EA-AMP-12D-45A Installation Manual
Pg. 11
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R+ R-
L+
L-
Right
Speaker
Left
Speaker
Switch Set to NORMAL
(Up)
Switch Set to BRIDGED
(Down)
R+ R-
L+
L-
Speaker
(+) Positive
Speaker
(-) Negative
6.2. Speaker Connections and Setup
The EA-AMP-12D-45A has removable connectors to allow for the connection of two channels on each output
zone (1 left and 1 right) or one bridged mono channel if more power is needed. Follow the directions below to
properly connect speaker wiring.
6.2.1. Terminating Speaker Wire Connectors
Each output zone of the EA-AMP-12D-45A utilizes a 4-pole set screw type connector for speaker wire connection.
To terminate the connectors properly:
1. Strip the outer jacket (if applicable) of the speaker cable back about 2”, and then strip the insulation of each wire
back ¼“.
2. Loosen the set screws on the connector using a 1/8” flat blade screwdriver.
3. Twist the wires clockwise, insert them into the correct holes, and tighten the screws. Do not allow any strands
of copper to touch between the terminals to avoid short circuits.
6.2.2. Normal (Stereo) Output Zone
Many audio applications use paired speakers in each listening zone, playing stereo left and right audio channels
between the speakers. Typically, with multi-room audio or surround sound amplification, the left and right zones
will play at the same volume, and the speakers will be placed so that audio is balanced in the listening area.
6.2.3. Bridged Output Zone
For applications where more power is needed, any of the six output zones can be bridged together to make a
single output zone that is twice as powerful, but with twice the impedance (8 ohms instead of 4 ohms). This
is ideal for powering larger speakers or speakers on long cable runs. Bridging an output zone yields a mono
channel from two stereo channels. This reduces the outputs available on the back of the amplifier, but can be
beneficial in the right application.
For these applications, the EA-AMP-12D-45A amplifier offers 12 individual 4
ohm stable output channels arranged in 6 pairs of left and right stereo outputs.
Each output zone can be adjusted to the correct volume. Follow these
directions to connect the speakers.
Note: Be sure to follow the same wire color coding for “+” and “-” at both the
speaker and the amplifier connections.
1. Set the Bridge mode switch to 4/8Ω NORMAL.
2. Attach the left and right speaker channel wires to their respective terminals on
the connector. Follow the same color coding on the wire for “+” and “-” as used at the speaker.
See the next page for information on connecting and configuring inputs.
Note: Be sure to follow the same wire color coding for “+” and “-” at both the
speaker and the amplifier connections.
When using a bridged output, the connection pattern is different than normal
output wiring. “+” and “-” connections are marked on the amplifier chassis.
Follow these directions to attach speaker wiring to a bridged output.
1. Set the Bridge mode switch to BRIDGED (8Ω ONLY).
2.
Attach the speaker channel wires to their respective terminals on the
connector as seen in the diagram at right. Follow the same color coding on
the wire for “+” and “-” as used at the speaker.
See the next page for information on connecting and configuring inputs.
Important!
Do not attach a speaker load of less than 8 ohms to any output set for BRIDGED
operation. Doing so may cause the amplifier to put the channel into protection, or cause
permanent damage to the speakers or the amplifier.
