Sonance AF12 Installation Instructions

Introduction
The AF12 is a 200 watts (RMS) impedance-matching
system that allows the connection of up to 12 pairs of 8-ohm
speakers to a single
maintainging a safe
8 ohms at the amplifier). Screw-less quick connectors allow
for speedy installation of this device.
I I M M P P O O R R T T A A N N T T : : T T u u r r n n y y o o u u r r a a m m p p l l i i f f i i e e r r / / r r e e c c e e i i v v e e r r O O F F F F
b b e e f f o o r r e e p p e e r r f f o o r r m m i i n n g g t t h h e e f f o o l l l l o o w w i i n n g g c c o o n n n n e e c c t t i i o o n n p p r r o o c c e e - -
d d u u r r e e s s
Amplifier Recommendations
It is possible to use the Sonance AF12 with an amplifier
or receiver from any manufacturer provided the amplifier
delivers sufficient power to drive the speakers. Because of the
differences in amplifiers and receivers from any manufactur-
ers, Sonance recommends using an amplifier with a minimum
power rating of 50 watts per channel.
AF12 Placement
A major benefit of the AF12 is the versatility in placement
options. Because there is no house current (AC) required for
operation, it may be placed anywhere that is convenient.
Make sure to place the unit somewhere that is accessible for
servicing or wiring changes.
With no AC required, the AF12 can be installed anywhere
that is convenient for connection of all speakers, for example,
in a wall, attic, basement, utility room, soffits, and crawl
spaces.
Wiring
Always use high-grade
recommmend using at least 18 gauge wire for runs of 50 feet
or less, 16 gauge wire for runs of 50 – 100 feet, and 14
gauge wire for runs over 100 feet.
Source Connections
Connect the left and right speaker output of the receiver or
amplifier to the left and right inputs of the AF12. Make sure
to match positive (+) and negative (–) polarities. Simply strip
off ½" of the wire jacket and push it into the screw-less quick
connector. To remove a wire, simply push the black tab and
pull the wire out.
Speaker Connections
Connect your first set of speakers to the terminals marked
O 1. Continue this process in succession for up to
UTPUT
12 pairs of speakers. Make sure to match positive (+) and
negative (–) polarities.
amplifier or receiver,
operating impedance
Sonance speaker wire.
I N S TA L L AT I O N I N S T R U C T I O N S
A F 1 2
M A T C H I N G
Setting the Output Taps
The impedance of the speaker system is set manually by the
installer. A set of output taps is located on the AF12 circuit
while board. The installer sets the proper position of the taps
(nominal according to the total speaker impedance. Each impedance
setting is shown (see Figure 1 ) with both an impedance value
and speaker quantity for reference. Simply place the push
connection into the desired location.
8-
Using Other Than 8-ohm Speakers
If speakers other than nominal 8-ohm speakers are used in
the system, it is necessary to calculate the total impedance of
the speakers used.
When using an 8-ohm pair of speakers use the value . . 1 1 2 2 5 5
When using a 6-ohm pair of speakers use the value . . 1 1 6 6 7 7
When using a 4-ohm pair of speakers use the value . . 2 2 5 5
1. Add-up the valuse of the speakers in the system.
For example, if the system had four pairs of 8-ohm
We
speakers, one pair of 6 ohm speakers and one pair of
4-ohm speakers the formula would be:
( ( 4 4 x x . . 1 1 2 2 5 5 ) ) + + ( ( 1 1 x x . . 1 1 6 6 7 7 ) ) + + ( ( 1 1 x x . . 2 2 5 5 ) ) = = . . 9 9 1 1 7 7
2. Divide 1 by the result. The answer is the total resistance of
the speaker system. I I n n t t h h e e e e x x a a m m p p l l e e , , 1 1 / / . . 9 9 1 1 7 7 = = 1 1 . . 0 0 9 9 . .
For answers between:
8 8 . . 0 0 a a n n d d 4 4 . . 0 0 , the proper output tap position is the 4 4 - - o o h h m m position.
4 4 . . 0 0 a a n n d d 2 2 . . 0 0 , the proper output tap position is the 2 2 - - o o h h m m position.
2 2 . . 0 0 a a n n d d 1 1 . . 0 0 , the proper output tap position is the 1 1 - - o o h h m m position.
I M P E D A N C E
P
AIRS OF
S P
OHM PEAKERS
2 – 3
4 – 7
8 – 12
Figure 1 - Impedance Chart
S Y S T E M
T
AP
OSITION
4
OHMS
2
OHMS
1
OHM