Legacy Car Audio SHARP STEEL LA-1099 - Manual (Page 9)

LA-
499
LA-
799
LA-
1999
LA-
3199
LA-
4299
2CH AMPS
7
inputs
Input Connections
Low Level Ster
eo Input Connection
L/R audio outputs
head unit
High Level Ster
eo Input Connection
PLEASE NOTE! If using high level inputs, do not use the low level RCA inputs at the same time!
wiring har
ness
LR
LR
fr
om speaker terminals
head unit
orange black black orange
Electrical W
iring and Installation
Making Power Connections 1. Connect the +12V terminal dir
ectly to the car battery (+) terminal.
2. Connect the GROUND terminal dir
ectly to the car battery (-) terminal
OR to a good clean, paint-fr
ee chassis gr
ound point.
3. T
o
ensur
e a good gr
ound, and to pr
event “motor
-boating” noise in the
system, make an additional connection fr
om the car battery (-) terminal
to the chassis of the ster
eo unit, using 12 gauge minimum wir
e
.
4. Connect the REMOTE terminal to an exter
nal switch for positive 12V
tur
non-of
f. This may be connected to the head unit power antenna lead.
Installation Pr
ecautions
This amplifier comes complete with all mounting harwar
e r
equir
ed. Please r
e member that this is a high-power unit, which generat
es considerable electrical energy and
heat. Ther
efor
e, be sur
e to install the unit in a place with suf
ficient airflow
, a minimum of dust, and no moistur
e. Allow enou
gh space ar
ound the cooling fins to permit
reasonable airflow and cooling. • Befor
e you drill or cut any holes, investigate your car’
s layout very car
efully
. T
ake car
e when you work near the gas tank, f
uel lines, hydraulic line and electrical wiring.
• Do not operate the amplifier when it is unmounted. Attach all audio system components secur
ely within the automobile to pr
eve
nt damage, especially in an accident.
• Do not mount this amplifier so that the wir
e connections ar
e unpr
otected or in a pinched condition, or likely to be damaged b
y nearby objects. Be sur
e to select a
location inside your vehicle which has adequate ventilation. • Befor
e making or br
eaking power connections in your system, disconnect the vehicle battery
. Confirm that your head unit or ot
her equipment is tur
ned of
f while
connecting the input jacks and speaker terminals. • If you need to r
eplace the power fuse, only r
eplace it with a fuse identical to that supplied with the system. Using a fuse o
f a dif
fer
ent type or rating may r
esult in
damage to your system which isn’
t cover
ed by the manufactur
er’
s warranty
.
Setting Up and T
u
rning On Y
o
ur New Amplifier
After all electrical connections have been made, and physical installation is complete, tur
n on your ster
eo and listen for the
amplifier to tur
n on. If ther
e ar
e any unusual
noises fr
om the speakers, tur
n the ster
eo of
f and r
echeck ALL wiring.
Assuming the amplifier tur
n on normally
, you may have to adjust the LEVEL contr
ol(s) to match the output levels fr
om your head
unit. Follow these steps:
1. Set the volume contr
ol on your head unit to about the 2/3 position.
2. Adjust the amplifier LEVEL contr
ol(s) to an average listening position.
3. T
u
rn
the head unit volume all the way down, and listen for backgr
ound noise.
4. Start your vehicle, and again, listen for backgr
ound noise.
5. By fine tuning the LEVEL contr
ol(s), you can r
e duce backgr
ound and engine noise, if pr
esent.
These adjustments should only be made once. After that, use the head unit volume contr
ol to adjust the system volume, not the L
EVEL contr
ol(s).
CAUTION: Never turn the LEVEL contr
ol(s) up any higher than you need to get clear sound at 2/3 volume on the head unit.
to r
emote
tur
n-on
+12V
head unit
1 2V battery
Electrical Connections
(all models)
GROUND
+12V B
A T T
REM
FUSE
CH3
CH4 +
-
-
+
CH1
CH2 +
-
-
+
BRIDGED
-
+
BRIDGED
-
+
L
R LOW IN
POWER
PROTECT
REMOTE BASS BOOST
HI IN R L + --
+
L
R LOW IN
POWER
PROTECT
REMOTE BASS BOOST
HI IN R L + --
+