JL Audio MX300/1 Handleiding

JL Audio Receiver MX300/1

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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 technical@jlaudio.com or call (954) 443–1100 during business hours.

OWNER’S MANUAL

300W Wide-Range Class D Monoblock Amplier

What’s Included

(1) Amplifier

(4) Stainless steel mounting screws

(1) Spare 30A fuse

(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. 8 AWG is

the minimum power wire size for this amplifier.

3. An appropriate fuse 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 30A 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. 8 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 Range (750 mV - 15 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

0Normal speaker polarity

180 deg. Polarity reversed 180 degrees

Speaker

M-RBC-1 (Sold Separately)

High Low-Level Inputs<or>

(selectable via )Input Voltage Switch

30A

Battery

Remote Bass Control Jack

Remote Turn-O n

Source

[REM]

[SPK–]

[SPK+]

[+12V]

[GND]

Limited Warranty – Amplifiers (USA)

JL Audio warrants this product to be free of defects in materials and

workmanship for a period of two (2) years from the original date of purchase.

This warranty is not transferrable and applies only to the original purchaser

from an authorized JL Audio dealer. Should service be necessary under this

warranty for any reason due to manufacturing defect or malfunction, JL

Audio will (at its discretion), repair or replace the defective product with new

or remanufactured product at no charge. Damage caused by the following is

not covered under warranty: accident, misuse, abuse, product modification or

neglect, failure to follow installation instructions, unauthorized repair attempts,

misrepresentations by the seller. This warranty does not cover incidental or

consequential damages and does not cover the cost of removing or reinstalling

the unit(s). Cosmetic damage due to accident or normal wear and tear is not

covered under warranty.

Warranty is void if the product’s serial number has been removed or defaced.

Any applicable implied warranties are limited in duration to the period of the

express warranty as provided herein beginning with the date of the original

purchase at retail, and no warranties, whether express or implied, shall apply

to this product thereafter. Some states do not allow limitations on implied

warranties, therefore these exclusions may not apply to you. This warranty gives

you specific legal rights, and you may also have other rights, which vary from

state to state.

If you need service on your JL AUDIO product:

All warranty returns should be sent to JL Audio ’s Amplifier Service Facility

freight-prepaid through an authorized JL Audio dealer and must be

accompanied by proof of purchase (a copy of the original sales receipt). Direct

returns from consumers or non-authorized dealers will be refused unless

specifically authorized by JL Audio with a valid return authorization number.

Warranty expiration on products returned without proof of purchase will be

determined from the manufacturing date code. Coverage may be invalidated

as this date is previous to purchase date. Non-defective items received will

be returned freight-collect. Customer is responsible for shipping charges and

insurance in sending the product to JL Audio. Freight damage on returns is not

covered under warranty.

For Service Information in the U.S.A. please call

JL Audio Customer Service:

(954) 443-1100

9:00 AM – 5:30 PM (Eastern Time Zone)

JL Audio, Inc.

10369 North Commerce Pkwy.

Miramar, FL 33025

(Do not send product for repair to this address)

International Warranties:

Products purchased outside the United States of America are covered only

by that country’s distributor and not by JL Audio, Inc.

Appendix A:

Input Sensitivity Level Setting

Following the directions below will allow the installer to adjust the input

sensitivity of each amplifier channel pair in just a few minutes using equipment

commonly available in installation bays.

Necessary Equipment

• Digital AC Voltmeter

• CD or file with a sine-wave test tone recorded at 0 dB reference level in the

frequency range to be amplified for that set of channels (50 Hz for subwoofer

channels, 1 kHz for a midrange application). Do not use attenuated test tones

(-10 dB, -20 dB, etc.).

The Nine-Step Procedure

1) Disconnect the speakers from the amplifier’s speaker output connec-

tors (you need only disconnect one speaker wire).

2) Turn off all processing (bass/treble, loudness, EQ, etc.) on the source

unit, processors (if used) and amplifier. Set the source unit’s fader con-

trol to center position and its subwoofer level control to 3/4 of maxi-

mum.

3) Turn the “Input Sens.” control all the way down.

4) Set the source unit volume to 3/4 of full volume. This will allow for rea-

sonable gain overlap with moderate clipping at full volume.

5) Using the chart on this page, determine the target voltage for input

sensitivity adjustment according to the nominal impedance of the

speaker system connected to the amplifier outputs.

6) Verify that you have disconnected the speakers before proceeding. Play

a track with an appropriate sine wave (within the frequency range to

be amplified) at 3/4 source unit volume.

7) Connect the AC voltmeter to the speaker output connectors of the

amplifier. Make sure you test the voltage at the correct connectors

(+ and –).

8) Increase the “Input Sens.” control until the target voltage is observed

with the voltmeter.

9) Once you have adjusted the amplifier to its maximum low-distortion

output level, reconnect the speaker(s) and listen to the system. The

“Input Sens.” controls can now be adjusted downward if the amplifier

requires attenuation to achieve the desired system balance.

