Lightning Audio L-2125 User manual

INTRODUCTION
Dear Customer,
Congratulations on your purchase. At Lightning Audio we are
pleased that you chose our product.
For maximum performance we recommend you have your new
Lightning Audio product installed by an Authorized Lightning
Audio Dealer. Please read your warranty and retain your receipt
and original carton for possible future use.
Visit our web site for the latest information on all Lightning Audio
products; www.lightningaudio.com
or, in the U.S. call1-888-881-8186 or FAX [phone]
Table of Content
2 Introduction
3 Specifications
4-5 Design Features
6-15 Installation
Installation Considerations
Mounting Locations
Battery and Charging
Wiring the System
16 Operation
Adjusting Level
Adjusting Crossover Frequency
Variable Phase
Bass Boost (Variable & Selectable)
Remote Level Control
17 Troubleshooting
18-23 Additional Languages
French
Spanish
German
Italian
24 Limited Warranty Information
If, after reading your manual, you still have questions regarding this product,
we recommend that you see your Lightning Audio dealer. If you need further
assistance , you can call us direct at 1-800-669-9899. Be sure to have your
serial number, model number and date of purchase available when you call.
Safety
This symbol with "WARNING" is intended to
A\ alert the user to the presence of important in-
L.1.1 WARNING structions. Failure to heed the instructions will
result in severe injury or death.
ihCAUTION
This symbol with "CAUTION" is intended to
alert the user to the presence of important in-
structions . Failure to heed the instructions can
result in injury or unit damage.
• To prevent injury and damage to the unit, please read and follow the
instructions in this manual. We want you to enjoy this system , not get
a headache .
•
If you feel unsure about installing this system yourself , have it installed
by a qualified Lightning Audio technician.
• Before installation , disconnect the battery negative (-) terminal to
prevent damage to the unit , fire and/or possible injury.
©2013 Rockford Corporation . All Rights Reserved. Lightning Audio and associated logos where applicable are registered trademarks of Rockford Corpora-
tion in the United States and/or other countries . All other trademarks are the property of their respective owne rs. Specifications subject to change without notice.
2

