Shims
Shims available to allow alignment of speaker and backbox with any thickness plasterboard other than 12.5mm (1/2″) (or multi-layered build-up), ensuring that no more than 2mm plaster is applied to the front of a plaster-over loudspeaker.
May also be used for alignment in a retrofit installation or alignment of Edge Series speakers.
LOUDSPEAKER SHIMS:
These should be used where plasterboard thickness is greater than 12.5mm (1/2″), these will push the speaker forward.
To calculate correct loudspeaker shim requirement:
(Total plasterboard thickness) – 12.5mm = Shim thickness required
Example:
Double skin 12.5mm board: (2 x 12.5) – 12.5 = 12.5mm speaker shim
BACKBOX SHIMS:
These should be used where plasterboard thickness is less than 12.5mm (1/2″), these will push the backbox and speaker assembly to the rear.
To calculate correct backbox shim requirement:
“12.5mm” – (total plasterboard thickness) = Shim thickness required
Example:
Single skin 10mm board: 12.5 – (10mm) = 2.5mm backbox shim
Please specify shim type, backbox size (CV345/300/200) and required shim thickness at time of order