Page 1
TM
TECHNOLOGY
BALANCED AUDIO CONTROLLER INSTALLATION MANUAL
SPECIFICATIONS
Front Panel ON/OFF Switch with LED power indicator.
Two mono inputs (A&B) and eight mono outputs (1-8), may be configured as one stereo in, four stereo out.
1/4" stereo phone jacks in and out; these accommodate balanced and unbalanced signals.
Channel A or Channel B may be directed to each output via the front panel switches.
Eight independent outputs with individual gain controls.
16 VAC UL rated Power Supply included.
One rack height- 17"W x 1.75"H x 4.5"D.
USES
distributor to eight different locations in mono. Some common examples of this would be to;
1. Split and buffer the output of a CD player to four different Receiver/Amplifiers.
2. Distribute line level signals long distances throughout a house or building. Doing this in balanced mode is the preferred method
3. Send a source balanced or unbalanced out to four locations with a mixture of input types; i.e. two amplifiers with XLR
nature, a stereo signal may be accommodated using both inputs. Each input may be configured as balanced or unbalanced at the flick of a
switch (rear panel). Therefore both inputs may be balanced, unbalanced, or split with one balanced and the other unbalanced.
front panel. Each output may also be configured as balanced or unbalanced at the flick of a switch (rear panel).
of equipment are in different parts of a building or a house. The ground loop usually manifests itself as audio noise/hum or video picture
interference. The best way to locate the problem is to disconnect items one at a time until the problem goes away. In some instances the
difference in ground potentials is enough to lead to a shock. Care should be taken when dealing with one. To minimize the possibility of a
ground loop wire shields should be left disconnected at one end, however a ground wire must be connected between the equipment by a
single wire, the bigger the better. Leave all the shields disconnected at the BAC or at the sources and destinations. This pertains only to
signal cables. DO NOT LIFT THE BUILDING GROUND ON ANY PIECE OF EQUIPMENT SUPPLIED WITH ONE! DO NOT CUT
THE GROUND SPADE OFF OF THE ELECTRICAL CORD!...........You risk your own life and the lives of others.
The BAC is used as a stereo line level source distributor to four different locations in stereo or as a mono line level source
for noise rejection.
balanced inputs and two amplifiers with RCA unbalanced inputs.
Please see diagrams on following pages for reference
The BAC is a line level audio distribution controller. The input consists of A and B channels. Though each channel is mono in
There are eight output channels. For each of these outputs there is a gain control knob and input channel selector (A or B) on the
When connecting different pieces of equipment, ground loops are always a possibility. This is particularly true when these pieces
one end of the wire as stated above. In some cases, Baluns (balanced to unbalanced transformers) are required. Certain types of
connectors/adaptors may also be needed. Audioplex Technology(tm) sells many of these items should you need them.
On the following pages wiring diagrams for different types of connectors are provided. Notice the shields are left disconnected at
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BAC used to split and buffer the output of a CD player
to four different Receiver/Amplifiers.
BAC
8
7
6
5
4
3
CD PLAYER
L R
UNBALANCED
2
UNBALANCEDUNBALANCEDUNBALANCEDUNBALANCED
1
B A
16 VAC POWER SUPPLY
L R
AMPLIFIER 4
L R
AMPLIFIER 3
L R
AMPLIFIER 2
L R
AMPLIFIER 1
BAC used to send a source, balanced or unbalanced out to four
locations with a mixture of input types; i.e. two amplifiers with XLR
balanced inputs and two amplifiers with RCA unbalanced inputs.
BAC
8
7
6
5
4
3
2
MIXER
L R
BALANCED
1
B A
L R
AMPLIFIER 4
Consumer Receiver
w/ unbalanced input
RCA inputs
L R
AMPLIFIER 3
Consumer Receiver
w/ unbalanced input
RCA inputs
L R
AMPLIFIER 2
Professional Amp
w/ balanced input.