SPECIFICATIONS
L·21
25
L-4300 L-4600 L-5600
L ·
1250
L·1
5000
L-11
0000
Rated
Power
-
40x2
@4
ohms
50
x4
@4
ohms
100x4@
4
ohms
50x4
@4
ohms
150x
1@4
ohms
125x1
@4
ohms
250x1
@4
ohms
Continuous
Power
65x2@
2
ohms
75x4@
2
ohms
150x4
@2
ohms
75x4
@2
ohms
250x
1@2
ohms
250x1
@2
ohms
500
x1@2
ohms
Rating
(RMS)
Measured
125x1
@4
ohms•
150x2
@4
ohms·
300x2@
4
ohms•
150x2@
4
ohms•
500x
1@
1
ohm
1000x1
@
1
ohm
@
14.4V
Sub:
200
x1@4
ohms
S
ub
:
300x1
@2
ohms
Crossover
Slope
12dB/Oct
12
dB/Oct
12
dB
/
Oct
12
dB
/
Oct
12
dB
/
Oct
12
dB
/
Oct
12dB
/
Oct
Crossover
Frequency
Variable
50Hz-250Hz
Variable
50Hz-250Hz
Variable
50Hz-250Hz
Variable
50Hz-250Hz
Variable
50Hz
-
250Hz
Variable
50Hz·250Hz
Variable
50Hz-250Hz
SS
:
28Hz
Fixed
25Hz
HP
Fi
x
ed
25Hz
HP
Fixed
25H
z
HP
Bass
Boost
Selectable
Selectable Selectable
Variable
0·'
12dB
Va
ri
able
0-•
12dB
Var
i
able
0··
12dB
Variable
0-•
12dB
0
/'
6dB
/•
12dB
@
45Hz
0/•6dB
/'
12dB
@
45Hz
0
/'
6dB
/
•12dB
@
45Hz
@
45Hz
@
45Hz
@
45Hz
@
45Hz
Operating
Voltage
9-16VDC
9-16VDC
9-16VDC
9·
16VDC
9-16VDC
9-16VDC 9-16VDC
Frequency
Response
20Hz-20kHz
20
H
z-20k
Hz
20Hz-20k
Hz
20Hz-20kHz
25
Hz-250H
z
25Hz-250
Hz
25
H
z-250Hz
Sub
:
25Hz-250Hz
Batte(r
Fuse
Rating
25A
50
A
90A
70A
30A
50
A
90A
not
supplied)
THD+N
@
Rated
Power
<1
.0%@
4
ohms
<1.
0%
@4o
hm
s
<1
.
0%
@4
ohms
F/R: <1.0%@4
ohms
<1
.
0%
@4
ohms
<1.
0%
@4
ohms
<1.
0%
@2
ohms
<1.0%@2o
hms
<1
.
0%
@2o
hm
s <1.
0%
@4
ohms
<1.0%@2
ohms
<
1.0
%@
2
ohms
<1.
0%
@2
oh
ms
<1.0%@2
ohms
<1.
0%
@1
ohm
<1.0
%@
1
ohm
S
ub
:
<1.
0%
@4
ohms
<1.
0%
@2
ohms
Input
Sensitivity
1
50mV-4V
Low
L
evel
150mV-4V
Low
L
ev
el
150mV
-
4V
Low
Level
150mV-4V
Low
Level
150mV
-4V
Low
Level
150mV-4V
Low
Level
15
0
mV-4V
Low
Level
300mV-8V
Hi
gh
Level
300mV-8V
High
L
eve
l
300mV
-
8V
H
ig
h
Le
ve
l
300mV-8V
High
Leve
l
300mV-8V
High
Level
300mV-8V
Hi
gh
Level
300mV-8V
High
Le
ve
l
Input
Impedance
20k 20k 20k 20k
20k
20k 20k
SIN
Ratio
CEA
2006
>8
0dB
>
80dB
>
BOdB
F/R:>
BOdB
>BO
dB
>
BOdB
>
BOdB
Sub
:>
BOdB
SIN
Ratio
@
Rated
>
100dB
>
100dB
>
100dB
F/
R:>
100dB
>
100dB
>
100dB
>
10
0
dB
Power
S
ub
:
>1
00dB
Channel
Separation
>50d
B >
50dB
>
50dB
>
50dB
N/A N/A N/A
Common
Mode
Rejec
-
lion
Ratio
>40dB
>
40dB
>40dB
>
40dB
>40dB >40dB
>40dB
Damping
Factor
>
200
>
200
>2
00
F/R
:
>2
00
>200
>
200
>200
S
ub
:>
200
Dimensions
(LxWxH)
7.9"
x7
.6"x2.3"
17
.
4"
x7.6" x2.3"
17.4
"x
7.6"x2.
3"
17
.4"x7.6"x2.3" 11.8"
X
7.6
"
X
2.3"
7.
9"x7.6"
x2.3
"
11.B
"x7.6"
x2
.
3"
(20cm
x1
9.4em
x5.8
em)
(4
4
.1em
x
19.4em
x
(4
4.1em
x
19
.
4em
x
(4
4.1em x
19.4em
x
(30cm
x19.
4em
x
5.8
em)
(20cm
x
19
.
4em
x
5.8
em)
(30cm
x
19
.
4em
x
5.8
em)
5.8
em)
5.8em) 5.8
em)
*
Rated
power
when
amplifier
is
wired
in
a
bridged
configuration.
CEA
2006
Power
rat1ngs
onl
'Qtllnin~
Audio
arnplil1ers
conform
tc
CfA-2006
industry
standards.
These
guidelines
mean
your
amplifier's
output
power
ratings
are
REAL
POWER
11umbers
not
inflated
marketing
rat
ings.
3

DESIGN FEATURES
level Control
The level control is used to match the output of the
audio source.
High level Inputs - Optional Inputs
Accepts High Leve l speaker signal when ut ilizing
the harness provided.
RCA Input/Pass- Thru Jacks
The RCA Inputs/Pa ss- Thru Jacks are nickel -plated to
resist the signal degradation caused by corrosion . The
Pass- Thru provides a convenient source for daisy-
chaining an additional amplifier without running an
ex tra set of RCA cables from th e front of the vehi c le to
the rear amplifier loc a tion .
Power/REM Terminals
T he Power and G round Termina ls are nickel - plat -
ed set - scre w wir e connectors and will accommo -
dat e4 AWG . The REM Te rmin al isa ni c kel - plat ed
se t- screw wir e connector and will acco mmodate
8AWG.
HIGH LE\ LINPUT FR NT
r- INPUT ---, + _ + _ !-£' E';
- ~ @) ®) :ll:::: ' ~~~.:.
---ti-----ff-- 0 0 LEVEL
© m @) @) @) .[~d~.;,
4
b;:;;;;;~=h&. FRONT REAR SUB +_ +_
CLlJ 11?'='---------=---=----
1 I
Speaker Terminals
The Speaker Terminals are nick el -p l ated
set-screw wir e co nn e ctor s(+ and -) will
accommodate 8 AWG.

