Atmos ceiling speaker install help needed

TheFridge

Active Member
Hi folks,
So I got a room that was being renovated wired for 2 atmos speakers ( should have done 4 but wasn't thinking)

Anyway I have to try install them. I pulled the cable but then wasn't here when the work was done. Electrician never installed as I didn't have them at the time.

I'm very nervous about cutting the ceiling as if I hit a rafter I may as well pack up my bags and move out πŸ™ˆπŸ™ˆ.

Attached is the diagram and I have spoke to the elec and confirmed that the measurements are to the centre of a rafter.
But then I stupidly checked with a stud finder and its telling me different.... (although I don't trust it)

What would you do??
 

Attachments

Harkon321

Well-known Member
I've never had much luck with stud finders. Could be picking up something else - a noggin, a pipe, a cable.

Got a few choices I guess, beyond just going for it.

Carpet up upstairs and look from above.
Drill tiny holes in the plaster to accurately confirm exact location of the joists.

Does the builder know if those 2 locations are clear? I found heating pipes above my living room caused me issues.
 

TheFridge

Active Member
Think I might have it. Used a magent to locate plasterboard screws. So can find the studs that way... Returning this stud finder that's for sure.
Will update in the afternoonπŸ™ˆπŸ™ˆπŸ”¨πŸ”§πŸ”©
 

AmericanAudio

Active Member
AVForums Sponsor
Ok, so I always cut ceiling speaker holes with fear and trepidation. so this is how I do it.

1. Markup Speaker Cutout on the ceiling.
2. Starting from the middle make a single cut working out to the marked limit for the ceiling hole.
3. Go back to the middle, rotate blade 90 degrees from previous cut, cut again to the marked position.
4. Repeat step 2
5. Repeat step 2
6. Now cut around the edge of the cut out with far more confidence you are not going to hit anything.

If you hit anything while cutting out the first 4 cuts, you can adjust in the opposite direction.

If you do need to adjust, its is only a line and not a hole so far easier to fill and make good.

Hope that helps.

Chris.
 

Damp Squid

Active Member
Drill a small hole where you want install the speaker. Bend a piece of wire or coat hanger to a 90 degree to the same radius as the cut out and poke through the hole and rotate. Pray it doesn't snag on anything.
 

AmericanAudio

Active Member
AVForums Sponsor
Drill a small hole where you want install the speaker. Bend a piece of wire or coat hanger to a 90 degree to the same radius as the cut out and poke through the hole and rotate. Pray it doesn't snag on anything.
Did that once and then the padsaw hit suspended beams, whole ceiling had been battoned out and the coat hanger was just low enought to sweep underneath the beams! Much confusion when we started to cut and hit stuff.
 

Damp Squid

Active Member
Push it up high enough to ensure there is enough room above the ceiling for the speaker. Worked for me.
 

John7

Well-known Member
If it's a flat roof, there should be a load of insulation material in between the joists - that may cause you an issue with sawing the holes......
 

Damp Squid

Active Member
They should be flush once they have been tightened and the legs grip the plasterboard.
 

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