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A 2380 REDBACK
™
Speaker Distribution System
The A 2380 speaker distribution system enables you to connect up to ten pairs of speakers to the one
stereo amplifier.
The output from the amplifier is wired directly to the A 2380. From there, wire is run to various speakers
which may be located in the family room, the living room, the dining room, the pool area, the kitchen,
and the master bedroom. Thus enabling you to listen to music from the one source throughout your
home.
FEATURES:
• Connect up to ten speaker pairs at once.
• Autoformer Impedance matching designed for high quality audio distribution. Low power loss.
Low heat generation.
• Heavy duty screw terminals can handle up to 8 gauge wire from the amplifier.
• Removable speaker terminals can handle up to 12 gauge wire.
• Separate left and right channel ground paths for compatibility with all amplifiers. (Even bridged)
• Power handling capability of 500 watts / channel (average music power)
• May be used with 6 or 8 Ohm speaker systems.
• Ideal for both home and commercial sound installations.
Installation considerations:
Type of speaker wire.
For most applications, we recommend you use 12 or 14 gauge, standard copper speaker wire for the
A 2380 connections. For wiring runs longer than 24 metres (80 feet), 8 gauge wire is recommended.
Avoiding Interference
Speaker wires can act as an "antenna" for electrical noise. Locating speaker wire too close to a light
dimmer or switch may cause a "buzzing" or "popping" sound to be heard throughout the speakers.
If at all possible, try to route the speaker wires several feet away from the electrical wiring.
Page 2
A 2380 REDBACK
Amplifier Impedance load
As most pairs of speakers are connected in parallel to a receiver or amplifier, the overall system imped-
ance becomes lower. For example, if two pairs of 8 Ohm speakers are connected in parallel, the imped-
ance will be 4 Ohms. Two pairs of 4 Ohm speakers in parallel become 2 Ohms, and so on.
Most receivers or amplifiers are not rated for use below a 4 Ohm load. Most manufacturers do not rec-
ommend connecting more than two pairs of speakers without using some form of impedance correction.
The A 2380 includes impedance correction circuitry, which protects your receiver or amplifier from low
impedance loads. The circuitry assures that your receiver or amplifier will see a safe operating load, even
when all speaker pairs are connected at the same time.
Impedance correction
This process insures that the impedance load shown to the receiver or amplifier never goes below the
rated capabilities of the receiver or loads that will be presented to your amplifier. See the chart below for
specific impedance loads that will be presented to your amplifier.
Number of speaker pairs connected.
1
2
3
4
6 Ω
X
X
X
6 Ω
6 Ω
X
X
6 Ω
6 Ω
6 Ω
6 Ω
X
Amplifier
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
Number of speaker pairs connected.
1
2
3
4
8 Ω
X
X
X
8 Ω
8 Ω
X
X
8 Ω
8 Ω
8 Ω
8 Ω
X
Amplifier
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
™
Speaker Distribution System
5
6
7
8
9
10
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
6 Ω
X
X
X
X
X
6 Ω
6 Ω
X
X
X
X
6 Ω
6 Ω
6 Ω
X
X
X
6 Ω
6 Ω
6 Ω
6 Ω
X
X
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
X
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
6 Ω
5
6
7
8
9
10
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
8 Ω
X
X
X
X
X
8 Ω
8 Ω
X
X
X
X
8 Ω
8 Ω
8 Ω
X
X
X
8 Ω
8 Ω
8 Ω
8 Ω
X
X
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
X
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
8 Ω
Impedence
tap (Ω)
1 (8.00 Ω)
2 (3.00 Ω)
3 (2.00 Ω)
4 (1.50 Ω)
5 (1.20 Ω)
6 (1.00 Ω)
7 (0.875 Ω)
8 (0.75 Ω)
9 (0.66 Ω)
10 (0.60 Ω)
Impedence
tap (Ω)
1 (8.00 Ω)
2 (3.00 Ω)
2 (3.00 Ω)
3 (2.00 Ω)
4 (1.50 Ω)
5 (1.20 Ω)
5 (1.20 Ω)
6 (1.00 Ω)
7 (0.875 Ω)
7 (0.875 Ω)
Page 3
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