Crossover
Switch
Selectable
switch
for
Low-Pass
(LP)
or
All
Pass
(AP)
or
High-Pass
(HP)
DESIGN
FEATURES
Variable
Crossover
A
built
-
in
12dB/octave
Butterworth
filter
with
a
crossover
point
variable
from
50Hz
to
250Hz
_
(L
-
1250
, L
-15000
&
L
-11
OOOD
have
an
additional
25Hz
fi
xed
subsonic
filter
at
24/dB)
HP-AP-LP
FRONT
FREQ
.
=-
[IJ
1
100~175
•
LP
REAR
REQ
.
100. .175
75.
•
225
75·~·225
•
50
iso
MIN
M.u
50
iso
SUBFREQ.
PHASE
100
~175
o•
tao•
·~·
50
i5o
BASS
BOOST
REMOTE
LEVEL
POWER
0----~~~~----------
0
PROTECT
Remote
level
Control
Remotely
control
the
subwoofer
output
level
of
the
amplifier
.
Bass
Boost
Power/Protect
LED
Power
LED
illuminates
green
when
the
uni
t
is
turned
on
_
ProtecV
Thermal
LED
illuminates
red
when
amplifier
overheats
or
short
circu
i
ts
.
The
amplifier
will
automatically
shut
down
if
this
occurs.
Thi
s
va
r
iable
control
works
along
with
the
cross
o
ver
swit
ch
on
the
ampli
f
ier
,
boosting
the
bass
f
re
quencies.
Variable
Phase
T
he
variable
0-
180
.
pha
sec
ontrol
allows
the
list
ener
to
c
hange
the
a
rriv
al
tim
e
of
th
e
subwoof
er s
ound
wav
es
re
la
tiv
eto
th
e
sa
mefre
qu
en
cies
f
rom
thema
in
sp
ea
kers.
illus
.-
1.1
s

