Truth, my life was changed after getting these subwoofers. Gr research open baffle servo sub with magnepan 1.6qr. (Also with the gr research crossover) seem less transition between them, unless you want
Rythmik F18 SE Direct Servo subwoofer 18″ - Choy Audio Visual
Rythmik L22 Direct Servo subwoofer Dual 12" driver HT/music sub - Choy Audio Visual