Specications MX300/1

Rated RMS Power @

14.4V, <1% THD+N 160W x 1 @ 4 Ω 220W x 1 @ 3 Ω 300W x 1 @ 2 Ω

Rated RMS Power @

12.5V, <1% THD+N 160W x 1 @ 4 Ω 200W x 1 @ 3 Ω 250W x 1 @ 2 Ω

Frequency Response 20 Hz - 12 kHz (+0, -1dB), 7 Hz - 14 kHz (+0, -3dB)

S/N Ratio, A-weighted,

20 kHz noise bandwidth 85 dB (Referred to rated power), 64 dB (Referred to 1 W)

Damping Factor >150 / 50 Hz @ 4 Ω, >75 / 50 Hz @ 2 Ω

Input Voltage Range 250 mV - 4 V (Low) or 750 mV - 15 V (High)

Filter Modes Low-Pass, defeatable

Filter Freq. Range, Slope 40 - 400 Hz, 24 dB/Octave

Detented Filter Freq.

Potentiometers 40, 80, 130, 300 Hz (Calibrated)

Infrasonic Filter 20 - 40 Hz, 12 dB/Octave

Bass Boost EQ 0 to +12 dB @ 43 Hz

Output Polarity 0 or 180 degrees

Remote Bass Controller M-RBC-1 (sold separately)

Min Power/GND Wire 8 AWG

Fuse Rating 30 A

Dimensions 1.77 in x 8.66 in 3.09 in / 45 mm x 220 mm x 78.5 mm

Appendix B

Remote Level Control

With the optional RBC-1 or M-RBC-1 Remote Level Control (each sold separately),

you can control the subwoofer volume from the front of the vehicle/vessel.

The remote’s plug connects to the amplifier’s harness-mounted RJ11 input

jack. When connected to the amplifier, the Remote Level Control operates as

follows. At full counter-clockwise rotation, the audio will mute completely. At full

clockwise rotation the level will be the same as if the remote was not connected

at all. In other words, it operates strictly as a level attenuator. This control will

not affect the “Bass Boost” feature of the amplifier. Care should be taken to

securely mount this control in a manner that does not interfere with vehicle/

vessel operation. When setting the amplifier’s input sensitivity, the Remote Level

Control should be unplugged or at full clockwise rotation (maximum level).

Problem Possible Cause Solution

How to properly set

input sensitivity 

Please refer to Appendix A to set the

input sensitivity for maximum, low-

distortion output.

Amplifier doesn’t

turn on

Faulty fuse Remove fuse and check with continuity

meter. Replace if necessary.

Poor connection

integrity

Check “+12V”, “Ground”, and “Remote”

leads for pinched wires; ensure tight

connections.

Insufficient

“Remote” input

Make sure there is a sufficient +12V

supply at the “Remote” connection; if

not a relay may be required.

Intermittent output,

fluctuates when I tap

on it or hit a bump

Poor connection

integrity

Make sure insulation has been properly

stripped back at connection points for

good contact area.

Make sure input connectors are making

good contact with input jacks of the

amplifier.

Distorted, attenuated,

or popping sound

Faulty speaker

connection (Short

Circuit / Over

Current Protection)

Inspect speaker wires for possible short-

circuit, either together or shorted to the

vehicle’s chassis ground.

Check the nominal load impedance at

the amplifier is equal to or greater than

2 ohms.

Output shuts off after

a while

Overheating

condition (Thermal

Protection)

Make sure amplifier mounting area has

adequate space for ventilation and heat

dissipation.

Troubleshooting

MX300/1

Nom. Impedance Target AC Voltage

4Ω 25.3 V

3Ω 25.7 V

2Ω 24.5 V

Important!

Do not increase any “Input Sens.” setting for any amplifier channel or

channel pair in the system beyond the maximum level established during

this procedure. Doing so will result in audible distortion and possible

speaker damage.

It will be necessary to re-adjust the “Input Sens.” for the affected channels if any

equalizer boost is activated after setting the “Input Sens.” with this procedure. This

applies to any EQ boost circuit, including source unit tone controls or EQ circuits. EQ

cuts will not require re-adjustment.

Status LED’s / Protection Circuitry

There are two status indicator lights on the wiring end panel of the amplifier.

1. “POWER” (Green): Lights to indicate that the amplifier is turned on and

operating normally.

2. “PROTECT” (Red): Lights to indicate the amplifier’s protection circuitry

has been activated to prevent product failure due to thermal overload,

over current or short-circuit to the amplifier’s outputs. When this pro-

tection mode is activated, the amplifier will shut down to protect its

circuitry. When the problem is corrected, the amplifier will return to

normal operation and the “Protect” LED will shut off. Connecting the

speaker outputs to impedances lower than 2 ohms will also cause this

protection mode to activate.

POWER

(Green LED)

PROTECT

(Red LED) Status Note

ON OFF Normal Operation 

OFF ON Thermal Protection Lasts until temp cools to normal

OFF/ON ON/OFF Over Current Green/Red LEDs alternate for 1 second

OFF ON Short Circuit Possible audible “popping” noise

Product specificaties

Merk:	JL Audio
Categorie:	Receiver
Model:	MX300/1

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