Originally Posted by DS-21
To my knowledge, none of them do. Which is a good thing.
A servo system on a sub is a bad compromise. Lower 2d order distortion down low (where it's perceptually unobjectionable) coupled with restricted top-end bandwidth.
So better to just use a good driver than cobble up a flawed electronic compromise.
Did you say that because of the CEA max burst tests found on audioholics? You seem confused about servo. Low second order distortion is more dependent on the motor and maybe flux modulation, no?
Originally Posted by Test123455
That's pretty interesting, thanks! Wonder why Rythmik subs use them then. Or why did he (funk audio founder) say hes gonna add one to that super sub?
Looking forward to your response! Trying to decide what my future sub will be.
There are different forms of servos too. Nathan Funk stated it is not a servo since it measures the internal and external air pressure somewhere not found on the driver. If you are really curious about servo, I would start a new thread. I will say that servos main advantage is not about reducing low order harmonic distortion
Hope the prototype with differential pressure control works out. I'll be interested in learning more about it once it progresses.