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Older Infinity subwoofers--what is a servo sub?

Have been looking at used subs and have the opportunity to purchase two Infinity models--

the RS 10 (from the Reference series)

10" Servo Subwoofer

Infinity says they are both basically good products, but since servo subs are not in the mainstream of what I've seen I have questions? Anyone have experience or knowledge of the older Infinity stuff?
salby6

Showing 1 response by kr4ef94

kr4ef94
208 posts
 
Servo subs are now more in the mainstream than they used to be and Infinity (Arnie Nudell, actually) was a pioneer in this. Basically, the servo sub has a device (accelerometer or sensing coil) that feeds info back to the amp/controller so that errors in performance are correctable. That's a simplification and there are many paradigms for this correction.

OTOH, I have no first hand experience with either of these models.
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