From reading prior comments I believe I understand the reasons to use TD15M (better for high crossover & greater efficiency) or TD15S (use with sealed alignment).
I am not so clear about differences between TD15X and TD15H apart from voice coil. I am interested in one of these models for the low bass. Max SPL is not an issue for me as I don’t play music extremely loud. If one model sounds better than another, I would look at that.
I’ll be using these at home, most likely in vented cab and probably looking to crossover to CD between @ 600Hz (if I buy Radian 950PB) or @ 1.2Khz (if I use my B&C DE250) in a two way (no sub).
What is the advantage of TD15H over TD15X (and/or vice versa)?
Lower bass and slightly smaller vented cab?
Is there an advantage in the type of voice coil used in one model over the other?
Sound quality differences?