Mounting the VP180 on the wall could be a problem for two reasons:

1) It is VERY heavy (same size and weight as the M80), and since the cabinet is so deep it would put a lot of torque on the mount.

2) It is rear ported. So you would need to mount it several inches off the wall, at least.
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2 M80s, 1 VP180, 4 QS8s, 2 EP800s, 4 Algonquins, 2 M3 VaSSallos