A high-ceiling reflective hall such as the dome of a mosque, a high church roof made from gypsum which will cause an echoing sound, stationing an ordinary speaker with an unorganized positioning will cause an inarticulate sound and low intelligibility. Sometimes, we can barely understand what has been said by the speaker on the stage. This issue leaves us searching the solution for rooms and halls which have a high resonant sound which is installing antidome speakers. This 300 watt powered full range speaker has mid-hi coverage only to downwards direction. If we apply several speakers antidome inside a dome, the result is, the intelligibility or the understanding of the audience listening to the speaker will be clearer.