The second folded bass horn main assembly is essentially complete at least for preliminary testing. I have just posted a video recorded using a digital camera with a measurement microphone for a higher quality audio track than is attainable with the microphones built into the camera. The microphone is plugged into a Focusrite iTrack Dock. Set your headphone volume so the audio plays quietly at the beginning of the video because the volume gets louder when the microphone is closer to the horns later in the video.
This is Affordable Audio at it's best.