I posted recently about the curious naked speakers with the PRV 5MR450-NDY along with 18" woofers. Scroll down to the end of the following.
https://www.trans-fi.com/ob-speakersMore about the PRV here
https://www.parts-express.com/prv-audio-5mr450-ndy-5-midrange-neodymium-woofer-8-ohm--294-2705I'm thinking of doing something like this but without the very heavy 18" woofers. 44 pounds per woofer is way too much for me these days. And I don't play music that loud and mostly I listen to classical. I would just use one PRV per channel.
Instead, I am thinking of two options. I already have a couple of the Goldwood 18" woofers that Roscoe also used. I could get a couple more.
https://www.parts-express.com/goldwood-gw-1858-18-pro-woofer--290-386Or I could try the GRS 15" units with 4 for about $100.
https://www.parts-express.com/grs-15pf-8-15-paper-cone-foam-surround-woofer--292-415Both Goldwood and GRS speakers have a high QTS suitable for open baffle and they are relatively lightweight. I suspect that mounting the woofers facing each other creates some sort of SLOB effect which I seem to remember is supposed to lower the fs.
Suspending the speakers should not be too difficult. Certainly, I would not be doing all the steel pipe stuff. The speakers would be visually interesting and different.
In a small room it would not require too much power to run the PRVs and the woofers could be handled by a separate more powerful amp. Crossover with a Minidsp or similar.
Any comments or ideas.
ray