INSTALLATION
Contents
• Lightning Audio Amplifier
• Remote Level Control
(L-5600, L-1250 , L-15000&
L-110000)
Installation Considerations
• High Level Input Connector
• Installation & Operation
Manual
The following is a list of tools needed for installation:
• Fuse-holder and fuse . (See • Hand held drill w/assorted bits
specifications for fuse rating)
• Volt/Ohm Meter
• Wire strippers
• Wire crimpers
• Wire cutters
• #2 Phillips screwdriver
• Battery post wr enc h
•
Assorted connectors
• Adequate Length-Red
PowerWire
• Adequate Length-Remote
Turn-on Wire
• Adequate Length-Black
GroundingWire
This section focuse s on some of the vehi c le conside ration s for i nstall-
ing your new amplifier. Pre - planning your s ystem layout and best wir i ng
routes will save installation time. When deciding on the layout of your new
system, be sure that each component will be easily accessible for making
adjustments.
.&,. CAUTION Before installation, disconnect the battery neg-
ative (- )terminal to prevent damage to the unit ,
fire and/or possible injury .
.&,_ CAUTION Before beginning an y installation, follow these
s impl e rules:
1. Be sure to carefully read and understand th e in s truction s before
attempti ng to in stal l th e unit.
2. For safet y, disconnect the negative lead from the battery prior to
beginning the installation.
3. For easie r assemb ly , we suggest you run all wir es prior to mounting
your unit in place .
4. Route a ll of the RCA cables c lo se together and away from an y high
cu rr ent wir es .
5. U se high quality connec tor s for ar eliable installation and to minimize
si gna l or power l os s.
6
6. Think before you drill! Be careful not to cut or drill i nto gas tanks, fuel
lines, brake or hydraulic lines , vacuum lines or electrical wiring when
working on any vehicle.
7. Never run wires underneath the vehicle. Running the wires i ns ide the
vehicle provides the best protect i on.
8. Avoid running wires over or through s harp edges. Use rubber or
plastic grommets to protec t any wires routed through metal, especially
t he firewall.
9. ALWAYS protect the battery and electrica l system from damage with
proper fusing . Instal l the appropriate fuse holder and fuse on the+ 12V
power wire within 18 " (45.7 em) of the b atter y te rm inal.
10. When grounding to the chassis of the vehicle , scrape a ll paint from
the metal to ensure a good , clean ground connection. Grounding
connections should be as short as possible and always be connected
to metal that is welded to the main body , or chassis, of the veh i cle.
Seatbelt bolts should never be used for connecting to ground.
Mounting Locations
To ensure optimal performance , mount the amplifier with at least
1" (2.54cm) of air gap around the amplifier's heat sink to provide
proper cooling.
Trunk Mounting
Mounting the amplifier v ertica lly or inver t ed will provide adequate cool-
ing of the amplifier. Mounting the amplifier on the floor of the trunk w il l
provide the best cooling of the amplifier.
Passenger Compartment Mounting
Mounting the amplifier in the passenger compartment will work as long as
you provide as uffi c ie nt amount of air for the amp li fier to coo l itse l f. If you
are going to mount the amplifier under the seat of thev ehic l e, yo u must
have at le ast 1" (2 . 54cm) of air gap around the amplifier's heats ink .
,r.... CAUTION N ever mountth is unit i ~ t~e eng i ne _ compar t-
~ ment. Mountmg the un1t m the eng 1n e com -
partment will void your war r anty.
Battery and Charging
Amplifi ers will put an increased l oad on the ve hi cl e's battery and charging
system. We recommend checking your al ternator and battery cond i tion
to ensure that the electrical system has enough capacity to handle the
increased load of your stereo system. Stock electrica l systems, whi ch are
in good condition, should be ab le to handle the extra load of any Lighting
Audio Series amp lifi er without problems, a lthough battery and alt e rnator
life can be reduced slight ly . To maximi ze the pe r formance of your ampli -
fier, we suggest the use of a hea vy duty battery a nd an energy sto r ag e
capac it or.

Wiring the System
6CAUTION
If you do not feel comfortable with wiring your
new unit, please see your local Authorized
Lightning Audio Dealer for installation.
6 CAUTION Before installation, disconnect the battery neg-
ative(-) terminal to prevent damage to the unit,
fire and/or possible injury.
6CAUTION
Avoid running power wires near the low level
input cables , antenna , power leads, sensitive
equipment or harnesses . The power wires car-
ry substantial current and could induce noise
into the audio system.
1. Plan the wire routing. Keep RCA cables close together but isolated
from the amp I ifier 's power cables and any high power auto accessories,
especially electric motors . This is done to prevent coupling the noise
from radiated electrical fields into the audio signal. When feeding
the wires through the firewall or any metal barrier, protect them with
plastic or rubber grommets to prevent short circuits . Leave the wires
long at this point to adjust for a precise fit at a later time.
2. Prepare the RED wire (power cable) for attachment to the amplifier by
stripping 1/2" of insulation from the end of the wire. Insert the bared
wire into the B+ terminal and tighten the set screw to secure the cable
in place.
NOTE: The B+ cable MUST be fused 18" or less from the vehicle's battery.
Install the fuseholder under the hood and ensure connections are water
tight.
3. Trim the RED wire (power cable) within 18" of the battery and splice in
a inline fuse holder (not supplied). See Specifications for the rating of
the fuse to be used. DO NOT install the fuse at this time.
4. Strip 1/2" from the battery end of the power cable and crimp an
appropriate size ri ng terminal to the cable . Use the ring terminal to
connect to the battery positive terminal.
5. Prepare the BLACK wire (Ground cable) for attachment to the amplifier
by s tripping 1/ 2" of in s ulation from the end of the wire. Insert the bare
wire into the GROUND terminal and tighten the set screw to secure the
cable in place . Prepare the chassis ground by scraping any paint from
the metal surface and thoroughly clean the area of all dirt and grease .
Strip the other end of the wire and attach a ring connector. Fasten the
cable to the chassis using a non - anodized screw and a star washer.
NOTE : Keep the length of the BLACK wire (Ground) as short as possible .
Always less than 30".
7
INSTALLATION
6. Prepare the Remote turn-on wire for attachment to the amplifier by
stripping 1/2" of insulation from the end of the wire . Insert the bared
wire into the REMOTE terminal and tighten the set screw to secure the
wire in place. Connect the other end of the Remote wire to a switched
12 volt positive source . The switched voltage is usually taken from the
source unit's remote amp on lead.lf the source unit does not have this
output available, the recommended solution is to wire a mechanical
switch in line with a 12 volt source to activate the amplifier.
7. Securely mount the amplifier to the vehicle or amp rack . Be careful not
to mount the amplifier on cardboard or plastic panels . Doing so may
enable the screws to pull out from the panel due to road vibration or
sudden vehicle stops.
8. Connect from source signal by plugging the RCA cables into the input
jacks at the amplifier.
NOTE: All "ACTIVE" inputs must have RCA jacks connected. When con-
necting to the 5-Channel inputs, be sure to route front , rear and sub RCA
cables tightly together.
Lt._ CAUTION
Always ensure power is off or disconnected at
the amplifier before connecting RCA cables .
Failure to do so may cause damage to the am-
plifier and/or connected components.
Note: When the installation requires a High Level (Speaker) input, use the
included connector to tie into your vehicles speaker wiring .
9.
Connect the speakers. Strip the speaker wires 1/2" and insert into the
speaker terminal and tighten the set screw to secure into place . Be
sure to maintain proper speaker polarity . DO NOT chassis ground any
of the speaker leads as unstable operation may result.
10. Perform a final check of the completed system wiring to ensure that all
· connections are accurate. Check all power and ground connections
for frayed wires and loose connections which could cause problems.
Install inline fuse near battery connection.
NOTE: Follow the diagrams for proper signal polarity.
Lt._ CAUTION
This amplifier is not recommended for im-
pedance loads below 2-0hm stereo/4-0hm
bridged for the front/rear channels and 2-ohm
for the sub channel. Models L- 1500D and L-
11 OOOD are not recommended for impedance
loads below 1- 0hm.

