INTRODUCTION
Thank you for purchasing the AL2 — AL2/S Automatic Source Selector. The
AL2 and AL2/S automatically switch between two line-level stereo sources: a
main source connected to the Input A jacks and a remote source connected to
the Input B jacks.
When the AL2 senses a remote source signal present at the Input B jacks, that
source signal is automatically switched-through to the output jacks.When the
remote source signal is no longer present on Input B, after a short (installeradjustable) time delay the AL2 and AL2/S automatically switch the
outputs to the main source connected to the Input A jacks.
The time it takes the AL2 and AL2/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.
AL2 and AL2/S NEW FEATURES
The AL2 and AL2/S incorporate several new features that improve their
performance and installability:
• The AL2 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 AL2 power inputs have
reverse polarity protection.
• The AL2 features
DC In
and
DC Out
connections that allow multiple
Industry Upgrade
units to share a single power supply.
• The AL2
Control Out
and AL2/S
Control In
connectors are removable quick-toggle
RIA connectors.
• The AL2 and AL2/S chassis have recessed mounting holes that allow them to
easily be wall-mounted using two screws.
• The AL2 and AL2/S chassis’ are compatible with 3” TK-series SnapTrack
®
from Augat.
INSTRUCTION MANUAL
AL2 and AL2/S INDUSTRY UPGRADE
AUTOMATIC SECONDARY SOURCE SELECTOR
MENU
Volume
Control
Volume
Control
Volume
Control
RLRL
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
+ –
CAT-5
Cable
iPort
Wallplate
iPort
with
iPod
Zone 3
Speakers
Zone 2
Speakers
Zone 1
Speakers
CD Changer
275 SE
Amplifier
AL2
Selector
APPLICATIONS
Here are three examples of how the AL2 and AL2/S can be used in different
system configurations:
Basic Music System (see
Illustration 1
)
A basic music system consisting of two music sources (such as an iPort™
docking station and a CD changer), an AL2, a Sonance Sonamp® 275 SE
amplifier and speakers with in-wall volume controls would offer automatic
selection of the source and automatic turn-on of the Sonamp (using its Auto-
On feature).
With the CD changer connected to the AL2’s Input A and the iPort connected
to it’s Input B, the CD changer would be the system’s main source and would
remain automatically selected by the AL2 whenever the iPod® was paused, or
was not docked in the iPort.When the iPort/iPod sends an audio signal to the
AL2 it would automatically be selected and its signal sent to the amplifier.
A system like this does not require a preamp or other source selecting device.
When the iPod is paused or not docked and the CD changer is not playing, the
Sonamp will revert to its Standby mode and no sound will be heard.When the
system is playing, volume is controlled by the in-wall volume controls.
Combining Two Separate Systems (see
Illustration 2
)
Two separate systems in a home (such as the preamp/controller for a wholehome audio system and a master bedroom system with a small receiver) could
be connected to the AL2’s A and B inputs.
Connecting the AL2’s outputs to the Bus inputs of a multi-zone amplifier like
the Sonamp 875 SE creates an elegant selector for the two systems.
With the whole-home system preamp connected to the AL2’s Input A and the
bedroom system’s Tape Monitor output connected to the AL2’s Input B, the
bedroom system is now the remote source. Whenever it presents a signal to
the AL2 the whole-home system preamp is overridden and the bedroom
system will be heard throughout the house. As with the first example, the
whole-home system’s in-wall volume controls would control the volume in
each individual zone.
Illustration 1: Basic Music System
Volume
Control
Volume
Control
Volume
Control
RLRL
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
+ –
SONAMP 875D SE
PROTECTION
AUTO-ON
BBE ON
ACTIVE
LR
1–2 3–4 5–6 7–8
LRLRLR
Bedroom
System
Receiver
Zone 3
Speakers
Zone 2
Speakers
Zone 1
Speakers
Bedroom
Speakers
From
Tape Record
Outputs
From
Main
Outputs
Main System Preamp
875D SE
Amplifier
AL2
Selector
To BUS Inputs
1
Illustration 2: Combining Two Separate Systems
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.
INSTRUCTION MANUAL
AL2 and AL2/S INDUSTRY UPGRADE
AUTOMATIC SECONDARY SOURCE SELECTOR
RLRL
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.
RLRL
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
+ –
RLRL
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
Using the AL2
Control Output
with Multiple Slave Units
The AL2’s Control Output can supply up to 200mA of current. This allows it
to be daisy-chained with up to five (5) AL2/S slave units.
CONNECTING THE AL2/S (see
Illustration 5
)
The AL2/S is a ‘slave’ unit that operates similar to the AL2,except that its input
switching is controlled by an external control voltage source. In most systems
the control voltage will be supplied by the Control Output connector of an
AL2 unit, but any 12V source (with a minimum of 40mA of current) that
switches on and off can be used as a control trigger.
