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SPEAKER IMPEDANCE & POWER WIRE INFO
It is recommended that you follow the optimum speaker / subwoofer impedance info sug-
gested below.
EA-MT1 → 4/2 ohms mono
EA-MT4 → 4/2 ohms stereo / 4 ohms mono bridged
AMPLIFIER MOUNTING
Attention! For your own safety, disconnect the negative battery terminal (GND) or re-
move the main fuse in the positive power cable near the car battery, before you start
any wiring work!
Before you proceed to install this EMPHASER amplifier, it is recommended to map out the
complete system and the respective wiring required. Consider all additional electrical require-
ments and accessories, such as power cables, interconnect cables etc., to complete the install.
Please note that - because of possible interference problems with the existing car electrics
and electronics - especially the routing of the signal cables and the chassis ground connec-
tion will have a profound impact on the trouble-free (noise free!) operation of the amplifier.
The mounting location should be carefully selected and in the interest of passive driver and
passenger safety, the amplifier must be securely mounted. Make sure that there is no wiring
harness, fuel tank etc. behind or below the mounting surface that may be damaged by the
drilling of the holes for the amplifier mounting screws. After installation, there should be a
clearance of at least 5cm to all sides including the top of the amplifier heatsink. Make sure
the unit is not exposed to direct sunlight, humidity, water, oil or spill of other fluids that may
enter the amplifier.
Once the location where the amplifier will be mounted is defined, use the unit as a template
for the marking of the mounting holes with pencil or felt-tip marker. The mounting holes should
be pilot-drilled, using a 2,0 mm or 2,5 mm drill bit. Bolt the amp down.
Important! There must not be a direct contact of the amplifier heatsink, bottom panel
or any other metal part of the amplifier to the vehicle metal panel! Electrical ground-
loops will cause audible hum!
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WIRE ROUTING
MAIN POWER WIRES
We recommend a minimum main power cable cross-section (5m total length) of 20 mm² (based
on pure copper cable), for both the positive and the ground wires. Following these recom-
mendations guarantees a trouble-free operation of your amplifier, as well as full power output.
Run the positive main power cable („+12V") directly from the positive terminal of the car bat-
tery to the amplifier. For protection of your car audio system against electrical fire hazards,
resulting from a short-circuit of the main power cable to chassis ground a main fuse holder
must be inserted within the first 30 cm of the positive main power cable. . The applicable fuse
value must be matched to the limitations of your main power cable AND the current draw of
the amplifier – therefore choose an appropriate fuse value. For a 20 mm² copper cable we
recommend a 60 Ampere M-ANL fuse.
Attach the ground cable to the amplifier. In most cases it will be best to keep the ground cable
(„GND") as short as possible, i.e. to find a chassis contact very close to the amplifier. The
ground power wire must have the same cross-section as the positive power cable. The contact
point where the ground wire is attached to, must be solid and clean, i.e. free from rust or paint!
Tighten both power input terminals of the amplifier, and double check for perfect fit of both
main cable leads!
RCA & REMOTE WIRES
For best interference free transmission of the music signal, use double or triple shielded RCA
interconnects only. Twisted pair Interconnects offer excellent noise rejection as well. Route the
RCA interconnects away from potential sources of Interference, such as engine computers,
gas pumps, etc.
Carefully run the audio signal interconnects, the remote wire and – if applicable– the cable of
the bass level remote control from the head unit or dashboard to the amplifier. As mentioned
before, the audio signal cables should always be routed completely separate from the power
cables. Connect the remote (turn on/turn off) lead to the respective input terminal of the ampli-
fier and to the remote output of your head-unit. Now you can connect the RCA interconnects
to the respective outputs of your head-unit and to the inputs of the amplifier. Pay attention to
connect the stereo interconnects correspondingly, left is 1CH and right is always 2CH a.s.o.
LOUDSPEAKER WIRES
For longer distances to the speakers, it is best to use 2.5 mm² or 4 mm² speaker cables to
avoid a loss of power or risk degradation of the signal quality.
Once the speaker cables have been routed, turn loose the screws of the speaker terminal,
insert the stripped and bare speaker cable ends and re-tighten the screws. Maintain correct
polarity („+" to „+"; „-„ to „-„).
Close the electrical circuit by attaching the ground wire to the battery and switch on your
head unit. The green status LED should turn on. If the status LED does not illuminate or the
red protect LED lights up, your installation is wrong! Immediately turn off your head-unit and
carefully re-check all installation and wiring steps!
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