2
CONNECTING THE AL2
(see
Illustration 4)
IMPORTANT: Make sure all source components and power amplifiers are
turned OFF before making any connections.
Do not plug the AL2 power supply into a wall outlet until all connections
have been made.
1. Determine which component will be the main (default) source and which
is the remote (sensing/switching) source. In most cases the Main source will
be the one with program that is continuous or active most of the time, such
as a satellite radio or cable TV tuner, or a CD changer in the
Continuous
Repeat
or
Random Play
mode. The Remote source will be something with
program material the user will be watching or listening to for a relatively
short time, such as a an iPort/iPod, CD player, or VCR.
2. Connect the left & right line outputs of the main source to the AL2’s
Input A
jacks; connect the left & right line outputs of the remote source to the AL2’s
Input B
jacks.
3. Connect the AL2’s left & right
Outputs
to the inputs of the system’s
amplifier, preamp/controller or receiver.
4. Connect the included PS-1 power supply to the AL2’s
12V DC
jack and plug
it into a
non-switched
AC outlet that supplies continuous current.
• If you’re using more than one Sonance
Industry Upgrade
component you
can power it from the AL2’s power supply by connecting a cable with
standard 2.1mm internal diameter connectors between the AL2’s
Loop
jack and the other component’s
12V DC
jack.
5. The amount of time it takes for the AL2 to revert back to
Input A
after the
signal to
Input B
has stopped is user-adjustable by the
B To A Delay Adjust
control. Turning the control clockwise increases the delay time.
• The minimum delay time is 3 seconds; the maximum is 3 minutes.
6. The amount of
Input B
voltage required to switch the AL2 from
Input A
to
Input B
is user-adjustable by the
Trigger Sensitivity
control. Turning the
control clockwise increases the trigger sensitivity (requires less voltage to
trigger the inputs to change).
• The minimum voltage required for triggering is 5mV; the maximum is 4.5V.
I N S T R U C T I O N M A N U A L
A L 2 a n d A L 2 / S I N D U S T R Y U P G R A D E
AUTOMATIC SECONDARY SOURCE SELECTOR
R
LR
L
R
L
CONTROL OUTPUT
12VDC 100mA
INPUT A
INPUT B
OUTPUT
AUTO SWITCH, LINE LEVEL
IN
OUT
12VDC
150mA
TRIGGER
SENSITIVITY
B TO A
DELAY
AL2
+ –
Output
Input A
Active
Indicator
Power
Supply
Connections
Input B
Active
Indicator
Trigger
Sensitivity
Adjustment
Switching
Delay Time
Adjustment
Remote
Input
Main
Input
Control
Output
Illustration 4: AL2 Connections and Controls
In a Home Theater System
(see
Illustration 3)
The AL2 and AL2/S can be used to automatically select between a VCR and a cable TV tuner in a home theater system. The AL2 would switch the stereo audio
signal feeding the surround sound receiver/processor, while the AL2/S would switch the composite video signal feeding the TV.
With the cable TV tuner connected to Input A and the VCR connected to Input B of the AL2 and AL2/S, the cable tuner would be the system’s main source and
would remain automatically selected by the AL2 whenever the VCR was not playing. When the VCR sends an audio signal to the AL2 and a video signal to the
AL2/S, it would automatically be selected and its signal sent to the surround receiver/processor and TV.
R
LR
L
R
L
CONTROL OUTPUT
12VDC 100mA
INPUT A
INPUT B
OUTPUT
AUTO SWITCH, LINE LEVEL
IN
OUT
12VDC
150mA
TRIGGER
SENSITIVITY
B TO A
DELAY
AL2
+ –
R
LR
L
R
L
CONTROL INPUT
12VDC 100mA
INPUT A
INPUT B
OUTPUT
SLAVE, LINE LEVEL
AL2/S
+ –
VCR
From
L/R Audio
Outputs
From
Composite
Video Output
From
Composite
Video Output
To Composite
Video Input
Left Speaker
Left Surround
Speaker
Powered Subwoofer
Right Surround
Speaker
Center Speaker
Right Speaker
From
L/R Audio
Outputs
Cable TV Tuner
TV/Monitor
Surround Sound
Receiver/Processor
AL2
Selector
AL2/S
Selector
To Audio
Source Inputs
From Control Output
To Control Input
Illustration 3: Home Theater System