1. Connect the left & right line outputs of the main (default) 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 (see Step 1 of Connecting The AL2).
2. Connect the AL2/S’ left & right Outputs to the inputs of the system’s
amplifier, preamp/controller or receiver.
• If you’re using the AL2/S to switch a composite video signal connect its
Output jack to the TV or other video equipment.
3. Connect the switching 12V source to the AL2/S’ Control Input connector.
• You can use any 2-conductor wire (16ga ~ 22ga) to connect the AL2/S
Control Input terminals to the Control Output terminals of an AL2.
Caution: Do not short the ‘+’ and ‘–’ terminals together on the AL2 or
AL2/S
Control Outputs/Inputs
.
SPECIFICATIONS
Power Consumption (AL2): 90mA ±5% @ 12VDC
Power Consumption (AL2/S): 40mA ±5% @ 12VDC
Dimensions (W x H x D): 4” x 2” x 3” (102mmx 51mm x 76mm)
OTHER SONANCE INDUSTRY UPGRADE COMPONENTS
AVL1 Automatic Audio/Video Source Selector
The AVL1 provides automatic stereo line-level audio and composite video
switching between two audio/video sources (such as a VCR, cable TV tuner or
DVD player). Features and operation are otherwise identical to the AS2.
AS2 and AS2/S Automatic Secondary Source Selector (Speaker-Level)
The AS2 and AS2/S function identically to the AL2 and AL2/S except that they
switch speaker-level audio signals instead of line-level audio signals. Typical
applications would be switching a whole-home audio system and a local
television to a single pair of speakers, or as a ‘break-in’ device for paging
applications. Features and operation are identical to the AL2 and AL2/S,
except the AS2 and AS2/S operate at speaker level.
LS2 and LR2 Balanced Audio Sender and Receiver
The LS2 and LR2 the most efficient and highest-quality way to distribute
audio throughout a residential or commercial system. The LS2 converts
typical line-level audio signals to balanced configuration, allowing them to be
sent long distances and in close proximity to sources of noise interference
without inducing noise or high-frequency roll-off.
As a general rule of thumb, a balanced signal should be used for all but short
lengths of audio cable (under 20 feet) and wherever the possibility of signal
interference is likely. This includes where the audio signal passes near dimmers, transformers, fluorescent and neon lights, or along the same pathways
as house current.
Active circuitry in the LS2 sends the balanced signal to the LR2, which
converts it back to an unbalanced line level signal that can be connected to the
audio component. The LS2 and LR2 must always be used with each other
unless the audio equipment has balanced inputs or outputs (such as professional sound or recording equipment). In this situation the LS2 could be used
as an unbalanced-to-balanced converter and the LR2 could be used as a balanced-to-unbalanced converter. The LS2 can also be used with the 275 SE and
ASAP2 SAT amplifiers with an LR1 SAT module (part# 91815) installed.
VT1 Video Trigger
The VT1 provides a 12V DC signal when a video sync pulse is detected
(picture or blue screen). This can be useful in triggering any component
requiring a 12V signal. An LED indicates when the unit is active. A detachable
12V DC power supply is included.
RFGI1 Radio-Frequency Ground Loop Isolator
A passive device, the RFGI 1 is used to break a ground loop that can occur
when using a cable TV or antenna feed along with AC system grounding. The
RFGI1 blocks low frequency and DC by capacitor-coupling the shield and the
center conductor of any RF cable connected through it. This prevents the
occurrence of low-frequency humming and TV screen hum bars. The RFGI1
connects between the main cable TV feed and the cable distribution box, RF
amplifier,cable converter, VCR or TV. F-connections are used on each side for
a secure and reliable termination. Because it does not allow any RF leakage,
the RFGI1 is a superior termination compared to a 75-to-300-to-75 ohm
balanced connection.
OP3 Output Pad
Attenuates a stereo speaker-level signal to a stereo line-level signal. Can be
used to create an additional preamp signal from any amplifier or receiver
speaker terminals. Can also be used to add line-level output capability to a TV
with only external speaker leads. Use in conjunction with a 2-female to 1-male
Y-cord to sum left and right channels for monaural applications.
INSTRUCTION MANUAL
AL2 and AL2/S INDUSTRY UPGRADE
AUTOMATIC SECONDARY SOURCE SELECTOR
3
RLRL
R
L
CONTROL INPUT
12VDC 100mA
INPUT A INPUT B
OUTPUT
SLAVE, LINE LEVEL
AL2/S
+ –
Output
Remote
Input
Main
Input
Control
Input
Illustration 5: AL2/S Connections and Controls
Sonance • 212 Avenida Fabricante • San Clemente, CA 92672-7531, USA
(800) 582-7777 or (949) 492-7777 • FAX: (949) 361-5151
Technical Support: (800) 582-0772
©2007 Dana Innovations, Inc.All rights reserved.
