10
| JL Audio - 250/1
v2
Owner’s Manual
11
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).
There is only one condition that will shut down
an undamaged 250/1v2 completely… If battery
voltage drops below 10 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 10 volts. This may
happen in a rapid cycle when bass-heavy program
material causes a weak charging system to dip
below 10 volts momentarily. If this is happening
in your system, have your charging system
inspected to make sure it is working properly.
For information on troubleshooting this
amplifier, refer to Appendix D (page 14).
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 technical support.
Jl audio technical support:
(954) 443-1100
9:00 AM – 5:30 PM (Eastern Time Zone)
Monday - Friday
subwooFer outPut
The 250/1v2 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 (250 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 250/1v2 gives
you the freedom to use a variety of subwoofer
configurations that 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.
IMPORTANT
!
If you connect a load higher than 4Ω nominal
to the 250/1v2, power will drop by half with
every doubling of impedance above 4Ω. If you
connect a load lower than 1.5Ω nominal to the
250/1v2, the amplifier protection circuitry
activates a “safe” mode which reduces amplifier
power to protect the circuitry from failure (the
amber LED on the top of the amplifier will
light to indicate that this has happened).
IMPORTANT
!
Speaker loads below 1.5Ω nominal are not
recommended and may cause the amplifier
output to distort excessively.
Speaker connections to the 250/1v2 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 250/1v2’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
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.
IMPORTANT
!
Do NOT attempt to “bridge” two 250/1v2’s or
combine their output to a single load in any
manner. Doing so will damage the amplifier(s).
IMPORTANT
!
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.
