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BEFORE YOU BEGIN

JBL MRX528S Professional Loudspeakers

The MRX500 speakers covered by this manual are not intended for fixed installation in outdoor or high-moisture environments. Moisture can damage the speaker cone and surround and cause corrosion of electrical contacts and metal parts. Avoid exposing the speakers to direct moisture. Keep speakers out of extended or intense direct sunlight.  The driver suspension will prematurely dry out and finished surfaces may be degraded by long-term exposure to intense ultraviolet (UV) light.
MRX500 speakers can generate considerable energy. When placed on a slippery surface such as polished wood or linoleum, the speaker may move due to its acoustical energy output. Precautions should be taken to assure that the speaker does not fall off a stage or table on which it is placed.

Stand mounting safety precautions
Some MRX500 models include a 35 mm receptacle cup to allow mounting on tripod stands or on a pole over subwoofers. When using stands or poles, be sure to observe the  following precautions:

  • Check the stand or pole specification to be certain the device is designed to support the weight of the speaker. Observe all safety precautions specified by the manufacturer.
  • Always verify that the stand (or subwoofer/pole) is placed on a flat, level, and stable surface and be sure to fully extend the legs of tripod-type stands. Position the stand so that the legs do not present a trip hazard.
  • Route cables so that performers, the production crew, and the audience will not trip and topple the speakers over.
  • Inspect the stand (or pole and associated hardware) before each use and do not use equipment with worn, damaged, or missing parts.
  • Do not attempt to place more than one MRX500 speaker on a stand or pole.
  • Always be cautious in windy, outdoor conditions. It may be necessary to place an additional weight (i.e. sandbags) on the base of the stand to improve stability. Avoid attaching banners or similar items to any part of a speaker system. Such attachments could act as a sail and topple the system.
  • Unless you are confident that you can handle the weight of the speaker, ask another person to help you get it onto the tripod stand or pole.

Hearing damage, and prolonged exposure to excessive SPL
MRX500 loudspeakers are easily capable of generating sound pressure levels (SPL) sufficient to cause permanent hearing damage to performers, production crew, and audience members. Caution should be taken to avoid prolonged exposure to SPL in excess of 90 dB.

SPECIFICATIONS

MRX512M – 12¨, two-way, bass-reflex, utility/monitor speaker

JBL MRX528S Professional Loudspeakers - SPECIFICATIONS 1
JBL MRX528S Professional Loudspeakers - SPECIFICATIONS 2

MRX515 – 15¨ two-way, bass-reflex

MRX525 – Dual 15¨, two-way, bass-reflex

JBL MRX528S Professional Loudspeakers - SPECIFICATIONS 3

MRX528S – Dual 18¨ bass-reflex subwoofer

JBL MRX528S Professional Loudspeakers - SPECIFICATIONS 4

MRX518S – 18¨ bass-reflex subwoofer

JBL MRX528S Professional Loudspeakers - SPECIFICATIONS 5

Recommended Amplifier Power

Recommended Amplifier PowerInfrasonic Filter Settings
ModelFull-Range / ParallelHPF 24dB/octave
MRX512M MRX515 MRX525 MRX518S MRX528S800 to 1,600W@8Ω
800 to 1,600W@8Ω
1,600 to 3,200W@4Ω
1,000 to 2,000W@4Ω
2,000 to 4,000W@4Ω
63 Hz 50 Hz 40 Hz 31 Hz 31 Hz

Infrasonic Filter Settings
It is a good practice to use a High Pass Filter (HPF) to prevent frequencies below the system tuning frequency from reaching the speaker. Inputting these frequencies to the speaker will not result in any appreciable acoustic output but will put needless mechanical stress on the woofer and reduce available amplifier headroom. A High Pass Filter will protect your MRX500 system from excess infrasonic energy with little if any loss of significant program content. Refer to the above chart for infrasonic filter settings.

DuraFIexTM Finish

The DuraFlex finish used on your MRX500 series speakers is one of the most rugged finishes ever applied to a speaker. However, all speaker finishes are subject to damage. Should the DuraFlex finish require repair, a touch­up kit (Part Number 16677) is available from JBL Professional Parts.

Single Box On Pole Coverage

The dual angle pole socket on the MRX512M and MRX515 provides flexibility in aiming the speaker. As a gen­eral rule, the speaker should be positioned so that the audience cannot see the top or bottom panels of the speaker. When using stands or poles, be sure to observe the following precautions:

  • Check the stand or pole specification to be certain the device is designed to support the weight of the Observe all safety precautions specified by the manufacturer.
  • Be certain that the surface on which the system is to be stacked is flat, stable, and solid.
  • Route cables so that performers, the production crew, and the audience will not trip and topple the speakers.
  • Inspect the stand (or pole and assorted hardware) before each use and do not use equipment with worn, damaged or missing parts.
  • Always be cautious when deploying the system outdoors. Unexpected winds may topple a system. It may be necessary to place an additional weight (i.e. sandbags) on the base of the stand to improve Avoid attaching banners or similar items to any part of the speaker system. Such attachments could act as a sail and topple the system.
  • Unless you are confident that you can handle the weight of the speaker, ask another person to help you get it onto the stand or pole.
JBL MRX528S Professional Loudspeakers - Figure 1

MRX500 SERIES BLOCK DIAGRAMS

MRX512M

JBL MRX528S Professional Loudspeakers - Figure 2

*MRX512M: Input panels are located at either end of the enclosure.

