90 DAA2 & DAX — P/N 53265:A1 8/24/2011
DAA Digital Audio Amplifiers Overview
Figure C.1 gives a simplified illustration of DAAs and their positions in the Digital Audio Loop
(DAL) of a DVC.
Figure C.1 DAL Block Diagram
C.1.2 Features
The DAA audio amplifiers have the following features:
• 50W total output power at 25V
RMS
(all DAA-5025 model versions) or 70 V
RMS
(all
DAA-5070 model versions).
• 75W total output power at 25V
RMS
(all DAA-7525 model versions).
• Two Class A (Style Z) connections for high-level audio output, or alternately, four Class B
(Style Y) connections, which dynamically share the 50W output capability.
• Audio output activation via network control-by-event equations resident within the DVC.
• Isolated alarm bus input, to be used for backup activation of alarm messages when normal
digital communication is lost.
• Amplifies one channel of digital audio and distributes it on up to four outputs (50W
maximum).
• Auxiliary input for 12V
P-P
analog low-level AMG-1 type audio sources.
• Auxiliary input for 1V
RMS
, to be used for background music input, an interface with a
telephone paging source, or other compatible audio sources. Includes user audio level
adjustment feature.
• Uploads and downloads via the DVC.
• Up to 106 seconds of Backup Digital message storage (Emergency tone, Non-Emergency tone,
and FFT busy tone) for use in the event of communication loss- either standard quality or high
quality, from the VeriFire Tools message library or created by the installer.
• Battery charger (50 watt DAAs only) and power supply capable of supporting up to 55AH
batteries.
• Relay contacts that will activate on a trouble condition.
• Backup amplifier function.
• Programmable through VeriFire Tools.
• Meets UL requirements for 800 Hz to 2.8 KHz bandwidth.
Meets ULC requirements for 400 Hz to 4 KHz bandwidth.
DVC
DAA
1
DAA
2
DAA
32
Optional Style 7 return
To panel or
network
connection
Digital Audio Loop (DAL)
NOTE:
Speaker placement must be given careful consideration when planning an audio system.
• Place speakers from different DALs (Digital Audio Loops) so they are not within the audible
areas of other DALs.
• Carefully consider the audible range of speakers within a DAL; overlapping audio messages can
be confusing.
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