XLR or 1/4" stereo
BALANCEDBALANCEDUNBALANCEDUNBALANCED
16 VAC POWER SUPPLY
L R
AMPLIFIER 1
Professional Amp
w/ balanced input.
XLR or 1/4" stereo
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BAC used to distribute line level signals long distances
throughout a house or building. Doing this in balanced
mode is the preferred method for noise rejection.
BAC
CD PLAYER
L R
UNBALANCED
12345678
B A
BALANCEDBALANCEDBALANCED
L R L R L R L R
AMPLIFIER 4 AMPLIFIER 3 AMPLIFIER 2 AMPLIFIER 1
FAMILY ROOM
DEN
BALANCED
BALUNBALUNBALUNBALUN
BEDROOM 1BEDROOM 2
16 VAC POWER SUPPLY
Your AUDIOPLEX TECHNOLOGY(tm) BALANCED AUDIO CONTROLLER is covered by a 10 year warranty against
any defects in workmanship and materials. Any defects will be remedied without charge for labor or parts during this period
of time following the date of purchase.
Damage incurred by shipping or accident is not considered to be a defect, and not covered by this warranty.
AUDIOPLEX TECHNOLOGY(tm) is not responsible for defective operation caused by abuse or by modification or service by
any unauthorized person or agency.
The unit must be properly installed and operated according to instructions for the warranty to apply. Any necessary
servicing must be done by AUDIOPLEX TECHNOLOGY(tm). The product must be returned expenses prepaid, with written
authorization from the company. The product must be shipped with proof of purchase and in the original carton and packing
material to avoid damage.
This warranty gives you specific legal rights. You may have other rights which vary from state to state.
WARRANTY
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Suggested Wire Connections from BAC Output to Amp/Receiver/Processor
Switch Position UNBALANCED
BAC OUTPUT
1/4" Mono to RCA
RED
NO
CONNECT
BLACK
SHIELD
1/4" Stereo to RCA
RED
NO
CONNECT
BLACK
SHIELD
1/4" Stereo to 1/4" Mono
RED
NO
CONNECT
BLACK
SHIELD
1/4" Stereo to 1/4" Stereo
RED
NO
CONNECT
BLACK
SHIELD
1/4" Mono to 1/4" Mono
RED
NO
CONNECT
BLACK
SHIELD
1/4" Mono to 1/4" Stereo
RED
NO
CONNECT
BLACK
SHIELD
1/4" Mono to XLR
RED
NO
CONNECT
BLACK
SHIELD
1/4" Stereo to XLR
RED
NO
CONNECT
BLACK
SHIELD
AMP/REC
3
1
2
3
1
2
Switch Position BALANCED
1/4" Stereo to 1/4" Stereo
RED
NO
CONNECT
BLACK
SHIELD
1/4" Stereo to XLR
RED
BLACK
NO
CONNECT
SHIELD
3
1
2
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Suggested Wire Connections from SOURCE to BAC
Switch Position UNBALANCED
SOURCE
3
2
1
3
2
1
NO
CONNECT
NO
CONNECT
NO
CONNECT
NO
CONNECT
RCA to 1/4" Mono
RED
BLACK
SHIELD
RCA to 1/4" Stereo
RED
BLACK
SHIELD
1/4" Mono to 1/4" Stereo
RED
BLACK
NO
CONNECT
SHIELD
1/4" Stereo to 1/4" Stereo
RED
NO
CONNECT
BLACK
SHIELD
1/4" Mono to 1/4" Mono
RED
NO
CONNECT
BLACK
SHIELD
1/4" Mono to 1/4" Stereo
RED
NO
CONNECT
BLACK
SHIELD
XLR to 1/4" Mono
RED
BLACK
SHIELD
XLR to 1/4" Stereo
RED
BLACK
SHIELD
BAC IN A or B
3
2
1
NO
CONNECT
Switch Position BALANCED
1/4" Stereo to 1/4" Stereo
RED
NO
CONNECT
BLACK
SHIELD
XLR to 1/4" Stereo
RED
BLACK
SHIELD
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