MRX515

JBL MRX528S Professional Loudspeakers - Figure 3

MRX518S

JBL MRX528S Professional Loudspeakers - Figure 4

MRX525

JBL MRX528S Professional Loudspeakers - Figure 5

MRX528S

JBL MRX528S Professional Loudspeakers - Figure 6

BASIC CONFIGURATION

JBL MRX528S Professional Loudspeakers - Figure 7

*MRX512M: The input panel has the same number of connectors, but is located at either end of the enclosure.

SUB/SAT WIRING

JBL MRX528S Professional Loudspeakers - Figure 8

Speaker Cables

JBL MRX528S Professional Loudspeakers - Figure 9

Minimum Wire Size for 0.5 dB Loss

JBL MRX528S Professional Loudspeakers - Figure 10

JBL LIMITED WARRANTY

The JBL Limited Warranty on professional loudspeaker products (except for enclosures) remains in effect for five years from the date of the first consumer purchase. JBL  amplifiers are warranted for three years from the date of original purchase. Enclosures and all other JBL products are warranted for two years from the date of original purchase.

Who Is Protected by This Warranty?
Your JBL Warranty protects the original owner and all subsequent owners so long as: A.) Your JBL product has been purchased in the Continental United States, Hawaii or  Alaska. (This Warranty does not apply to JBL products purchased elsewhere except for purchases by military outlets.
Other purchasers should contact the local JBL distributor for warranty information.); and B.) The original dated bill of sale ispresented whenever warranty service is required.
What does the JBL Warranty cover?
Except as specified below, your JBL Warranty covers all defects in material and workmanship. The following are not covered: Damage caused by accident, misuse, abuse,  product modification or neglect; damage occurring during shipment; damage resulting from failure to follow instructions contained in your Instruction Manual; damage resulting from the performance of repairs by someone not authorized by JBL; claims based upon any misrepresentations by the seller; any JBL product on which the serial number has been defaced, modified or removed.
Who Pays for What?
JBL will pay all labor and material expenses for all repairs covered by this warranty. Please be sure to save the original shipping cartons because a charge will be made if  replacement cartons are requested. Payment of shipping charges is discussed in the next section of this warranty.
How to Obtain Warranty Performance
If your JBL product ever needs service, write or telephone us at JBL Incorporated (Attn: Customer Service Department), 8500 Balboa Boulevard, PO. Box 2200, Northridge,  California 91329 (818/893-8411). We may direct you to an authorized JBL Service Agency or ask you to send your unit to the factory for repair. Either way, you’ll need to  present the original bill of sale to establish the date of purchase. Please do not ship your JBL product to the factory without prior authorization. If transportation of your JBL  product presents any unusual difficulties, please advise us and we may make special arrangements with you. Otherwise,  you are responsible for transporting your product for repair or arranging for its transportation and for payment of any initial shipping charges.
However, we will pay the return shipping charges if repairs are covered by the warranty.
Limitation of Implied Warranties
ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSES, ARE LIMITED IN  DURATION TO THE LENGTH OF THIS WARRANTY. EXCLUSION OF CERTAIN DAMAGES JBL’S LIABILITY IS LIMITED TO THE REPAIR OR  REPLACEMENT, AT OUR OPTION, OF ANY DEFECTIVE PRODUCT AND SHALL NOT INCLUDE INCIDENTAL OR CONSEQUENTIAL DAMAGES OF  ANY KIND. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS AND/OR DO NOT ALLOW THE  EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS AND 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.

JBL PROFESSIONAL CONTACTS

Mailing Address:
JBL Professional
8500 Balboa Blvd.
Northridge, CA 91329
Shipping Address:
JBL Professional
8370 Balboa Blvd., Dock D
Northridge, CA 91329
(Do not return the product to this address without first obtaining prior authorization from JBL)
Customer Service:
Monday through Friday
8:00am – 5:00pm
Pacific Coast Time In the U.S.A.
(800) 8JBLPRO (800.852.5776)
www.jblproservice.com
On the World Wide Web:
www.jblpro.com

Outside the USA:
Contact the JBL Professional Distributor in your area. A complete list of JBL Professional international distributors is provided at our U.S.A.website – www.jblpro.com
Product Registration:
Register your product online at www.jblpro.com/registration

JBL MRX528S Professional Loudspeakers - icon 3

8500 Balboa Boulevard
Northridge, CA 91329 USA
Part Number: 362053-001
Visit us online at www.jblpro.com

Documents / Resources

JBL MRX528S Professional Loudspeakers [pdf] User Guide
MRX512M, MRX515, MRX525, MRX518S, MRX528S, Professional Loudspeakers, MRX528S Professional Loudspeakers, Loudspeakers

References

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