Subwoofer Output - JL Audio Slash 500/1 User Manual

The "Boost" control determines how much
boost (in dB) you are adding to the bass signal.
A range of 0 - 15dB of boost is available.
The "Remote Bass Port" allows the connection
of an optional remote boost knob (the RBC-1)
that can be mounted in the front of the vehicle.
This optional control takes the place of the
"Boost" knob on the amplifier when connected
and bypasses the "Boost" control on the amplifier.
!
I M P O RTA N T
The "Advanced Bass Control" section will only
operate when the amplifier's filter is activated with
the "Amp LP Filter" switch in the "12dB" or
"24dB" position. It will not work with this switch in
the "Off" position.This is to prevent cascading the
processing of multiple amplifiers when configured
in a master/slave arrangement as shown in
Appendix C (page 16). If you are using an external
active crossover and would like to use the
"Advanced Bass Control" features, set the
"Amp LP Filter" switch on "12dB" and rotate the
frequency selection knob fully clockwise to the
"200 Hz" position.This will activate the "LF Boost"
and "Infrasonic Filter" controls without significantly
affecting the crossover point selected by the
external active crossover.

SUBWOOFER OUTPUT

The 500/1 employs JL Audio's exclusive
Regulated, Intelligent Power Supply (R.I.P.S.) design.
This sophisticated power supply allows the amplifier
to produce its optimum power (500 watts x 1)
over a wide range of speaker impedances.
Unlike conventional amplifiers that require a
specific impedance to produce optimum power, the
R.I.P.S.-equipped 500/1 gives you the freedom to
use a variety of subwoofer configurations that
10
achieve final nominal impedances between
1.5 – 4Ω (without sacrificing power output or
sound quality).
The operation of the R.I.P.S. circuitry is entirely
automatic and adjusts itself every time the amplifier
is turned on according to the lowest impedance
present at the speaker load.There are no user
controls to configure.The system operates through
multiple stages of impedance optimization, choosing
the stage most appropriate to the actual impedance
of the speaker(s) you connect to it.
!
I M P O RTA N T
If you connect a load higher than 4Ω nominal
to the 500/1, power will drop by half with every
doubling of impedance above 4Ω. If you connect a
load lower than 1.5Ω nominal to the 500/1, the
amplifier protection circuitry activates a "safe"
mode which reduces amplifier power to protect
the circuitry from failure (the yellow LED on the
top of the amplifier will light to indicate that this
has happened). See page 11 for details.
!
I M P O RTA N T
Speaker loads below 1.5Ω nominal are not
recommended and may cause the amplifier output
to distort excessively.
Speaker connections to the 500/1 are
straightforward and take place at the far right of the
front panel.You will notice that there are two "+"
positive connections and two "–" negative
connections.This is to facilitate multiple speaker
wiring.The two positive and two negative
connections are connected in parallel inside the
amplifier. Connecting two speakers, each to one set
of positive and negative terminals, will result in a
parallel speaker connection. If only connecting one
pair of speaker wires, it is not necessary to use both
sets of connections.
Do not chassis ground any speakers connected
to this or any other JL Audio amplifier. Doing so will
cause the amplifier to go into protection and mute
the output.
The 500/1's speaker connectors are designed
to accept 12 AWG – 8 AWG wire.
To connect the speaker wires to the amplifier,
first back out the set screws on the top of the
JL AUDIO 500/1
amplifier, using the supplied 2.5 mm hex wrench.
Strip 1/2 inch (12 mm) of insulation from each wire
and insert the bare wire end into the receptacles
on the front panel of the amplifier, seating them
firmly so that no bare wire is exposed.While
holding each wire in place, tighten each 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.
!
I M P O RTA N T
Do NOT attempt to "bridge" two 500/1's or
combine their output to a single load in any manner.
Doing so will damage the amplifier(s).
!
I M P O RTA N T
Before reconnecting the battery ground and
turning the system on, verify that all control settings
on the amplifier are set according to the needs of
the system.
STATUS INDICATOR LIGHTS /
PROTECTION CIRCUITRY
There are three status indicator lights on the top
of the amplifier. These are as follows:
1) "Power" (Green): lights to indicate that the
amplifier is turned on and operating normally.
2) "Thermal" (Red): lights to indicate that the
amplifier has exceeded its safe operating
temperature, putting the amplifier into a self-
protection mode, which reduces the power output
of the amplifier. The red light will shut off and the
amplifier will return to normal, full-power operating
mode if the heat sink temperature drops back to a
safe level.
3) "Low Ω" (Amber): lights to indicate that the
impedance of the speaker load connected to the
amplifier is lower than the optimum load impedance
range for the amplifier.When this light is on, a
protection circuit engages and reduces the power
output of the amplifier.The amber indicator will also
light when a short-circuit is detected in the speaker
wiring (this can be a short between the positive and
negative speaker wires or between either speaker
wire and the vehicle chassis).
JL AUDIO 500/1
There is only one condition that will shut
down an undamaged 500/1 completely...
If battery voltage drops below 8 volts, the entire
amplifier will shut itself off.The green "Power"
indicator on the top of the amplifier will turn off
when this occurs.The amplifier will turn back on
when voltage climbs back above 9 volts.This may
happen in a rapid cycle when bass-heavy program
material causes a weak charging system to dip
below 8 volts momentarily. If this is happening in
your system, have your charging system inspected to
make sure it is working properly. A 0.5 or 1.0 Farad
rapid-discharge capacitor connected in parallel to
the amplifier power connections may minimize
these short duration voltage dips in many systems
that are having this problem.
For information on troubleshooting this
amplifier, refer to Appendix D (page 18).
SERVICING YOUR JL AUDIO AMPLIFIER
If your amplifier fails or malfunctions, please
return it to your authorized JL Audio dealer so
that it may be sent in to JL Audio for service.
There are no user serviceable parts or fuses
inside the amplifier.The unique nature of the
circuitry in the JL Audio amplifiers requires
specifically trained service personnel. Do not
attempt to service the amplifier yourself or
through unauthorized repair facilities.This will not
only void the warranty, but may result in the
creation of more problems within the amplifier.
If you have any questions about the installation or
setup of the amplifier not covered in
this manual, please contact your dealer or the
JL AUDIO Technical Department for assistance:
(954) 443-1100
9:00 AM – 5:30 PM Eastern Time,
Monday – Friday
11