JL Audio 1000/1 User Manual

Page 6

performance in your system, listening in particular

to the mid-bass smoothness and impact to make

your determination.

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).

4) “Low V” (Blue): lights to indicate any dip in

supply voltage below 8 volts.The blue LED will

remain lit longer than the dip duration to better

alert the user to the problem. This will be

accompanied by a shutdown of the amplifier

(green LED will shut off) and a total loss of

output. Once the voltage rises above 9 volts,

the amplifier will turn itself on. Because voltage

dips occur in rapid succession, the typical behavior

will be a cycling of the amplifier on and off,

accompanied by flashing of the “Low V” blue LED.

If this is happening in your system, you will need to

investigate the cause of the voltage problem.This

could be a bad ground on the amplifier, battery or

alternator OR a faulty battery/charging system OR

a problem with a fuse holder or wire connection.

If you are unsure as to the cause of the problem,

please consult your JL Audio dealer or a qualified

automotive electrical specialist.

In marginal situations, a 1.0 Farad (or larger)

rapid-discharge capacitor connected in parallel to

the amplifier power connections may minimize

short-duration voltage dips in systems that are

having this problem.

Keep in mind that any large amplifier, like the

1000/1, places a very heavy demand on a vehicle’s

charging system when operated at its limits.Vehicles

with weak charging systems may need to be

serviced and/or upgraded to provide ample current

to a system including a 1000/1.

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

JL AUDIO 1000/1

SUBWOOFER OUTPUT

The 1000/1 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 (1000 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 1000/1 gives you the freedom to

use a variety of subwoofer configurations that

achieve final nominal impedances between

1.5 – 4

Ω (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.

If you connect a load higher than 4

Ω nominal

to the 1000/1, power will drop by half with every

doubling of impedance above 4

Ω. If you connect a

load lower than 1.5

Ω nominal to the 1000/1, 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.

Speaker loads below 1.5

Ω nominal are not

recommended and may cause the amplifier output

to distort excessively.

Speaker connections to the 1000/1 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

I M P O RTA N T

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 1000/1'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

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.

Do NOT attempt to “bridge” two 1000/1’s or

combine their output to a single load in any

manner. Doing so will damage the amplifier(s).

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.

OUTPUT POLARITY SWITCH

Depending on the distance relationship of the

mid-bass speakers and the subwoofers in a

system, it can be desirable to reverse the polarity

of the subwoofer system in order to produce a

better transition between subwoofer and mid-

bass speaker output.The “Output Polarity” switch

allows you to peform this polarity inversion

without removing any wires. Simply flip the switch

from the “Normal” to the “Reversed” position.

Experiment with this switch to determine which

polarity produces the best overall bass

I M P O RTA N T

JL AUDIO 1000/1