JBL LSR4312SP Manuale utente
LSR4312SP
Linear Spatial Reference
Powered Subwoofer
Owner’s Manual
ii
iii
Important
Safety Instructions
1. Read These Instructions - Before operating your new JBL product, please read safety and operating
instructions.
2. Keep These Instructions - For future reference and troubleshooting purposes, retain these instructions.
3. Heed All Warnings - All warnings in this manual should be followed.
4. Follow All Instructions
5. Water and Moisture - This product is intended for indoor use only. Do not use this apparatus near water or
plumbing fi xtures.
6. Cleaning - Do not use any solvent based cleaners on the fi nish. To clean enclosure, turn off speaker and
disconnect power cord then clean only with a lint-free cloth moistened with water.
7. Ventilation - Do not block any ventilation openings, including the Linear Dynamics Aperture Port on the
monitor systems. Install these products in accordance with manufacturers instructions. Do not install near any
heat sources such as radiators, heat registers, stoves or other apparatus that produce heat. Separate product
from surrounding materials and walls by 100 mm (4 in) or more on each side and top of product.
8. Grounding and Power Cords - Protect the power cord from being walked-on or pinched, particularly at the
plug’s convenience receptacle and the point where it connects to the apparatus. Do not defeat the safety
purpose of the grounding type plug. The power cord supplied with your powered product has a plug with 2
blades plus a 3rd grounding prong. Do not cut off or damage the grounding prong. If the provided plug does
not fi t into your outlet, consult an electrician for replacement of the obsolete outlet.
All powered products are fi tted with a detachable power cord (supplied) which connects to the chassis AC
connector. The speaker should be positioned such that the IEC power cord can be easily removed. The
power cord has an IEC female connector on one end and a male mains connector on the other end. This cord
is supplied specifi cally to accommodate the different safety and electrical code requirements of individual
countries. The model is designed to operate within a specifi ed voltage range and must not be connected to a
power source that does not conform to the specifi ed voltage range. If you are traveling abroad with your system,
confi rm the power mains supply the specifi ed voltage before connecting your equipment to the power mains.
9. Options - Only use attachments or accessories specifi ed by JBL Professional.
10. Non-use Periods - Unplug this apparatus during lightning storms or when it will be unused for long periods
of time.
11. Servicing - Refer all servicing to qualifi ed service personnel. Servicing is required when the apparatus does not
operate normally or has been damaged in any way, including: power supply cord or plug is damaged, water or
other liquid has been spilled or objects have fallen into the apparatus.
12. Carts and Stands - The appliance should be used only with carts or stands that are sturdy and well balanced.
All appliance and cart combinations should be moved with care. Quick stops, excessive force, and uneven
surfaces may cause the appliance and cart combination to overturn.
iv
13. Fire - No naked fl ame sources, such as lighted candles, should be placed on the surface, of the apparatus.
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 (ser-
vicing) instructions in the literature accompanying the product.
The lightning fl ash with the arrowhead symbol, within an equilateral
triangle, is to alert the user to the presence of insulated “dangerous
voltage” within the products enclosure that may be of suffi cient
magnitude to constitute a risk of electric shock to humans.
CAUTION: TO REDUCE THE RISK OF ELECTRONIC SHOCK - DO
NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED PERSONNEL. DO NOT EXPOSE
THIS APPARATUS TO RAIN OR MOISTURE.
ATTENTION: POUR EVITER LES RISQUES DE CHOC ELECTRIQUE,
NE PAS ENLEVER LE COUVERCLE. AUCUN ENTRETIEN DE
PIECES INTERIEURES PAR L’USAGER. CONFIER L’ENTRETIEN
AU PERSONNEL QUALIFIE. AVIS: POUR EVITER LES RISQUES
D’INCENDIE OU D’ELECTROCUTION, N’EXPOSEZ PAS CET
ARTICLE A LA PLUIE OU A L’HUMIDITE.
© 2006 Harman International Industries, Incorporated. All Rights Reserved.
