Handleiding JL Audio MX300 (pagina 2 van 2) (Engels)

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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) 4 43 -110 0

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

JL Audio MX300 Handleiding

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