
APF-15U, APF-15TU, APF15TUC  INSTALLATION INSTRUCTIONS
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GENERAL DESCRIPTION
• Atlas Sound Models APF-15U, APF-15TU and APF-15TUC are high efficiency, U.L. Listed double re-entrant type loud   
 speakers. They comply with the requirements of UL Standard 1480, Fire Protective Signalling Speakers.
• They are designed to be used in conjunction with compatible control equipment for high intelligibility reproduction of 
 audible emergency and protective signals as well as voice messages.
• Model APF-15TUC includes a supervisory capacitor and is suitable for installation in systems employing supervised 
 circuitry (25V/70.7V). Maximum supervised circuit voltage is 24 VDC.
• For use in ambient ranges from 
-40˚C to 66˚C.
            SPECIFICATIONS
POWER:        15 Watts RMS        FREQUENCY RESPONSE:  400-4,000Hz 
SOUND LEVEL:  103dB UL 10' Rating 
(APF-15U Only) 
CONDUIT CONNECTION:   For 1⁄2" Conduit
6.12"
(155.5mm)
Power Tap Selector Switch
 Switch  Impedance  25V  *db@  70V  *db@ 
 Position    Line  10 Ft.  Line  10 Ft.
   1  5.0 K  -    .9 W   90
   2  2.5 K  -        1.8 W   93 
   3  1.3 K  .48 W   87    3.8 W   95 
   4  666  .94 W   90    7.5 W     98 
   5  333  1.8 W   93   15.0 W   100 
   6  89  7.5 W   98      Do Not Use 
   7  45  15.0 W   100     On 70 V.
* UL 3dB Increment Rating
NOTE: Terminal #2 is the positive terminal
Mounting Dimensions
WIRING DIAGRAM
To conform with UL requirements, wires must be connected as shown in wiring diagram.
NOTE: The maximum wire size that can be connected to this device is 18 Gauge!
From 
Amplifier
Speaker 1         Speaker 2
To Next Speaker 
or End of Line 
Resistor
CAUTION: Do Not loop wires under screw terminals. Break wire run to provide supervision of connection. 
Installation must comply with all Building Codes and NFPA guidelines. Installation must adhere to N.E.C. 
and NFPA 70/72 wiring directives and comply with all National and Local Building Codes. 
Specifications are subject to change without notice
  www.AtlasSound.com
© 2005 ATLAS SOUND LP  Printed in U.S.A.   000105  ATS000702 RevE 01/05  PN 8840400 
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS U.S.A.  •  TELEPHONE: (800) 876-3332  •  FAX: (800) 765-3435