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
$2k DIY subwoofer, oh my | Audio Science Review (ASR) Forum
Servo-Control in Mainstream Audio: From Motional Feedback to the Bend-Sensor | audioXpress
Rythmik Audio • Servo subwoofer products
Buy 2PCS AGFRC Micro 9g Servo Servo Motor Kit - Digital 11g Metal Gear Mini Servo for RC Helicopter Airplane Boat Controls, Control Angle 180 Online in Poland. B07V5XR55Q
Servo-Control in Mainstream Audio: From Motional Feedback to the Bend-Sensor | audioXpress
GR Research / Rythmik Direct servo subkit 2, subwoofer and amp Photo #2116005 - Canuck Audio Mart