Sonance and Sonamp are trademarks of Dana Innovations,.
iPod is a registered trademark of Apple Computer, Inc. SnapTrack is a registered
trademark of Augat.
www.sonance.com
33-0263 06/07
TECHNICAL ASSISTANCE AND SERVICE
If you any have questions about the operation or installation of this product, please call our Technical Assistance Department on any business day
at (800) 582-0772 or (949) 492-7777; from 7 a.m. to 5 p.m., Pacific Time.
If your product should need repair or service, contact your Sonance
Authorized Dealer for help, or use the following procedure:
1. Prior to calling Sonance, note the product’s model number, serial number, purchase date, and the name and address of the dealer where you
purchased the product.
2. Contact our Technical Assistance Department at the above
number(s) and describe the problem the unit is experiencing. If they
determine that the product requires service, they will transfer you to our
Customer Service Department, who will issue you a Return
Authorization (RA) Number.
IMPORTANT: YOU MUST HAVE PRIOR AUTHORIZATION TO
RETURN YOUR PRODUCT TO SONANCE!
3. If you’re directed to return the unit to Sonance for repair, pack the unit in
its original shipping carton. If needed, you can obtain replacement packaging from us for a small charge. Note: it is best if you place the box into
an additional outer “overcarton”before shipment to minimize a chance of
theft in shipment. Please include a copy of the original bill of sale inside
the package.
4. Contact a package delivery service such as United Parcel Service or
Federal Express to arrange prepaid (not collect) shipping. Do not use the
U.S. Postal Service.
IMPORTANT: FREIGHT COLLECT SHIPMENTS WILL BE REFUSED.
5. Write the RA Number on the outside of the shipping carton.
6. Ship the packaged unit to:
Quality Assurance Department
Sonance
212 Avenida Fabricante
San Clemente, CA 92672-7531
LIMITED WARRANTY COVERAGE (U.S. ONLY)
Sonance warrants to the original retail purchaser only that this Sonance
product will be free from defects in materials and workmanship for a
period of five (5) years, provided the product was purchased from a
Sonance Authorized Dealer.
Defective products must be shipped, together with proof of purchase, prepaid insured to the Authorized Sonance Dealer from whom they were purchased, or to the Sonance factory at the address listed on this instruction
manual. Freight collect shipments will be refused.It is preferable to ship this
product in the original shipping container to lessen the chance of transit
damage. In any case, the risk or loss or damage in transit is to be borne by
the purchaser. If, upon examination at the factory or Authorized Sonance
Dealer, it is determined that the unit was defective in materials or
workmanship at any time during this warranty period, Sonance or the
Authorized Sonance Dealer will, at its option, repair or replace this product
at no additional charge, except as set forth below.
If this model is no longer available and can not be repaired effectively,
Sonance, at is sole option, may replace the unit with a current model of
equal or greater value. In some cases where a new model is substituted, a
modification to the mounting surface may be required. If mounting surface
modification is required, Sonance assumes no responsibility or liability for
such modification. All replaced parts and product become the property of
Sonance. Products replaced or repaired under this warranty will be returned
to the original retail purchaser, within a reasonable time, freight prepaid.
This Warranty does not include service or parts to repair damage caused by
accident, disaster, misuse, abuse, negligence, inadequate packing or shipping procedures, commercial use, voltage inputs in excess of the rated maximum of the unit, or service, repair or modification of the product which
has not been authorized or approved by Sonance. This Warranty also
excludes normal cosmetic deterioration caused by environmental conditions. This Warranty is in lieu of all other expressed warranties. If the product is defective in materials or workmanship as warranted above, the purchaser’s sole remedy shall be repair or replacement as provided above. In no
event will Sonance be liable for any incidental or consequential damages
arising out of the use or inability to use the product, even if Sonance or a
Authorized Sonance Dealer has been advised of the possibility of such damages, or for any claim by any other party.
Some states do not allow the exclusion or limitation of consequential
damages, so the above limitation and exclusion may not apply. All implied
warranties on the product are limited to the duration of this expressed
Warranty. Some states do not allow limitation on the length of an implied
warranty. If the original retail purchaser resides in such a state, this limitation
does not apply.
EXCLUSIONS AND LIMITATIONS
The warranty set forth above is in lieu of all other warranties, express or
implied, of merchantability, fitness for a particular purpose, or otherwise.
The warranty is limited to Sonance products registered herein and
specifically excludes any damage to loudspeakers and other allied or
associated equipment which may result for any reason from use with this
product. Sonance shall, in no event, be liable for incidental or consequential
damages arising from any breach of this warranty or otherwise. This warranty gives you specific legal rights, and you may have other rights which
vary from state to state.
INSTRUCTION MANUAL
AL2 and AL2/S INDUSTRY UPGRADE
AUTOMATIC SECONDARY SOURCE SELECTOR
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