JL Audio 98407 - User Manual

Thank you for purchasing a JL Audio amplifier for

your sound system.

Your amplifier has been designed and manufactured to exacting

standards in order to ensure years of musical enjoyment. For maximum

performance, we highly recommend that you have

your new amplifier installed by an authorized JL Audio dealer. Your

authorized dealer has the training, expertise and installation equipment

to ensure optimum performance from this product. Should you

decide to install the amplifier yourself, please take the time

to read this manual thoroughly to familiarize yourself

with its installation requirements and setup procedures.

If you have any questions regarding the instructions in this

manual or any aspect of your amplifier’s operation, please contact your

authorized JL Audio dealer for assistance. If you need further assistance,

please call the JL Audio Technical Support Department

at [email protected] or call (954) 443–1100 during business hours.

OWNER’S MANUAL

500W Wide-Range Class D Monoblock Amplifier

What’s Included

(1) Amplifier

(4) Stainless steel mounting screws

(1) User manual

Product Description

This is a wide-range monoblock amplifier utilizing Class D technology that can

be used alone or in stereo pairs.

Installation Applications

This amplifier is designed for operation with 12 volt, negative-ground electrical

systems. Using this product in systems with positive ground and/or voltages

other than 12V may result in damage to the product and will void the warranty.

This product is not certified or approved for use in aircraft.

Safety Considerations

• Whenever possible, mount the amplifier in a dry, well-ventilated location

that does not interfere with other factory installed electronic devices. If a dry

environment is not available, a location that is not exposed to heavy splashing

may be used.

• While this amplifier is designed to be water-resistant, it should never be

submerged under water or subjected to high-pressure water spray.

Do not install where it will be directly exposed to the elements.

• Do not mount the amplifier in the engine compartment or in any areas of

extreme heat.

• Securely mount the amplifier so that it does not come loose in the

event of a collision/sudden jolt or as a result of repeated vibrations during

normal operation.

• Check before drilling to make sure that you will not be drilling into an exterior

panel/hull, fuel tank, gas/brake line, wiring harness, or other vital system.

• Do not run system wiring outside or underneath the vehicle/vessel. This is an

extremely dangerous practice, which can result in severe damage/injury.

• Protect all system wires from sharp edges (metal, fiberglass, etc.) by

carefully routing them, tying them down and using grommets and loom

where appropriate.

• Secure all wiring as needed, using cable ties or wire clamps to protect them

from moving parts and sharp edges.

Installation Procedure/Connections

1.

Disconnect the NEGATIVE battery post connection and secure the discon-

nected cable to prevent accidental reconnection during installation. This is

an essential safety precaution during installation!

2.

Connect the RED power lead to the positive (+12V) battery post. 4 AWG is

the minimum power wire size for this amplifier.

3.

An appropriate fuse (sold separately), such as the JL Audio Water-Resistant

Master MAXI™ Fuse Block (XD-MFBW-MAXI), at the main power wire(s) to

the amplifier(s) is vital for vehicle/vessel safety. This fuse must be installed

within 18 inches (45 cm) of the positive battery post connection. If this is

the only device connected to this main wire, use a 50A fuse. Do not install

the fuse until the power wire has been securely connected to the amplifier.

4.

Connect the BLACK negative ground lead to a clean, solid metal grounding

point near the amplifier. This can be to metal chassis ground, if available. If

no metal chassis ground is available, it may be necessary to make this con-

nection to the NEGATIVE battery post. 4 AWG is the minimum ground wire

size for this amplifier. All ground connections (source unit and amplifi-

ers) should be made at the same location.

5.

Connect the BLUE remote turn-on lead to the source unit’s positive (+12V)

remote turn-on output. If your source unit does not have a dedicated

remote turn-on output, the amplifier’s turn-on lead can be connected to

+12V via a switch that derives power from an ignition-switched circuit.

6.

Signal Input (Low-Level): Connect the amplifier’s RCA input jacks to the

source unit’s preamp level output jacks. You may run a stereo or a mono

signal into the inputs of the amplifier. The amplifier’s input section automat-

ically sums stereo signals to mono for the internal amplifier section. When

feeding a single, low-level RCA input connection, use a Y-adaptor splitter to

split the mono signal and connect it to both Left and Right RCA inputs.

7.

Signal Input (Hi-Level): If your source unit does not offer preamp level signal

outputs, you can splice the speaker

output wires of the source unit onto a

pair of RCA plugs for the input pair or use the JL Audio ECS Speaker Wire

to RCA adaptor (XD-CLRAIC2-SW). Make sure to observe correct polarity in

making “Hi-Level Input” connections. Failure to do so will result in a loss of

signal (poor performance).

8.

Connect the speaker output leads to the corresponding speaker wires.

9.

Make necessary adjustments to the filter controls and input sensitivity.

10.

The amplifier’s subwoofer output level can be controlled from the front of

the

vehicle/vessel with an optional remote level controller (sold separately)

.

Use the RBC-1 for standard (dry) installations or the M-RBC-1 for applica-

tions exposed to moisture. Connect the remote’s plug to the amplifier’s har-

ness-mounted RJ11 input jack. (Refer to Appendix B)

WARNING! Failure to make safe, tight, high-integrity power connec-

tions can result in fire and extensive damage!

Control Panel Settings and Adjustments

The amplifier’s settings and controls are located on the bottom panel beneath a

gasketed, protective cover. Remove the four Phillips head screws from the center

panel to access the controls and make adjustments. Replace cover when finished

and mount the amplifier.

IPX6

WATER

RESISTANT

Label

Wire Color

Description

+12V

Red

Positive (+12V) Power Connection

GND

Black

Negative (GND) Ground Connection

REM

Blue

Positive (+12V) Remote Turn-On Input

SPK+

Lt. Blue

Positive (+) Speaker Output

SPK–

Lt. Blue/Black

Negative (–) Speaker Output

Plug

Description

White RCA

Left Channel Signal Input

Red RCA

Right Channel Signal Input

Remote Bass Control Jack

RJ11 Input Jack for M-RBC-1 (sold separately)

Connections

Switch

Setting

Mode / Function

Input Voltage

Low

RCA/Preamp Level Range

(250 mV - 4 V)

High

RCA/Preamp or Speaker Level R

ange (580 mV - 14 V)

Input Sens.

Variable

Adjusts the input stage of the amplifier channels to

match the source unit’s output voltage for maximum

clean output (refer to Appendix A)

LP Filter

Off

Full-Range Operation of Input Signals /

Defeats

M-RBC-1

& Infrasonic Filter

On

Low-Pass: Configures Filter to Attenuate Frequencies

ABOVE the Selected Filter Frequency

LP Filter

Freq.

Variable

Adjusts the low-pass filter cutoff frequency,

variable from 40-400 Hz, 24 dB/Octave

Infrasonic

Filter

Variable

Adjusts the high-pass filter cutoff frequency,

variable from 20-40 Hz, 12 dB/Octave

Bass Boost

Variable

Boost-Only Bass Equalizer: Boost range from 0dB

(full-counterclockwise) to +12dB (full-clockwise),

centered at 43 Hz. (always active)

Output

Polarity

0

Normal speaker polarity

180 deg.

Polarity reversed 180 degrees

S p e a k e r

M - R B C - 1 ( S o l d S e p a r a t e l y )

High

<or>

Low-Level Inputs

(selectable via

Input Voltage Switch

)

B a t t e r y

Remote Bass Control Jack

Fuse

(not included)

R e m o t e Tu r n - O n

S o u r c e

[ R E M ]

[ S P K– ]

[ S P K + ]

[ +12V]

[ G N D ]