Pioneer PDP-502MX Manual page 32

Special Installation (Embedding in the wall)
(2) Embedding in walls with no space provided behind the unit.
Panting (Punching) net (numerical aperture 50% or over)
100mm or
50mm or
more
Cation : Due to possible heat up, we do not recommend installation in narrow, enclosed areas.
Operating Temperature Restrictions
• Ambient temperature: 0 to 40 °C
• The same operating temperature restrictions apply to the speaker system (PDP-S03-LR).
Operating Temperature Restrictions for Upside-Down Installations
* Upside-down mounting is unavailable when embedding this device in a wall.
32
more
100mm or
more