PreOUTS, Status LED / Protection Circuitry

PreOUTS

The M600/1 incorporates a pass-through preamp output section, so that additional amplifiers can be easily added to the system. The preamp output delivers the same signal that is connected to the M600/1’s inputs.

The preamp output signal by any crossover filter selected (if the input signal is full-range, the preamp output will be full-range).

SUBWOOFER OUTPUTS

The M600/1 is designed to deliver power into subwoofer loads equal to or greater than 2 ohms.

The M600/1’s subwoofer outputs are designed to accept 16 AWG - 8 AWG wire. To connect the subwoofer wires to the amplifier, first back out the set screws on the top of the terminal block, 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 terminal block, 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.

Status LED / Protection Circuitry

There is a single multi-color LED on the top surface of the amplifier to indicate the amplifier’s operating status.



1) Flashing Green: amplifier is powering up,

audio output is muted.

2) Constant Green: amplifier is on and

functioning normally, audio output is active.

3) Constant Red: Indicates that the

amplifier has exceeded its safe operating

temperature, putting the amplifier into a

5)LED off / Amplifier Shuts Off Unexpectedly The only condition that will shut down

an undamaged M600/6 completely is if battery voltage or remote turn-on voltage drops below 10 volts. The “Status LED” will turn off when this occurs. The amplifier will turn back on when voltage climbs back above 11 volts. If this is happening in your system, have your charging system and power wiring inspected.

For more information on troubleshooting this amplifier, refer to Appendix D (pages 16, 17).

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

If you plan to use the “Preouts” to feed a stereo amplifier, you must connect a stereo signal to the input of the amplifier.

A mono signal into the amplifier will result in a mono signal out of the preamp output.

You will notice that there are two “+” positive connections and two “–” negative connections. This is to facilitate multiple subwoofer wiring.

The two positive and two negative connections are connected in parallel inside the amplifier They are not stereo outputs. Connecting two subwoofers, each to one set of positive and negative terminals, will result in a parallel subwoofer connection. If only connecting one pair of subwoofer wires, it is not necessary to use both sets of connections.

Subwoofer loads below 2 ohms nominal are not recommended and may cause the amplifier

to initiate a protection mode which reduces power output.

self-protection mode, which reduces the

peak power output of the amplifier. When its

temperature returns to a safe level, the red

light will return to green and the amplifier will

return to full-power operating mode.

4) Constant Amber (yellow): Indicates

that an over-current condition has occurred and is accompanied by a muting of the amplifier’s output. Because the muting behavior may be very short in duration, it may manifest itself as an audible, repetitive ticking noise in the output. Over-current conditions can be caused by a speaker impedance lower than the optimum load impedance range for the amplifier or a short- circuit in the speaker wiring. The latter can result from a short circuit between the positive and negative speaker wires or between either speaker wire and a power wire. The “Status LED” will remain amber for a few seconds, even if the over- current condition is of a very short duration.

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

10 JL Audio - M600/1 Owner’s Manual