Homemade Rotary Speaker: Interchangeable Horns

This is a demo video showing some features of my homemade rotary horn cabinet. It shows the interchangeable horn feature and some routine maintenance. Two different shapes of horn are shown for sound comparison. For comparison, the audio tracks of the sound tests were not edited. So, this video contains some raw audio. Some speech parts had 10dB attenuation, cause I was holding the smartphone close to my head and the speech volume levels got too loud compared to the speech from the beginning of the video.