INTRODUCTION
Thank you for purchasing the AS2 — AS2/S Automatic Speaker Source Selector. The AS2 and AS2/S automatically switch a single pair of speakers between two speaker-level stereo sources: a main source connected to the Input A terminals and a remote source connected to the Input B terminals.
When the AS2 senses a remote source signal present at the Input B terminals, that source signal is automatically switched-through to the output terminals. When the remote source signal is no longer present on Input B, after a short (installer-adjustable) time delay the AS2 and AS2/S automatically switch the outputs to the main source connected to the Input A terminals.
The time it takes the AS2 and AS2/S to switch back to Input A from Input B can be adjusted to suit the different types of audio sources being used, or the preferences of the listeners. The sensitivity of the detection/switching circuitry is also adjustable to work with a variety of audio source equipment.
I N S T R U C T I O N M A N U A L
A S 2 a n d A S 2 / S I N D U S T R Y U P G R A D E AUTOMATIC SECONDARY SPEAKERSOURCE SELECTOR
AS2 and AS2/S NEW FEATURES
The AS2 and AS2/S incorporate several new features that improve their performance and installability:
•The AS2 operates on a single-output 12V DC power supply, and can also be powered directly by 12V sources in cars, boats or RV installations. The AS2 power inputs have reverse polarity protection.
•The AS2 features DC In and DC Out connections that allow multiple Industry Upgrade units to share a single power supply.
•The AS2 and AS2/S Input, Output and Control connectors are removable quicktoggle RIA connectors.
•The AS2 and AS2/S chassis have recessed mounting holes that allow them to easily be wall-mounted using two screws.
•The AS2 and AS2/S chassis’ are compatible with 3” TK-series SnapTrack® from Augat.
APPLICATIONS
Here are three examples of how the AS2 and AS2/S can be used in different system configurations:
Switching Between Speaker-Level Sources (see Illustration 1)
The AS2 can automatically switch two speaker-level sources, such as a wholehome audio system and a local TV set, to a single pair of speakers.
With the whole-home system amplifier connected to the AS2’s Input A and the local zone TV’s speaker outputs connected to the AS2’s Input B, the wholehome system would be the speakers’ main source and would remain automatically selected by the AS2 whenever the TV was turned OFF. When the TV is ON it sends an audio signal to the AS2, which would then automatically select the TV as the active source and send its signal to the speakers.
Illustration 1: Switching Between Speaker-Level Sources
Family Room
Volume
Whole-Home System Control
Preamp/Controller
Dining Room
Volume
Control
Whole-Home System
Amplifier
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Bedroom |
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TV or Monitor |
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From |
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Speaker |
+L– –R+ |
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+L– –R+ |
Outputs |
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+ – |
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INPUT A |
CONTROL OUTPUT |
INPUT B |
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12VDC 100mA |
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AUTO SWITCH, AS2 |
Volume |
SPEAKER LEVEL |
Control |
IN |
+L– –R+ |
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12VDC |
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150mA |
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OUT |
TRIGGER |
B TO A |
SENSITIVITY DELAY |
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AS2 |
OUTPUT |
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Selector |
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As a Paging System “Break-In” Device (see Illustration 2)
The AS2 can serve as a “Break-In” device for paging applications. The continuous music source would be connected to the AS2’s Input A, the paging system amplifier would connect to the AS2’S Input B, and the AS2’s Outputs would connect to the local speakers. When the paging amplifier is activated the AS2 would switch to Input B to reproduce the page; after the page had ended it would revert back to the music signal connected to Input A.