INSTALLATION
2-Channel [Stereo)
L-2125
Source Unit
PASS-THRU
Connects to inputs of
2nd Amplifier
•Installation optio n fo r multi - amp
install
---------~- - -,
L--------=:D·-- -- -- --- ~-
I
Switched 12V
to
REM
Connect to chassis
ground of vehicle
*Keep grounds as short
as possible
Less than 18"
+
L·2125
PDS NEG
ill us .- 2.1
jJ
20min .
'lleep grounds as short
as possible
20min.
a
Amplifier
... .
ffi n ·0·m
M m

2-
Channel
[Mono)
L-2125
Source
Unit
PASS-THRU
Connects
to
inputs
of
2nd
Amplifier
"Installa
tio
n o
ption
for
multi
-
amp
Install
,.,
~------.I
I
---------~---1
L------rnm::::::D.---------
~-
I
Switched 12V
to
REM
Connect to
chassis
ground of vehicle
'
Keep
grounds
as
short
as
possible
Less than 1
8'
+
PDS
NEG
40min
.
'Keep grounds
as
short
as
possible
9
I ·
I
INSTALLATION
Amplifier
11l
us
.-2
.2

INSTALLATION
4-
Channel
[Stereo)
L-4300 and L-4600
Source
Unit
_
__,r>-._
-- - -- --- -- --
~
------- - ---'
~
'.
I
I
Switched 12V
to
REM
Connect to
chassis
ground
of
vehicle
'Keep
~rounds
as
short
as
possible
Less than 18"
illu
s.
-2.3
20min
.
20min
.
'Keep
~rounds
as
short
as po
ssi
ble
20min
.
20min
.
10
Amplifier
':"":'it
...
(2)
.
...
H
i~
--
n·0·m
H i)l

4-Channel (2ch Stereo &
lch
Mono-Bridged)
L
-4
300
and L-
4600
Source Unit
,.,
......
----...JLJ-0-------------~-----------
:
.
-,......__...)-'-------
-~-
--------------------:
"""---..JLJ-0----
---
-~------
--------------
I
Switched 12V
to
REM
Connect to
chassis
ground
of vehicle
·Keep
grounds
as
short
as
possible
Less than 18"
+
UA
25A
20min
.
40min
.
POS
NEG
·Keep
grounds
as
sho
rt
as
possible
20min.
1 1
I
IN
ST
ALLATI
CJ
N
Amplifier
ill
us
.-2.4

