ðə mˈeɪnstɹiːm θɹˈiːhˈʌndɹɪd sˈɪɹiz kəmˈɛnst ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti wˈʌn æz ðə lˈeɪbəl fˈoʊkəsst mˈoːɹ ˌɔn fˈʌŋk slˈæʃ sˈoʊl ænd dʒˈæz ˈɑːɹɾɪsts æz wˈɛl æz ɹiːˈɪʃuːɪŋ dʒˈæz ˌɛlpˈiːz ɚɹˈɪdʒɪnəli ɹᵻlˈiːst ˌɔn tˈaɪm ɹˈɛkɚdz bᵻfˌoːɹ ðə lˈeɪbəl fˈoʊldᵻd ɚɹˈaʊnd nˈaɪntiːnhˈʌndɹɪd sˈɛvənti sˈɪks.
The Mainstream 300 Series commenced in 1971 as the label focussed more on funk/soul and jazz artists (as well as reissuing jazz LP's originally released on Time Records) before the label folded around 1976.