The alternative is to get some 1x4 boards and make a picture frame with a cross board going across the middle. Glue down the safe and sound then wrap with speaker fabric. Make several and hang them to your wall. Easily removable.

LFR1100
VP180HP
EP600
M3 In Ceiling x 4
M5OW
M2 - Atmos rears
ADA1500.5
M3 Outdoor Speakers
ADA 1000.8