Hi Srajan, wow, another day, another truly epic review. I of course mean the Cobra piece you just put to bed. It's only when I saw the final photo of all the cones going into one pair that I fully appreciated what you called completely bonkers. I'm with you in that I can't name anything comparable out there. In past reviews you mentioned Mårten Design and Tidal Acoustics as two very high-end brands which run multiple passive radiators but even they don't throw this many at so small a model. Buchardt use just one and already that has reviewers in awe over the bass they get from it. Like Greg said at the end, it is strange that this driver type is still so underused. SInce he doesn't know why, I assume you don't have any ideas either? In any case, thanks for another very entertaining review. Markus
Correct. I'm no speaker designer to have any insight other than cost why passive radiators aren't more popular. Well, that and perhaps a shortage of prefab simulation software? Port behaviour is readily modelled. Is the same true for passive radiators relative to diameter, mass, enclosure size, placement and all the other parameters that must be considered? I was once told that one reason for the rarity of transmission lines is precisely that. They're not easily modelled correctly so unless one writes one's own predictive software, might require endless physical prototyping to nail down. And that could be prohibitive on cost and time when ports are so much cheaper and easier to do. Mind you, I'm just speculating. Srajan