Illustration 2: As a Paging System “Break-In” Device
iPort w/iPod
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Paging |
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CD Changer |
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Microphone |
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Music System |
Paging System |
Receiver/Amplifier |
Amplifier |
From |
From |
Speaker |
Speaker |
Outputs |
Outputs |
+L– –R+ |
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+L– –R+ |
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+ – |
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INPUT A |
CONTROL OUTPUT |
INPUT B |
12VDC 100mA |
AUTO SWITCH, AS2
SPEAKER LEVEL
IN |
+L– –R+ |
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12VDC |
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150mA |
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OUT |
TRIGGER |
B TO A |
SENSITIVITY DELAY |
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AS2 |
OUTPUT |
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Selector |
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I N S T R U C T I O N M A N U A L
A S 2 a n d A S 2 / S I N D U S T R Y U P G R A D E
AUTOMATIC SECONDARY SPEAKER SOURCE SELECTOR
In a Home Theater (see Illustration 3)
The AS2 and AS2/S can be used to switch speakers in a home theater system between background music reproduction and dedicated home theater duties. In the example below, an AS2 is used to switch the front left & right speakers from background music to home theater application, while an AS2/S slave unit switches the surround speakers from background music to home theater surround channel application. The background music amplifier is the main input (Input A), while the surround sound receiver is the remote input (Input B) — when it outputs a signal the AS2 and AS2/S send its signal to the speakers.
Illustration 3: Switching Speakers in a Home Theater System
Background Music |
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Surround Sound |
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Left |
Right |
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Amplifier |
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Receiver |
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Speaker |
Speaker |
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TV/Monitor |
Center |
Speaker A |
Speaker B |
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Front |
Surround |
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Center |
Speaker |
Outputs |
Outputs |
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Speaker |
Speaker |
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Speaker |
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Outputs |
Outputs |
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Output |
Powered |
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Subwoofer |
+L– –R+ |
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+L– –R+ |
+L– –R+ |
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+L– –R+ |
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+ – |
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+ – |
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INPUT A |
CONTROL OUTPUT |
INPUT B |
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INPUT A |
CONTROL INPUT |
INPUT B |
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12VDC 100mA |
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12VDC 100mA |
Left |
Right |
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AS2 |
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AS2/S |
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AUTO SWITCH, |
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Surround |
Surround |
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SPEAKER LEVEL |
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SLAVE, |
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SPEAKER LEVEL |
Speaker |
Speaker |
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IN |
+L– –R+ |
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+L– –R+ |
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12VDC |
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150mA |
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OUT |
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TRIGGER |
B TO A |
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SENSITIVITY |
DELAY |
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AS2 |
OUTPUT |
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OUTPUT |
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AS2/S |
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Selector |
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From Control Output |
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Selector |
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To Control Input |
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CONNECTING THE AS2 (see Illustration 4)
IMPORTANT: Make sure all source components and power amplifiers are turned OFF before making any connections.
Do not plug the AS2 power supply into a wall outlet until all connections have been made.
Illustration 4: AS2 Connections and Controls
Main |
Control |
Remote |
Input |
Output |
Input |
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+L |
–R+ |
Input A |
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Active |
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Indicator |
INPUT A |
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IN |
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12VDC |
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150mA |
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OUT |
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+L– |
R+ |
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Input B |
+ |
– |
INPUT B |
Active |
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12VDC 100mA |
Indicator |
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CONTROL OUTPUT |
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AUTO SWITCH, |
AS2 |
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SPEAKER LEVEL |
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Switching |
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Delay Time |
+L– –R+ |
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Adjustment |
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B TO A |
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SENSITIVITY |
DELAY |
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OUTPUT |
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Power |
Output |
Trigger |
Supply |
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Sensitivity |
Connections |
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Adjustment |
1.Determine which amplifier will be the main (default) amplifier and which is the remote (sensing/switching) amplifier. In most cases the Main amplifier will have program that is continuous or active most of the time, such as a whole-home audio system amplifier. The Remote amplifier will have program material the user will be watching or listening to for a relatively short time, such as a paging system amplifier or a local TV set’s speaker outputs.
2.Connect the left & right speaker outputs of the main amplifier to the AS2’s Input A terminals; connect the left & right speaker outputs of the remote amplifier to the AS2’s Input B terminals.
Note: The AS2 can be used with amplifiers up to 100 watts RMS/channel.
3.Connect the AS2’s left & right Outputs to the local zone speakers.
4.Connect the included PS-1 power supply to the AS2’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 AS2’s power supply by connecting a cable with standard 2.1mm internal diameter connectors between the AS2’s Loop jack and the other component’s 12V DC jack.
5.The amount of time it takes for the AS2 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 AS2 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.
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