Alpine 3547 Service Manual page 8

CONNECTIONS
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BlueWhite)
| | Fuse (3A)
Ignition
Source
| |
Power i
_| As close as
ew)
Antenna SpST Switch possible tothe
teptional) ignition tap
Remote On
xine components'
loads
NG A HEAD UNIT WITH NO PRE-AMP OUTPUTS:
van be used with any high power or standard power head unit by
2aker outputs of these head units. This includes Alpine, other
and OEM factory-installed source units.
4311 speaker to pre-amp interface is needed to accomplish this.
atures low impedance, balanced inputs for better isolation, better
? immunity, and proper operation of the head unit controls such
ind fader.
e 4311 as shown below between the head unit and the 3547.
'ad Notes 1 through 3.
te Turn-On High or Standard Power Ground
head unit with speaker outputs
2 oe
! A |
Right Lett Right
Front Front Rear
RCA RCA RCA
pro Pra Fl Pre- Fi
% out py out BY out Be
U 4 U 0
3547 | (front) 3547 (rear) Ground C)
round
aroun 4311
| 3547 3547 |
CONNECTIONS
NOTE 1: Some head units' speaker outputs may have an inherent turn on
or turn off pop noise. Although the 4311 will prevent additional system noise
usually associated with large system upgrades of this type, it cannot improve
upon the design of the signal source. If there is a pop noise present in the
head unit, it will be amplified through the system and may be objectionable.
In such a case, the solution is to upgrade to an Alpine head unit.
NOTE 2: The 4311 can be mounted near the amplifier or near the head unit.
However, running long RCA cables may increase chances of encountering a
system noise problem. Therefore, mounting the 4311 close to the amplifier
is preferable.
NOTE 3: To avoid introducing system noises such as alternator whine,
ground all amplifiers, signal processors, 4311's and the head unit to the
same point on the chassis.
SWITCH SETTINGS |
Input'Mode Selector Switch
a) Set to the "ST" position (center) when the two channels are used in
stereo.
|
|
CH[1](MONO) ST CH[1]+
b) Set to the "[1] (MONO)" position when the two channels are used for one
channel of a stereo or bridged system.
a
CH[1](MONO) ST CH[t]+
c) Set to the "[1] + [2]" position when the two channels are used for a
subwoofer system which uses the right channel and left channel signals
summed.
CH[T](MONO) ST CHf]+(]
Input Gain Adjustment Control
After setting your head unit's volume control 1/4 of a turn down from the
maximum output level, rotate the Input Gain Adjustment Control with a #0
flat blade screwdriver and adjust the input gain to the point where there is
maximum volume with no distortion.
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