The Sundown Audio X10 v3 has a bigger motor and graduates to the Zv5 coil. So also more linear Xmax. So more output and less distortion and more power handling vs. the Sundown Audio X10...
The Sundown Audio X12 v3 D1 has a bigger motor and graduates to the Zv5 coil. So also more linear Xmax. Which Means More output and less distortion and more power handling vs. the Sundown...