INSTALLATION
4-Channel (2ch Mono-Bridged)
L-4300 and L-
4600
Source Unit
Switched 12V
to
REM
Connect to
chassis
ground
of
vehicle
'Keep grounds
as
short
as
possible
Less
than
1B"
+
25A
2SA
40min
.
POS
NEG
illu
s.-
2.5
'Ksep grounds
as
short
as possible
Amplifier
40min
.
1 2

INSTALLATION
3-Channel (2ch Bridged & lch Parallel)
L-5600
Source Unit
-------~-----------------~
-------~----------------,--·
---u..a4.,_...AJ.'- - - - - - - - - ~- - - - - - - - - - - - - - - - :
---wu.'--ll.J-'-------- -~--------------:
Switched 12V
to
REM
Connect to chassis
ground
of vehicle
'Keep grounds as short
as possible
Less than 18"
40 min.
'Keep grounds as short
as possible
40min .
1 3
I
Amplifier
@
I I I - lMLIII'IIT - ~ -IIIQ. - II'-INI -I'IIQ.
1 ·-~ 1· - ·- ~ [JJ]• • '" - ClJ """"'"
.1. ~ I •IEl)-0· n G= •n 0 " "W "'
,. @) 0 1 @) ~ ~ -.. • .. .. -•..
.. 0 Q · ~ J:.. •lllll ---
a @) (@) ~. M 0 Ei5 0 0. @ g
_.- - U ~ H l.W M +l ~~ ~
illu s.-2.6

INSTALLATION
5-Channel (4ch Stereo & lch Mono)
L-5600
Source Unit
"'"""'"Wl ~I ------~-------------- - ---·
-
,I,
.............um I ------~---- - ------------':'
'"""''IIII I[}-------~-----------------~
---mill I[}-------~ - -------- - ---- - - ' ~ ' :
I I
I I
I I
--------~------ - -- - -----~
I
---mill I
---------~-------- 7 ----- ~ :
I
Switched 12V
to REM
GNO R B• FUSE sus Q lF d) ll 0 @
~!~~ I I or1 ;U~~
© IL @
~~ - -+ L _ -s _ 6 _ o _ o +- _ " _ ' - "-r "" =r-+' :..: ' r---r="+-+ ""1 ~
I I I
I I I
I I I
I I I
I I I
I I I
I
I
I
I
I
I
I
I
I
Tconnect to chassis
Iground of vehicle
'Keep grounds as short
as possible
( Fuse
.-- --,
01 10
)"0 [ ~\
20 min. 20 min.
20min.
Less than 1B" I).,
,.............._ __ __,_....._,
*Positive(+) and Neg at ive(- ) out pu ts
are wired in para ll el i nte rn a ll y.
illus.-2.7
+
POS
NEG
'Keep grounds as short
as possible
14
20 min. 20 min.
Amplifier

INSTALLATION
Parrallel
Wiring
*
L-1250, L-
15DDD
&
L-11
DODD
Source
Unit
PASS-THRU
Connects to inputs
of
2nd Amplifier
"Installation option lor multi-amp
Install
Switched 12V
to
REM
Connect to
chassis
ground
of
vehicle
·Keep grounds
as
short
as
possible
Less
than
1B"
~----------------
-,
~-----
-
---------
..
' r
'-
,
~-------------------
-,
~-----
-
-----------
Amplifier
o@ ' @
NEG
20min.
L-15000
& L-
11
0000
40min
.
L-1250
·
Ke
ep grounds
as
short
as
po
ss
ible
20min.
L-15000 & L-110000
·Paralleled internally for 1 0 min. load.
40min
.
L-1250
•Paralleled internally for 2 0 min. load.
1 5
ill
us.
-
2.8

