i have a pair of Dayton Audio PC83-8 burning a hole in my pocket. the speaker cutout is almost exactly the same as 3” pvc so i thought no brainer, lets make a transmission line to play with. then as always, i got to thinking to much. there are these T joints at the home depot. that would double the area everytime i doubled up on the pipes. that sounds like a horn to me. so my question is, with 14 T joints i could double the area of one speaker 3 times and make the length in between each doubling anything i want, would this make a decent backloaded horn? doubling again would be cost prohibitive. or would it be more like an expanding tapered TL? which seems like a bad idea. i wouldn’t be getting the benefit of the end of the horn pointed at the listener, but i was thinking id get some benefit from the impedance coupling with the room. i could probably buy all the pipe and fittings for 75-100usd.