Product manual
Speakers
6
Programming
DIP Switch Programming
Switch Position Description
3 OFF Alert tone OFF (factory default)
3 ON Alert tone ON
4 OFF Talk battery OFF (factory default)
4 ON Talk battery ON
5 OFF
Audio load 10K (for applications using
background music)
5 ON Audio load 600 ohms (factory default)
Switch 1 Switch 2 Sound Output Description
OFF OFF Electronic Warble (Loudest Sound)
OFF ON Double Gong (Soft & Pleasant)
ON OFF Quadruple Chime (Soft & Pleasant)
ON ON Door Chime (Soft & Pleasant)
Note 1: Mount the amplifier close to where the speakers are
installed to minimize the speaker wire run lengths.
Note 2: Using half the recommended distance or half as many
speakers per run will keep the volume lost limited to 3db.
Note 3: Doubling up the wires will allow double the length, or
reduce the amount of volume loss.
Note 4: Heavier gauge wire, fewer speakers per run, and
shorter runs will all minimize volume loss.
The PA-2A contains an amplifier which can drive up to three 8-ohm speakers. The more speakers that are used,
the less shared power each speaker will receive, the softer they will each play. A single speaker with a short
speaker wire run will receive the full 2 watts of power, where if 3 speakers are used, there will be less then 1 watt
of power available for each speaker. See DOD# 895 for additional information on paging horn volume per number
of speakers being used. If additional paging power is needed, add a Viking model PA-60 for 60 more watts of
paging power.
Another consideration when budgeting speakers is paging power that is lost in the wire runs. A single speaker on
a short heavy gauge wire will have no loss, but many speakers on a long light gauge wire will have an unacceptable
amount of volume lost. Use the below chart as a guide line to keep the volume lost limited to less then 5db. Using
half the recommended distance or half as many speakers per run will keep the volume lost limited to less then
3db.
A. Speakers
B. Managing Power Losses
#16
#18
#20
#22
#24
123
2,000'
1,250'
800'
500'
315'
1,000'
625'
400'
250'
155'
665'
420'
265'
165'
105'
Wire Gauge Size
Number of 8 Ohm
Speakers on a Wire Run
Maximum recommended length (in feet) for the number of 8
Ohm speakers on a wire pair to maintain a volume loss of less
than 5dB.
ON
OFF
1 2 3 4 5
VIKING©
VIKING
ELECTRONICS
HUDSON,
WI
54016
PAGING - LOUD RINGING
AMPLIFIER SYSTEM
POWER 13.8V AC
MODEL PA-2A
PAGING
VOLUME
RINGING
VOLUME
MIN
MAX
MIN
MAX
12345678910
NIGHT
TRANSFER
PAGING
HORN
600 OHM
AUDIO OUT
TRUNK OR
PAGING PORT
LOUD RING
TRIGGER INPUT
1 - 3
4 - 6
RINGING LINES
WARBLE / CHIME
1 2 3 4 5
AUDIO LOADING
TALK BATTERY
ALERT TONE
Note: DIP Switches are shown in factory default positions.