JBL MRX528S Professional Loudspeakers User Guide
- June 4, 2024
- JBL
Table of Contents
MRX528S Professional Loudspeakers
User Guide
M R X 512 M M R X 515
M R X 525 M R X 518 S
M R X 528 S
Explanation of Graphic Symbols
The exclamation point within an equilateral triangle is intended to alert
the users to the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the product.
The lightning flash with the arrowhead symbol, within an equilateral triangle, is to alert the user to the presence of insulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans.
CAUTION: TO REDUCE THE RISK OF ELECTRONIC SHOCK – DO NOT REMOVE THE
COVER. NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED PERSONNEL.
The IEC fuse symbol pictured at the left represents an approved user-
replaceable fuse. When replacing a fuse, make sure to replace it with only the
correct type and fuse rating.
Important Safety Instructions
- Read these instructions.
- Keep these instructions.
- Heed all warnings
- Follow all instructions
- Do not use this apparatus near water.
- Clean only with a dry cloth.
- Do not block any ventilation openings. Install in accordance with manufacturers’ instructions.
- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.
- Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type has two blades and a third grounding prong. The wide blade or the third prong is provided for your safety. If the provided plug does not fit your outlet, consult an electrician for the replacement of the obsolete outlet.
- Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit the apparatus.
- Only use attachments/accessories specified by the manufacturer.
- Use only with a cart, stand, bracket, or table specified by the manufacturer or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
- Unplug this apparatus during lightning storms or when unused for long periods of time.
- Refer all servicing to qualified service personnel. Servicing is required when an apparatus has been damaged in any way, such as the power cord or plug is damaged, liquid has been spilled, or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
- To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
BEFORE YOU BEGIN
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
MRX515 – 15¨ two-way, bass-reflex
MRX525 – Dual 15¨, two-way, bass-reflex
MRX528S – Dual 18¨ bass-reflex subwoofer
MRX518S – 18¨ bass-reflex subwoofer
Recommended Amplifier Power
| Recommended Amplifier Power| Infrasonic Filter Settings
---|---|---
Model| Full-Range / Parallel| HPF 24dB/octave
MRX512M MRX515 MRX525 MRX518S MRX528S| 800 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.
MRX500 SERIES BLOCK DIAGRAMS
MRX512M
*MRX512M: Input panels are located at either end of the enclosure.
MRX515
MRX518S
MRX525
MRX528S
BASIC CONFIGURATION
*MRX512M: The input panel has the same number of connectors, but is located at either end of the enclosure.
SUB/SAT WIRING
Speaker Cables
Minimum Wire Size for 0.5 dB Loss
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
8500 Balboa Boulevard
Northridge, CA 91329 USA
Part Number: 362053-001
Visit us online at www.jblpro.com