Since you re not stapling the actual speaker wire there s no risk of damage.
Tape to hang speakers on the wall.
Find double sided mounting tape at lowe s today.
Do this every few feet.
Place a tie on the wall where you want speaker wire to be held before stapling the tie across the middle.
Measure the foam panels and the wall where you re installing them.
Then take your measurements and mark out the area on the wall where you want to install them.
I used heavy duty drywall anchors to mount mine.
I think they re rated for 50lbs each.
Heavy duty duct tape may hold a google home mini against the wall but it s hardly the neatest way to mount your smart speaker.
Plenty of adjustability and easy installation.
For heavier speakers i ve used these guys in the past with excellent results.
Essentially you want to put as much distance as possible between the front of the speakers and the wall they face to eliminate reflections.
Nano tape double sided adhesive bigou wall tape gel sticky tack clear traceless washable reusable picture hanging strips for paste photos poster household kitchen holder 16 5ft 4 1 out of 5 stars 1 053.
Add some in wall speaker wire and some wall plates with binding posts and you ve got a nice clean install.
Now place the wire right above the staple and then fasten the tie.
Apply a small amount of tape to the wall in a place that may be more compromised say on a wall that s bombarded daily with direct sun.
You can trim excess tie lengths with a pair of scissors.