Subwoofer bases designed by Dan D'Agostino, using two servo-controlled 12" woofers with Krell amplification.
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 Audio • Servo subwoofer products
Rythmik L22 Direct Servo Subwoofer Review. Best for narrow space applications. - YouTube
Velodyne DD10 10 Inch (10”) Servo Subwoofer | eBay
Direct Servo Subwoofers - YouTube
Amazon.com: Traxxas TRA2065X Servo, sub-Micro, Waterproof, Metal Gear : Toys & Games
Servo-Control in Mainstream Audio: From Motional Feedback to the Bend-Sensor | audioXpress
Servo-Control in Mainstream Audio: From Motional Feedback to the Bend-Sensor | audioXpress