|Western Electric Horn Loudspeaker|
Avery makes mention of Jethro Tull in the article. I did not know this when I uploaded a youtube video of the Sound Transformer playing an excerpt of "Thick As A Brick" by Jethro Tull. This video is thirteen minutes long.
If only we could have heard this band through a system like this back in the day. Well, we can hear it now through the Stereo Fireplaces :)