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2.5 SPEAKER IMPEDANCE & POWER WIRE INFO
3. AMPLIFIER MOUNTING
Warning: For your own safety, disconnect the negative battery terminal (GND) and
remove the main fuse (of existing system installs) in the positive power cable near the car
battery, before you start any installation or wiring work!
Before you proceed to install this EMPHASER amplifier, it is recommended to map out the com-
plete audio system and the respective wiring required. Consider all additional electrical require-
ments and accessories, such as power cables, interconnect cables etc., to complete this 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 connection 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 pas-
senger 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
5 cm 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 2,5 mm or 3 mm drill bit. For the actual mounting, always use the supplied
rubber washers before attaching the amp to the panel with the supplied mounting screws.
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! Electrical ground-loops can result in
audible hum!
The heat dissipation capacity of this amplifier line has been designed to cope with low impedance
loads. However, EMPHASER laboratories recommend to stay at or above the suggested impe-
dance ratings listed below:
EA1450XT
➡
4 ohms mono / 2 ohms mono
EA2250XT
➡
4/2 ohms stereo / 4 ohms bridged
EA4150XT
➡
4/2 ohms stereo / 4 ohms bridged
EA460-300XT
➡
4/2 ohms stereo CH 1-4/ 4/2 ohms mono CH5
Note: EMPHASER laboratories recommend a minimum main power cable cross-section (5 m
total length) of 25 to 35 mm², for both the positive and the ground wires. These recommendations
guarantee trouble-free operation of your amplifier, giving you full power output.
