Russound AB-3 Instruction Manual

The Russound Model AB-3 Automatic Speaker selector is
designed to provide automatic switching of two amplified audio
sources to a single pair of speakers. The AB-3 provides automatic
switching from the main audio system (AMP A) to a remote audio
source (AMP B). For example, connect the speaker output of your
TV and your stereo receiver to the selector. AMP B has priority
when both audio signals are present. If you are listening to the
stereo (AMP A) and turn on the television (AMP B), the AMP B
audio will override the AMP A audio.

It is recommended that the AB-3 be located near the “priority”
source, minimizing the length of cable. This will help eliminate the
possibility of picking up extraneous noise.

The AB-3 includes a sensitivity trigger adjustment to allow
switching between the sources (signals) at a desired volume level. It
also includes a delay adjustment to prevent source switching during
the absence of a signal.

Turn to the next page for setup instructions.

AUDIO / VIDEO DISTRIBUTION SYSTEMS

LIMITED WARRANTY

The Russound Automatic AB-3 Selector is fully guaranteed for two (2) years from

the date of purchase against all defects in materials and workmanship. During this

period, Russound will replace any defective parts and correct any defect in

workmanship without charge for either parts or labor. For this warranty to apply,

the unit must be installed and used according to its written instructions. If service

is necessary, it must be performed by Russound. The unit must be returned to

Russound at the owner’s expense and with prior written permission. Accidental

damage and shipping damage are not considered defects under the terms of this

warranty. Russound assumes no responsibility for defect resulting from abuse or

servicing performed by an agency or person not specifically authorized in writing

by Russound. Damage to or destruction of components due to excessive power

voids the warranty. In these cases, the repair will be made at the owner’s expense.

Be sure to pack in a corrugated container with at least 3 inches of resilient

material to protect the unit from damage in transit.

AB-3

Automatic AB Selector

5 Forbes Road

Newmarket, NH 03857

☎

603.659.5170

fax [phone]

email: [e-mail]

AUDIO / VIDEO DISTRIBUTION SYSTEMS

Instruction Manual

DELAY SETUP

To establish the proper delay, it is recommended that the Delay
control is set at half way (12 o’clock). This is approximately a delay
of 10 to 15 seconds. With both AMP A and AMP B connected.
Turn on both sources. The audio from AMP B will be hjeard from
the speakers. Turn off AMP B and time the delay to when AMP A is
heard. To increase the time delay rotate the DELAY control
clockwise, to decrease the delay rotate the control counter
clockwise. Repeat these steps until the desired delay is achieved.

SENSITIVITY SETUP

Set the trigger control approximately half
way (12 o’clock). Play AMP B,
monitoring the volume level;
lower the volume level of AMP B
to the minimum level required to
maintain the signal on the AB-3.
Remember AMP B is the primary
source. The volume adjustment
will be made from AMP B. Allow
the audio to play for a minute to
determine if this level will keep
the AB-3 selected to your local source. If the volume level that you
have chosen is not enough to keep the AB-3 selected, increase the
sensitivity (TRIGGER) adjustments by rotating the control
clockwise. Make these adjustments with a slight rotation. Try to
avoid rotating the control too much. If the sensitivity adjustment is
set too sensitive the AB-3 could randomly switch. If this occurs

TV W/ SPEAKER OUTPUTS

If your TV has speaker outputs,
connect them to the AMP B input
on the AB-3.

TV W/ VARIABLE OUTPUTS

If your TV does not have external
speaker outputs, connect your TV’s
variable out to an amplifier then to

AMP B on the AB-3.

TV W/O VARIABLE OUTPUTS

If your TV only has RCA outputs,
connect your TV to a receiver /
integrated amplifier. Connect the
receiver/amplifier outputs to the
AMP B input on the AB-3

Minimum trigger level: 15 mV
Delay: 0 to 30 Seconds
Power Handling: 200 Watts RMS continuous per channel
Power: 12 VDC 200 mA. Included
Dimensions: 6.25” x 3.75” x 2.50”

158mm x 95mm x 64mm

Weight: 1.4lb (.65kg)