JohnK,

The design goal for the VP160 was to be a seamless match for M60s. This would seem somewhat straightforward since all the drivers are the same, but because the driver configuration is not identical this means adjustments to the cross-over need to be made to compensate for off-axis variations. To do this we do not really change the cross-over points, but we do adjust the slopes.

Below is a graph showing a comparison of both the listening window response (an average of the curves in a narrow sphere around the forward axis) and the sound power (an average of on-axis and all off-axis measurements).

For the double blind listen testing we used a 3rd M60 to compare to the VP160 to ensure a proper blend across the front was achieved.



Ian Colquhoun
President & Chief Engineer