Installation Plan - EMPHASER EA490-200 Installation & Operating Manual

EA490200 Manual 28.07.2000 16:11 Uhr

2.1 Installation Plan

Before you proceed any further with the installation of the EA 490-200 am-
plifier, it is recommended to map out the complete audio system and the re-
quired wiring. Consider all electrical requirements, as well as safe mounting
of the amp unit, sufficient ventilation, convenient accessibility of all fuses and
gain/frequency knobs. Please note that - because of possible interference
problems with the existing car wiring and electronics - especially the routing
of the RCA signal cables and the chassis ground connection will have a pro-
found influence on a trouble-free operation of the overall system. For opti-
mum performance of this amplifier, it is recommended to use quality instal-
lation material.
If you have no or little experience with car audio installations, we strongly re-
commend to consult your nearest authorized EMPHASER dealer/installer.
2.2 Selecting Operating Modes
(„2-CH/4-CH INPUT MODE" switch)
The EA 490-200 offers two basic operating modes, depending on the num-
ber of input channels used from the head-unit. Note: If your head-unit
features a separate subwoofer RCA pre-out, it should not be
used!
8
Seite 8
,,2-CH INPUT MODE" is used with head units featuring only
one pair of RCA stereo pre-outs usually the rear pre-outputs (L&R). In
this case, the amplifier will be switched into „2-CH" mode (DIP switch up, see
fig. 1). This mode will let the amplifier distribute the incoming signal evenly
between front and rear channels, plus the subwoofer channel. In „2-CH" input
mode the front/rear fader option of the head-unit is de-ac-
tivated; i.e. the relative levels between the front and rear satellite speaker
system have to be set on the amplifier. The subwoofer channel always re-
mains unaffected by the front/rear satellite setting..
FRONT INPUTS
LEFT RIGHT
(2-CH INPUT)
L R
fig. 1
REAR INPUTS SUB LEVEL CONTROL
FRONT REAR REAR SPEAKERS
LEFT RIGHT INPUT
R
LEVEL FREQ. LEVEL FREQ. INPUT MODE SUB FREQ.
125 125 2-CH 80
50Hz 250Hz 50Hz 250Hz 4-CH 40Hz 120Hz
RCA Inputs
from
head-unit
FREQ. INPUT MODE
FRONT SPEAKERS SUBWOOFER
125 2-CH
GND +12V
L R L
Hz 250Hz 4-CH
Dip Switches
Up for „2-CH"
INPUT MODE