Originally Posted by sundownz
Honestly I don't have a time frame -- but it is a goal of mine to re-introduce a strong XBL^2 driver to car audio and make it even better than ever by pairing it to our linear suspension platform
Sexy.. I actually had a daydream about a driver like that at one point, after I read about the large format spider and surround combo your using. XBL^2 drivers dont' need strong super tight supensions anyways since the motor will control the driver beyond xmax, it works out really well in your case, least it did in my head lol.
Most XBL^2 drivers have been plagued with issues, all things considered.. The early brahmas and XXX's and avalanches are low end monsters, but both have inductance based roll off. Having used all 3 none of them really need a LPF as they roll off sharply above 60hz anyways.
The later Brahmas added shorting rings, but had quality issues when they switched build houses.
The CSS line simply isn't a well designed driver.. Even with a "good" motor topology, the execution just isn't all that great..
Exodus Audio was doing some nice ones for a few years, what the newer Brahmas would have been like if quality wasn't a factor. However they are out of business and Kevin never got to push the envelope on what was possible now, with better baskets and spiders that are readily available.
SI's BM's are solid drivers in both iterations, but a different niche being completely SQ and shallow mount oriented.. Something more akin to a z4 with XBL^2 would be killer, but the motor has to be ridiculously strong with a large coil to keep powerhandling where most people want.. Probably even a 4inch coil at that point (speculation on my part there though)
Another daydream.. How much would it cost to get some Z4 baskets and spiders turned into passive radiators? With all the extra travel you gain though, you'd likely only need 1 compared to 2 standard ones.. Im guessing since the basket isn't off the shelf, it would be more than most in cost., but by how much... Feel free to PM on that one if needed.