Is it safe to install Sonos 8 inch speaker in the drywall without any reinforcement? They weight 9lbs each and will be installed on double drywall ceiling without additional bracing/reinforcement on a retrofit project.
Sonos by Sonance 8 inch Installation
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+9I think you need to check the structure limitations. Asking Google the mentioned structure supports from 15/25 kg/m2, so it should be ok as the speaker is 4 kg. But check it with a professional to be sure.
Sorry for the SI units 😉
They should be good in a standard drywall ceiling, doubled is going to be fine.
From the Guide, page 2:
https://www.sonos.com/pdfs/productguides/en-us/sonos_in_ceiling_by_sonance.pdf
3. Make sure all the Roto-Lock toggle feet are retracted so that they are tucked within the mounting hole’s border. Insert the speaker into the hole in the ceiling (see Figure 5). The RotoLock system can accommodate a ceiling material thickness of 1-1/4” (32mm) with the toggle foot cap removed the system can accommodate a ceiling material thickness of 1-7/8” (48mm).
4. When installing into double drywall or other thicker ceiling materials, you may need to remove part of the two-piece toggle feet. Use a small screwdriver to gently release the two locking levers
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