JL Audio J2500.1 “PREAmP OUTPUTS”, “Preamp Outputs”, REMOTE LEVEL Control, Speaker Output

“PREAmP OUTPUTS”

The J2-500.1 incorporates a preamp output section, designed to make multiple amplifier systems easy to set up. This section consists of a pair of RCA-type jacks marked

“Preamp Outputs”.

Preamp

Outputs

LEFT

REMOTE LEVEL Control

The J2-500.1 includes a remote level control that can be mounted in the front of the vehicle. This control allows the owner to adjust the overall subwoofer level to taste. To connect the remote bass control knob, insert its plug into the jack labeled “Remote Level Port” on the amplifier and route the cable and control to the desired location in the front of the vehicle.

SPEAKER OUTPUT

Speaker connection to the J2-500.1 is straightforward and takes place at the far right of the power/speaker connection panel. A single positive (“+”) connection and a single negative (“–”) connection are available via a connector labeled “Speaker Output (Mono)”.

“POWER” INDICATOR LED / Protection Circuitry

The multi-color “Power” LED on the J2-500.1also serves as a status indicator for certain fault conditions. Its operation is as follows:

1)Red: Amplifer is turning on.

2)Green: Amplifier is on / operating normally.

3)Yellow: Protection mode activated due to one

of the following: Shorted outputs, too low of a load impedance or thermal overload (too hot).

RIGHT

Remote

Level

Port

OP

40	130	Off +12dB
LP Filter Frequency (Hz)		Bass Boost

Once the fault condition is corrected, the amplifier will return to normal operating mode and the LED will turn green again. For information on troubleshooting this amplifier, refer to Appendix C (pages 12, 13).

The Preamp outputs deliver the same signal that is being fed to the inputs. (If the input signal are full-range, the preamp outputs will be full-range).This signal is not affected by the bass boost or LP FIlter processing selected for the amplifier.

“BASS BOost” Control

The J2-500.1 includes a single band, boost- only bass equalizer controlled by a rotary knob marked “Bass Boost”. This control has a boost range of 0dB (full-counterclockwise) to +12dB (full-clockwise) and is centered at 45 Hz.

Care should be taken to securely mount this control in a manner that does not interfere with vehicle operation.

When setting the amplifier’s input sensitivity, the Remote Level Control should be unplugged or at full clockwise rotation (maximum level).

Speaker loads below 2Ω nominal are not recommended and will cause the amplifier to enter into a protection mode.

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.

To connect the speaker wires to the amplifier, strip 1/2-inch (12 mm) of insulation from each speaker wire and insert them into their appropriate connector (observing correct polarity). Then, tighten each connector using a Phillips screwdriver.

Power

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

Off +12dB Bass Boost

Do NOT attempt to “bridge” two J2-500.1’s together 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.

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

8 JL Audio®

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