Features 

• Active electronics power the speaker
• Ported enclosure design allows lower frequency extension down to 125 Hz octave band for sound masking and 115 Hz for paging and music
• 17 dB louder than previous direct field emitter offerings
• Plenum-rated, UL-listed, and complies with UL 2043
• Delivers four uncorrelated audio channels to reduce phasing/comb-filtering
• Comes standard with a slip-ring mount for acoustical tile mounting
• Rear DIP switches reduce volume by 4.5 dB in 1.5 dB increments, if needed
• Compatible with the Qt 300 and Qt 600 control modules
• Control via web-based management from any device
• Compatible with DynasoundPro Network System (Specify DS1320)