7
Before you attempt to conduct the installation of the amplifier, it is recom-
mended to map out the complete audio system and the respective wiring
required. Consider all electrical requirements, i.e. safe mounting, sufficient
ventilation and availability of space to access the control panel. Please note
that – because of possible interference problems with the existing car elec-
trics and electronics – especially the routing of the signal cables and the
chassis ground connection will have a profound influence on a trouble-
free operation of the installed system. It is recommended to use quality
installation material.
If you have no or only little experience with car audio installations, we
strongly recommend to consult your nearest authorized EMPHASER dea-
ler/installer.
2.2 Selecting Operating Modes
(Bottom Panel Controls)
As the operating mode selector(s) are only accessible from the bottom panels
of the amplifiers, the operating mode has to be decided and set, before
mounting the amplifier.
– Switch Position "FLAT": Fullrange Mode, ideal for driving soundboards and
high-power-handling rear systems.
– Switch Position "HPF": High-Pass Mode, cutting the low frequency parts of
the music signal below the frequency setting on the side panel ("FREQ.
Hz"). This mode is ideal for driving coaxial and separate component spea-
ker systems.
– Switch Position "LPF": Low-Pass Mode, cutting the high frequency parts of
the music signal above the frequency setting on the side panel ("FREQ.
Hz"). This mode is ideal for driving subwoofer(s).
Please note that the 2-channel model EA2190 feature one single 3-position
mode selector, while the 4-channel model EA490 features two different
3-position mode selectors.
– Switch Modes „Front“: „LPF”, „FLAT“ or „HPF”
– Switch Modes „Rear“: „LPF”, „FLAT“ or „HPF”
Therefore the 4-channel amplifier EA490 allows driving a fully active stereo
subwoofer/satellite system consisting e.g. of a pair of coaxials or separate
component systems in the doors or dashboard operating in HPF mode (using
the two "FRONT" channels) and a subwoofer in the trunk operating in LPF
mode (using the two "REAR" channels see system configuration of the EA490).
The coaxials or component speaker system will be connected to the "FRONT"
section speaker outputs and the subwoofer(s) to the "REAR" speaker outputs.
Please note: In case your head-unit has a separate subwoofer-signal output
and you want to make use of the amplifiers integrated LPF mode, make sure
INSTALLATION PLANNING
EA2190490 Manual neu 31.07.2000 19:02 Uhr Seite 7