Adjusting Level
1. Turn amplifier levels to minimum (counter-clockwise).
2. Turn the source unit volume up to 7/8 maximum (or
when distortion is just inaudible) .
ill us.-3.1
LEVEL
· 0. ·
MIN MAX
3. Slowly increase amplifier level control until adequate volume is
achieved.
NOTE: Best signal to noise and dynamic range are realized with gain set to
minimum. For a more in depth setting procedure, contact Lightning Audio
Technical Support.
A>. CAUTION A~oid ~ettin~ amplifie~ gain high as noise and
~ d1stort1on w1ll greatly mcrease.
Adjusting Crossover Frequency
illus. -3.3
Do the following individually for each channel.
il\us.-3.2 100
175
Placing the crossover switch in the HP posi-
tion sets the amplifier to the High Pass mode,
enabling frequencies above the cut - off point to
pass, adjustable between 50-250Hz .
HP-AP-LP
ICIJ I
75· 0. ·225
50 250
FREQ.
Hz
Placing the crossover switch in the APposition sets the amplifier to the All
Pass mode, preventing any crossover adjustment, allowing all frequencies
to pass .
Placing the crossover switch in the LP position sets the amplifier to the
Low Pass mode, enabling frequencies below the cut-off point to pass,
adjustable between 50-250Hz .
Turn the crossover adjustment knob all the way down . With the system
playing, turn the crossover adjustment knob up slowly until the desired
crossover point is achieved.
Variable Phase
Allows you to conveniently switch the output phase of the
amplifier between oo and 180 °. This has the same effect
as physically reversing the Positive (+) and Negative (-)
speaker wires .
High Level Input
ill us.-3.4
PHASE
I ccJ I
o• tso•
High Level Inputs are used when you want to connect an amplifier to your
factory radio or an aftermarket radio that does not have low - level (RCA)
inputs. It allows you to use the signal coming from the speaker outputs as
an input source for the amplifier .
1 6
OPERATION
Bass Boost
This works along with the crossover switch on the amplifier. When set to
Low-Pass (LP) operation, this is a variable Bass Boost. When set to High-
Pass (HP) operation, this is a variable Mid-Bass and Treble Boost. When
set to All-Pass (AP) operation, both the Bass and Treble frequencies are
boosted . Set this to your personal preference while listening to the system.
Maximum
Boost
+20
+18
+16
BASS +14
~ :-:::
~
1
ds·•
--· ·-J +6
I OdB +12dB
I +4
I +2
[ _______ ..,
Minimum -2
111
i~
=F
. t·- .
, I ~
I
1: l
l1 I
~ t¥
.y -- ·
~
I
IK '
~
T
--
I
i
r
I I
'I
•I I
tttmrtt=h.
Flat 20 , 5o 100 200 5oo 1k 2k
Bass Hz
illus .-3 .5
~
I
I
I
I
5k 10k 20k
Variable 0-+ 12dB @ 45Hz (L-5600, L -1250, L -15000 &L -11 0000)
illus .-3.6
Maximum •
20
Boost •18
+16
dB
+14
BASS BOOST r . • 12
I OJI I +10
OdB +6dB +12dB_! +8
I I 1 - +6
: ~ -- -' +4
I +2
,__ _______ ..0
Minimum -2
Flat 20
6
~!: 1oo 2oo 5ooHz 1k 2k
r- ·1 :1 i I li I !
!
-i+
-l-- I
II
I
g I
II I
'
;;# -1
-t l
1-
-
·-
I
!/
1:1 I
I['
I
v 1:1 I ' I I
v
ii1 \
1-
t
,_
H
-j
~ : t
t _l +
'+
+
rt
I~
Sk 10k 20k
Selectable : 0/+6dB/+ 12dB @45Hz (L - 2125, L -4300)
Lt. CAUTION Over excursion and subsequent damage may
• occur at high levels of boost.
Remote Level Control (Option)
Quick Install:
1. Using the screws supplied , install the mounting clip .
2. Slip the remote onto the mounting clip until it snaps into place.
3. Route and connect the cable to the remote and amplifier.
Operation:
4. When connected, the " Level Control" is linked and allows you to
remotely control the output level of the amplifier from the dash or
center console .