Important Safety Instructions
v
Table Of Contents
Safety Instructions .......................................................................iii
Introduction ....................................................................................1
Quick Start .....................................................................................5
Reference .....................................................................................11
Front Panel ...........................................................................................11
Rear Panel ............................................................................................19
Remote Control ....................................................................................22
Subwoofer Placement and Polarity Setting ..........................................24
AC Power Connections ........................................................................25
Network Connections and DIP Switch Settings ...................................25
Audio Connections ...............................................................................28
Protection Circuitry in the LSR4312SP ................................................29
RMC™ Room Mode Correction ...........................................................32
Restoring Factory Settings ...................................................................33
LSR4300 Control Center Software .......................................................33
Appendix A: About Surround Sound ..........................................34
The LFE Channel ..................................................................................34
+10 dB Gain .........................................................................................34
Bass Management ................................................................................34
Appendix B: Using Two LSR4312SP Subwoofers .....................36
Appendix C: Using the LSR4312SP with Speakers
Other Than the LSR4328P / LSR4326P ......................................39
Appendix D: System Block Diagram ..........................................40
Appendix E: Wiring Requirements .............................................42
Appendix F: Error Messages and Troubleshooting ..................45
Appendix G: Important Information About LSR4300 Firmware .....47
Specifi cations ..............................................................................48
Warranty Statement ....................................................................50
JBL Professional Contact Information ......................................52
vi
v
1
Introduction
Congratulations on your purchase of the JBL LSR4312SP Linear Spatial Reference Powered Subwoofer.
We know that very few people read owner’s manuals from cover to cover, so we’ve organized this one to
make it easy to fi nd the information you need.
The Features section on the next page provides a brief overview of the exceptional features of the
LSR4312SP. It’s followed by a QuickStart section, which will get you up and running in a matter
of minutes.
Once you’ve got your LSR4312SP powered up and delivering sound, you should turn to the Reference
section, which describes every feature and function of the LSR4312SP in detail. Finally, we’ve included a
number of technical appendices and specifi cations at the end of this manual.
Note that this owner’s manual covers the model LSR4312SP subwoofer only. Separate documentation is
provided for the LSR4328P and LSR4326P model studio monitors and for the LSR4300 Control Center
software and is available for download at www.jblpro.com/lsr.
Manual Conventions
The following conventions will be used in this owner’s manual:
X Especially important tips and cautions will be presented like this.
Indicates that a button is lit.
Indicates that a button is blinking.
2
Indicates that an LED is lit green.
Indicates that an LED is lit red.
This owner’s manual assumes that your LSR4312SP subwoofer is being used in a networked system
consisting of one or more JBL LSR4328P and/or LSR4326P studio monitors. However, the LSR4312SP
can also be used with other speakers, although some of its most advanced features will not be functional.
See Appendix C on page 44 for a full description of how to use the LSR4312SP in a non-networked
system of speakers other than the LSR4328P / LSR4326P.
Features
Using a combination of JBL’s legendary expertise in acoustics and cutting-edge digital technology, the
LSR4312SP subwoofer has been designed to provide the all-important low frequency content of your mix
with accuracy and precision. Because it is capable of reproducing frequencies as low as 20Hz, it extends
the range of your system, and its many advanced features make it ideal for use in professional music,
postproduction, and broadcast applications.
RMC™ Room Mode Correction
The biggest challenge for anyone producing audio is creating a mix that sounds great on all playback
systems. If you think of a monitoring system as a kind of “lens” through which you hear sound, the
object is to have the lens be crystal-clear and transparent so that it imparts no coloration whatsoever
to the signal being played back. However, every loudspeaker system, no matter how well designed,
interacts with the room in which it is installed. Lack of correct acoustic treatment (or, worse yet, lack of
any treatment at all) can result in anomalies such as resonant frequencies and low-frequency “standing
waves” – the aural equivalent to the lens being “smeared.” Trying to create a mix in such an environment
can be as frustrating and diffi cult as trying to paint a masterpiece while blindfolded.
JBL’s exclusive second generation RMC™ Room Mode Correction technology is designed to solve
the problem. A powerful onboard computer in each LSR4300 loudspeaker and LSR4312SP subwoofer
automatically analyzes the frequency response of your room and compensates for low frequency
inaccuracies in the listening space by precisely inserting fi lters so that all signals arrive at the mix position
with the intended frequency response. In effect, the LSR4300 Series goes “beyond accurate,” allowing
Introduction - Manual Conventions
3
you to eliminate the guess-work and create reliable mixes that translate to any environment. Additionally,
the RMC process automatically trims all speaker levels and, in the LSR4312SP, even sets the correct
polarity so as to compensate for variations in placement relative to the mix position, thus ensuring
balanced mixes that are neither bass-heavy nor bass-light.
