The optional back‑box protects the rear of the loudspeaker from water, dust, and falling objects making the unit vermin proof and prevents sound traveling via the ceiling cavity to adjacent areas. The back‑box is assembled with the loudspeaker by means of a snap‑in construction and has on top two knock‑out holes for two rubber cable grommets (11 mm/0.43”), standard supplied.
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|Diameter||75 mm (2.95 in)|
|Maximum depth||83.5 mm (3.29 in)|
|Material||ABS (V 0)|
|Weight||41 g (0.09 lb)|
|Color||White (RAL 9003)|
|Operating temperature||-25 ºC to +55 ºC(-13 ºF to +131 ºF)|
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