Voice coil diameter have any effects on linear cone travel?

S

shadyJ

Speaker of the House
Staff member
Does larger diameter voice coils benefit drivers in any other way aside from just more coil wire length? I'm thinking it might help restrict the cone travel to a single plane of motion, in the same way that dual spiders do. Here is a statement from a product page for a Wilson subwoofer discussing its driver:
But the longer the cone excursion, the greater its tendency to generate vectors of movement beyond the piston-like single plane, which is the theoretical ideal. These extraneous cone vectors produce distortion. The dual-spider driver, which was first developed in a 12.5" design for the WATCH Dog, solves the issue by restricting woofer excursions to a single plane of motion.
Wouldn't a wider voice coil also stabilize its travel, and thus reduce distortion? Also what kind of distortion is generated from a less than perfect direction of motion?
 
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