Hello. Many years ago i was given this subwoofer, the speaker box without the servo amplifier. I purchased a couple of used Velodyne servos online but the system did not work. Later on a learned that the servo had to be calibrated to the specific driver and that there was a built in accelerometer on the driver to do the feedback required to reduce distortion. I still have the box, i would love to make it work. Amplifier technology has improved, before spending money and time, i would like to ask if the sub is worthy of it. I could buy a decent sub for a bit more than $1k but I rather no put this thing in the trash can if possible. The driver box and foam surround are in good condition. I was thinking of a hypex based plate amp with built in servo circuit. What do you think? Advice appreciated.