How would the angle of the subducting plate influence the geographic location of the ociated volcanic arc?

Considering the dynamics at convergent plate boundaries where subduction is occurring, how would the angle of the subducting plate (as measured from horizontal) influence the geographic location of the ociated volcanic arc? Also, if the angle of a subducting plate changed over time, how would this be expressed by the spatial distribution and ages of volcanic rocks produced by the subduction zoned?