JL Audio Slash v2 450/4V2 Owner's Manual page 4

Power ConneCtions
Before installing the amplifier,
disconnect the negative (ground) wire
from the vehicle's battery. This will prevent
accidental damage to the system, the vehicle
and your body during installation.
+12VDC Ground Remote
450/4
v2
Four-Channel System Amplifier
The 450/4v2's "+12 VDC" and "Ground"
connections are designed to accept 4 AWG power
wire. 4 AWG is the only recommended power
wire size for this amplifier.
If you are installing the 450/4v2 with other
amplifiers and wish to use a single main power
wire, use 2 AWG or 1/0 AWG main power wire
(depending on the overall current demands of
all the amplifiers in the system). This 2 AWG
or 1/0 AWG power wire should terminate into
a distribution block mounted as close to the
amplifiers as possible and should connect to the
450/4v2 with 4 AWG power wire.
Note: Smaller AWG numbers mean bigger wire
and vice-versa (1/0 AWG is the largest,
2 AWG is smaller, then 4 AWG, then
8 AWG, etc.).
Preamp Output Section
Preamp Output Section
Signal From
To connect the power wires to the amplifier,
first back out the set screw on the top of the
1 & 2 | 3 & 4 | All
amplifier, using the supplied 2.5 mm hex wrench.
Strip 1/2 inch (12 mm) of insulation from the
end of each wire and insert the bare wire into
the receptacle on the front panel of the amplifier,
Left Output Right Output Left Output
seating it firmly so that no bare wire is exposed.
While holding the wire in place, tighten the set
screw firmly, taking care not to strip the head
of the screw.
6 | JL Audio - 450/4 Owner's Manual
v2
The ground connection should be made using
the same gauge wire as the power connection
(4 AWG) and should be kept as short as possible,
while accessing a solid piece of sheet metal in the
vehicle. The surface of the sheet metal should
be sanded at the contact point to create a clean,
metal-to-metal connection between the chassis
Preamp Output Section
and the termination of the ground wire. For
optimal grounding, we recommend the use
of a JL Audio ECS master ground lug
(XB-MGLU). Alternatively, a sheet metal
screw or bolt can be used with a star washer.
Any wires run through metal barriers (such
Left Output
as firewalls), must be protected with a high
quality insulating grommet to prevent damage
to the insulation of the wire. Failure to do so
may result in a dangerous short circuit.
!
IMPORTANT
Many vehicles employ small (10 AWG - 6 AWG)
wire to ground the battery to the vehicle chassis
and to connect the alternator's positive
connection to the battery. To prevent voltage
drops, these wires should be upgraded to 4
AWG when installing amplifier systems with
main fuse ratings above 60A.
Fuse requirements
It is absolutely vital that the main power
wire(s) to the amplifier(s) in the system be
fused within 18 inches (45 cm) of the positive
battery post connection. The fuse value at each
power wire should be high enough for all of the
CH 1 & 2 Speaker Outputs CH 1 & 2 Bass Control
CH 1 & 2 Speaker Outputs CH 1 & 2 Bass Control CH 1 & 2 Filter Section
Signal From Bass EQ
Bass EQ Infrasonic Filter Freq. Range Filter Mode | Slope
equipment being run from that power wire. If
only the 450/4v2 is being run from that power
1 & 2 | 3 & 4 | All Off | On Off | 30Hz Off | On x1 | x10
wire, we recommend a 60A fuse be used. AGU
95
Either
75
feature
(big glass fuse) or MaxiFuse™ (big plastic-body
sums the
CH 1&2 input 60
Left Right
Left Right signals to
fuse) types are recommended.
150W 150W mono when
150W (1.5-4 ) 150W (1.5-4 )
50
activated.
No fuse is required or recommended directly Remote Remote
Bridged: 300W x 1 (3-8 ) Right Output Bridged: 300W x 1 (3-8 ) Filter Freq. (Hz)
Bass Port Bass Port
before the amplifier power connection. If one is
desired, we recommend the use of a 60A AGU
fuse or MaxiFuse™ type.
turn-on lead
The 450/4v2 uses a conventional +12V remote
turn-on lead, typically controlled by the source
unit's remote turn-on output. The amplifier will
turn on when +12V is present at its "Remote"
input and turn off when +12V is switched off. If
a source unit does not have a dedicated remote
turn-on output, the amplifier's turn-on lead can
CH 1 & 2 Speaker Outputs CH 1 & 2 Bass Control
be connected to +12V via a switch that derives
Signal From Bass EQ
power from an ignition-switched circuit.
1 & 2 | 3 & 4 | All Off | On
The 450/4v2's "Remote" turn-on connector
is designed to accept 18 AWG – 8 AWG wire. 12
Left Right
AWG is more than adequate for this purpose.
150W (1.5-4 ) 150W
To connect the remote turn-on wire to the
Remote
Right Output Bridged: 300W x 1 (3-8 )
Bass Port
amplifier, first back out the set screw on the top
of the amplifier, using the supplied hex wrench.
Strip 1/2 inch (12mm) of wire and insert the
bare wire into the receptacle on the front panel
of the amplifier, seating it firmly so that no bare
wire is exposed. When using smaller wire, it may
be necessary to strip 1 inch of insulation from
the wire and fold the bare wire in half prior to
insertion. While holding the wire in the terminal,
tighten the set screw firmly, taking care not to
strip the head of the screw and making sure that
the wire is firmly gripped by the set screw.
