I've made copies of the Bose Cannon for movie theaters. Used Sono tubes in 8, 10 and 12 inch diameter. At about 14 foot long, rather hard to hide. Thought about using the attic space above the living room ceiling, just never did that. still have a 10 inch model in the attic. Open at both ends, no build up of air pressure. Back then, when testing it, was watching a movie and a fog horn went off, very loud and realistic sound. Nelson tried a pair of 15 inch diameter Sono tubes in Grass Valley. Quite eleaborate with a thick marble base and the 15 firing up into what appeared to be a 10 foot tall tube. There are many roads to subwoofer nirvana. Currently using a swarm of 10s and a 12 for bass.
What Do You Think . . . and How Does It Work?
While watching vids on YouTube, I came across this pipe speaker design from a Dr. Linkwitz (see below). The sound of this speaker is said to be impressive. I was wondering if you know about this, how it works and what you think of this speaker design. Also, what do you think would be the best room placement for such a speaker, and would you be tempted to build them?
https://www.linkwitzlab.com/Pluto/intro.htm
https://www.linkwitzlab.com/Pluto/intro.htm