TROUBLESHOOTING
Troubleshooting
NOTE: If you are having problems after installation follow the Trouble-
shooting procedures below. ·
Check Amplifier for proper connections. Verify that POWER light
is on. If POWER light is on skip to Step 3, if not continue.
1. Check in-line fuse on battery positive cable . Replace if necessary.
2. Check fuse(s) on amplifier. Replace if necessary.
3. Verify that Ground connection is connected to clean metal on the
vehicle 's chassis. Repair/replace if necessary.
4. Verify there is 9 to 14.4 Volts present at the pos i tive battery and
remote turn-on cable. Verity quality connections for both cables at
amplifier, stereo. and battery/fuseholder. Repair/replace if necessary.
Protect light is on.
1. If the Protect light is on, this is a sign of a possible short in the
speaker connections. Check for proper speaker connections and use
a voiVohm meter to check for possible shorts in the speaker wiring.
Too low of a speaker impedance may also cause Protect to light.
Check Amplifier for audio output.
1. Verify good RCA input connections at stereo and amplifier. Check
entire length of cables for kinks, splices. etc . Test RCA inputs for AC
volts with stereo on. Repair/replace if necessary .
2. Disconnect RCA input from amplifier. Connect RCA input from test
stereo directly to amplifier input.
Check Amplifier if you experience Turn-on Pop.
1. Disconnect input signal to amplifier and turn amplifier on and off .
2.
If the noise is eliminated. connect the REMOTE lead of amplifier to
source unit with a delay turn-on module.
OR
1. Use a different 12 Volt source for REMOTE lead of amplifier .
1 7
Check Amplifier if you experience excess Engine Noise.
1. Route all signal carrying wires (RCA, Speaker cables) away from
power and ground wires .
OR
1. Bypass any and all electrical components between the stereo and the
amplifier(s). Connect stereo directly to input of amplifier. If noise goes
away the unit being bypassed is the cause of the noise.
OR
1. Remove existing ground wires for all electrical components. Reground
wires to different locations . Verify that grounding location is clean,
shiny metal free of paint, rust etc.
OR
1. Add secondary ground cable from negative battery terminal to the
chassis metal or engine block of vehicle.
OR
1. Have alternator and battery load tested by your mechanic. Verify good
working order of vehicle electrical system including distributor, spark
plugs, spark plug wires, voltage regulator etc.

LIMITED WARRANTY STATEMENT
Lightning Audio offers a limited warranty on products on the following terms:
Length of Warranty
Headunits - One year replacement warranty from date of original purchase- requires proof of purchase.
Speakers- One year replacement warranty from date of original purchase - requires proof of purchase.
Amplifiers- One year replacement warranty from date of original purchase- requires proof of purchase .
What is Covered
This warranty applies only to Lightning Audio products sold to consumers by an authorized Lightning Audio Dealer in the United States of
America. Products purchased by consumers from an authorized Lightning Audio Dealer located outside of the USA are covered by the autho-
rized Lightning Audio Distributor for the country in which the products were purchased .
Who is Covered
This warranty covers only the original purchaser of Lightning Audio product purchased from an authorized Lightning Audio Dealer in the
United States. In order to receive service, the purchaser must provide Lightning Audio with a dated copy of the sales receipt stating the cus-
tomer name, dealer name and product(s) purchased . Products found to be defective during the warranty period will be replaced (with a product
deemed to be equivalent at Lightning Audio's sole discretion) by Lightning Audio.
What is Not Covered
1. Damage caused by accident, misuse, abuse, improper installation or operation, water or moisture, excessive heat, theft , or shipping
2. Any cost or expense related to the removal or reinstallation of product
3. Items previously repaired, serviced or modified by an unauthorized service center
4. Any product which has had the serial number defaced, altered, or removed
5. Subsequent damage to other components
6. Any product purchased outside the U.S.
7. Any product not purchased from an authorized Lightning Audio Dealer
Limit on Implied Warranties
Any implied warranties of fitness for use and merchantability are limited in duration to the period of the express warranty set forth above. Some
states do not allow limitations on the length of an implied warranty, so this limitation may not apply . No person is authorized to assume for
Lightning Audio any other liability in connection wi th the sale of the product.
How to Obtain Service
Defective products should be returned to your local authorized Lightning Audio Dealer for warranty service or, you may call1-888-881-8186
for Lightning Audio customer service . You must obtain an RA# (Return Authorization number) prior to returning any product to Lightning
Audio . Return Authorizations are valid for 30 days . You are responsible for the shipment of defective product to Lightning Audio and you
MUST include valid proof of purchase. Mark your RA# clearly on outside of your shipping carton . Products received without a valid RA# will
be refused and returned to sender at sender's expense.
24

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01
........
C\J
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955
N.
FIESTA
BLVD,
SUITE
4 •
GILBERT,
ARIZONA
85233
U.S.A.
•
(800)
726-8178
WWW.LIGHTNINGAUDID.COM
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