The in-cabinet M60s are meant to be set on the floor of the cabinet as the front baffle extends beyond the bottom of the speaker base. The speakers were designed to have the front baffle protrude in front of the cabinet it is mounted into as that front baffle has a lip all the way around for a slightly proud placement in the cabinet.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70