ISE 2020: dB Technologies Intros VIO C Series Two-Way Active Line-Source Speaker Array February 18, 2020 | Home / February 18, 2020 rave-video / ISE 2020: dB Technologies Intros VIO C Series Two-Way Active Line-Source Speaker Array Look in: ISE ISE 2020: dB Technologies Intros VIO C Series Two-Way Active Line-Source Speaker Array