HiQnet™ Networking
The LSR4300 Series incorporates the new Harman HiQnet™ protocol that networks up to eight studio
monitors and two subwoofers in a system and allows full control from the front panel, a wireless remote
control, or from a computer via a standard USB connection and LSR4300 Control Center Software.
With the push of a button or the click of a mouse, you can change the system level, choose from any of
three different inputs (one analog and two digital), solo individual speakers and subwoofers, and make
adjustments to various parameters such as bass management and LFE fi ltering. HiQnet™ networking also
allows bass management for the entire system to be turned on or off, again at the push of a single button
or click of the mouse. (See Appendix A on page 34 for more information.)
LSR Linear Spatial Reference Design
The LSR4312SP subwoofer employs the Linear Spatial Reference technology that has made the LSR4300
and LSR6300 Series of studio monitors so popular in recording, postproduction, and broadcast facilities
worldwide. It has been designed from the ground up to provide accurate in-room response in a wide
variety of acoustic spaces.
Surround Smart
The LSR4312SP subwoofer is ideal for surround sound production. Up to eight main speakers (any
combination of LSR4326 and LSR4328 models) and up to two LSR4312SP subwoofers can be easily
confi gured for LCRS, 5.1, 6.1, theatrical 7.1, and larger mixing and monitoring applications.
Once all LSR4300 monitors and subwoofers are positioned, RMC and HiQNet™ automatically calibrates
the entire system, setting relative volume and subwoofer polarity so that the sound from all channels is
properly balanced when it arrives at the mix position. The end result is precise balance regardless of each
speaker’s actual physical placement.
The ability to centrally control the volume of all speakers and selectively mute or solo them (via wireless
remote control or LSR4300 Control Center software) is particularly useful in surround sound applications
where the recording system does not provide a multi channel monitor volume control, or where adjustable
monitor volume is not available when using the mixing system’s digital outputs. Similarly, the ability to
remotely switch between three digital and analog input sources – all without having to leave the mix
position – enhances system capabilities by allowing you to monitor not only the main recording system,
but also any two additional connected sources such as DVD and CD players, multi channel processors
and encode/decode units. This alleviates the need to purchase additional outboard monitoring hardware.
In addition, a dedicated LFE (Low Frequency Effects) input and advanced onboard bass management
features (see Appendix A on page 34 in this manual), as well as the ability to switch bass management on
and off remotely, make the LSR4312SP the perfect subwoofer component for the production of surround
sound.
Introduction - Features
4
Selectable Inputs
The LSR4312SP subwoofer provides six discrete balanced analog XLR inputs (Left, Right, Center, Left
Surround, Right Surround, and LFE) with selectable +4dBU / -10dBv sensitivity, as well as balanced ¼-
inch inputs for the Left and Right channels. In addition, dual high-resolution 96 kHz stereo AES/EBU and
S/PDIF digital inputs are provided. This variety of inputs allows the LSR4312SP to be connected to a wide
range of devices, including digital workstations, CD players, DVD players, and multichannel processors.
What’s more, you can determine which input is to be monitored with the push of a button on either the
front panel or wireless remote or click of a mouse (via an attached computer and LSR4300 Control Center
software*).
Other Features
• 12-inch self-shielded transducer with neodymium motor structure, self-powered with 450 watts
of
internal amplifi cation, eliminating the need for external amplifi ers or speaker cabling.
• Ultra-low frequency response to 20Hz, measured in-room.
• Advanced front-panel user interface allows control of system functions such as volume, solo,
input selection, RMC initiation and bypass, bass management on/off, bass management crossover
and LFE lowpass fi lter selection, and brightness level of the meter and buttons.
• Front panel meters show continuous output levels in dBFS.
• Built-in side handles aid in the positioning of the LSR4312SP subwoofer.
Note:
* Use of the wireless remote control and LSR4300 Control Center Software requires that the LSR4312SP
subwoofer be used in a system with one or more LSR4328P or LSR4326P studio monitors.
Introduction - Features
Indice
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