CH 1&2 / CH 3&4 inPut seCtions
The 450/4v2 has two separate input sections,
one for CH 1&2 and another for CH 3&4. Each
section contains a pair of RCA-type input jacks,
an "Input Voltage" switch and an "Input Sens."
rotary control.
CH 1 & 2 Filter Section CH 1 & 2 Input Section
CH 1 & 2 Input Section CH 3 & 4 Filter Section
Freq. Range Filter Mode | Slope Input Voltage Input Sens.
Infrasonic Filter Input Voltage Input Sens. Freq. Range
Off | 30Hz Off | 12dB | 24dB x1 | x10 Low | High Off | 12dB | 24dB Low | High x1 | x10
95 95
Filter Type
Either Filter Type Input Mode
75 130
130 75
feature
sums the
CH 1&2 input 200 60 200 60
signals to
mono when
LP | BP | HP LP | BP | HP 2ch | 4ch
50 500
500 50
activated.
1 & 2 1 & 2
CH 1 CH 2 CH 1 CH 2
Filter Freq. (Hz) Inputs and HP Filter Freq. (Hz)
(Left) (Right) (Left) (Right)
Only 3 & 4
The "CH 1&2 Input Section" also contains
an "Input Mode" switch to allow operation of
all four amplifier channels with one or two pairs
of input signals.
1) Input Mode Switch: If you wish to operate all
four channels of the 450/4v2 with a single pair
CH 1 & 2 Filter Section CH 1 & 2 Input Section
Freq. Range Filter Mode | Slope of stereo inputs, select the "2ch" position on
Infrasonic Filter Input Voltage Input Sens.
the "Input Mode" switch and connect a single
Off | 30Hz x1 | x10 Off | 12dB | 24dB Low | High
pair of input cables to the input jacks in the
95
Either Filter Type
75 130
feature "CH 1&2 Input Section". In this mode, the
sums the
CH 1&2 input 60 200
signals to
amplifier will route the signals connected to
mono when
LP | BP | HP
50 500
activated.
the CH 1&2 inputs to CH 3&4 as well.
CH 1 CH 2
Filter Freq. (Hz)
(Left) (Right)
If you wish to use separate inputs for CH 1&2
and CH 3&4 (to allow front-to-rear fading, for
example) and the source unit is equipped with
front and rear outputs, select "4ch" on the "Input
Mode" switch located in the "CH 1&2 Input
Section". In this mode, you must connect separate
pairs of input cables to each input section.
2) Input Voltage Range: A wide range of signal
input voltages can be accommodated by each
of the 450/4v2's input sections (200mV – 8V).
This wide range is split up into two sub-ranges,
accessible via switches located in each input
section of the amplifier. Be aware that each
input section's "Input Voltage" switch will
have to be configured, regardless of how many
input cables are actually feeding the amplifier.
The "Low" position on each "Input Voltage"
switch selects an input sensitivity range
between 200mV and 2V. This means that the
CH 3 & 4 Filter Section CH 3 & 4 Input Section
CH 3 & 4 Input Section CH 3 & 4 Speaker Outputs
Freq. Range High-Pass Filter Input Voltage Input Sens.
High-Pass Filter Input Voltage Input Sens.
"Input Sens." rotary control will operate
within that voltage window. If you are using an
Off | 12dB | 24dB x1 | x10 Low | High Off | 12dB | 24dB Low | High
aftermarket source unit, with conventional
95
Input Mode
Also sets
Also sets 75 130
130
low-pass
low-pass
preamp-level outputs, this is most likely the
cutoff for
cutoff for
200 60 200
CH 1 & 2 CH 1 & 2
Left
Bandpass Bandpass
position that you will use. The "High" position
2ch | 4ch Filter Filter
50 500 75W (1.5-4 )
500
(if selected) (if selected)
1 & 2 1 & 2
CH 3 CH 4 CH 3 CH 4 on each "Input Voltage" switch selects an
Inputs
and HP Filter Freq. (Hz) Bridged: 150W x 1 (3-8 )
(Left) (Right) (Left) (Right)
Only 3 & 4
input sensitivity range between 800mV and 8V.
This is useful for certain high-output preamp
level signals as well as speaker-level output
from source units and small amplifiers.
To use speaker-level sources, splice the speaker
output wires of the source unit or small
amplifier onto a pair of RCA plugs for each
input pair or use the JL Audio ECS Speaker
Wire to RCA adaptor (XB-CLRAIC2-SW).
CH 3 & 4 Filter Section CH 3 & 4 Input Section
Freq. Range High-Pass Filter Input Voltage Input Sens.
x1 | x10 Off | 12dB | 24dB Low | High
95
Input Mode
Also sets
75 130
low-pass
cutoff for
60 200
CH 1 & 2
Bandpass
2ch | 4ch Filter
50 500
(if selected)
1 & 2 1 & 2
CH 3 CH 4
Inputs and HP Filter Freq. (Hz)
(Left) (Right)
Only 3 & 4
CH 3 & 4 Speaker Outputs
Left Right
Right
75W 75W
75W (1.5-4 )
Bridged: 150W x 1 (3-8 )
7
CH