Big G wrote:
I like the idea behind the stacked cones so to speak, but having never tried anything with this approach, I cannot say if it'll work well or cause issues with phasing or specific frequencies that will be enhanced over others?
I've used twin cone speakers in both PA and Hifi - it actually works to improve phase relationships between frequencies. I also used to have a very nice Cerwin Vega sub that had two voice coils on one driver, so you only needed one sub for both channels. I know this is a different idea, but the theory seems sound, so it should work well.