If you can set up the patio doors so the outside half does the sliding (ie right door slides left and left door slides right) you could put the M60s a couple of feet outside the hearth / stage and get :

- more correct distance between speakers
- nothing behind the speakers interfering with the port
- no crispy-critter M60s from the fireplace heat
- more hearth space in front of the fireplace for people


M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8