Effect of PoE and PoE+ on Horn Speaker volume

Last modified: Friday January 09, 2026.

For optimal sound volume, power Alta Horn Speakers using PoE+. Powering a Horn Speaker using PoE results in a lower sound volume.

• The volume slider for a Horn Speaker is relative to the maximum volume for the supplied power type.

• Two speakers supplied with different power types will produce different sound levels, even if set to the same volume level in Alta Video or Alta Protect

• For specific details of the possible sound pressure levels based on power supply type, see the datasheet.