_n_ʃ_əl b_ˈeɪ_s] (IPA phonetic alphabet).