Real world feedback on THAM12 vs MTH30

ehhh. I know, I have a frequency hole problem. Trying to avoid a 4 way system tho. So trying to find tops that do some lower work....

Im actually in "wow" mode reading through the SynTripP thread. Jaw dropping really. I can understand the basics of FLHs, and now THs, But the SynTripP design is outside of my realm of understanding, on how its doing what its doing...