Jbl LSR6328P, LSR6312SP, LSR6332 User Manual
LSR6300 Studio Monitors
Owner’s Manual
Important Safety Instructions
2
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN!
DO NOT EXPOSE
TO RAIN OR MOISTURE!
ATTENTION
RISQUE DE CHOC ÉLECTRIQUE
NE PAS ENLEVER!
NE PAS EXPOSER Á
LA PLUIE NI Á L'HUMIDITÉ!
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
products 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 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.
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 fixtures.
6. Cleaning - Do not use any solvent based cleaners on the finish. 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.
8. Grounding and Power Cords - Protect the power cord from being
walked-on or pinched, particularly at the plug’s convenience recepticle 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 fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
All powered products are fitted with a detachable power cord
(supplied) which connects to the chassis AC connector. The power
cord has an IEC female connector on one end and a male mains connector on the other end. This cord is supplied specifically to accommodate the different safety and electrical code requirements of individual countries. If you are traveling abroad with your system, test the
power mains and be aware of any specific voltage requirements
before operating your system.
9. Options - Only use attachments or accessories specified by JBL
Professional.
10. Wall or Ceiling Mounting - The appliance should be mounted on a
wall or ceiling only as recommended by the manufacturer. Caution:
Unsafe mounting or overhead suspension of any heavy load can result
in serious injury and equipment damage. Mounting of speakers should
be done by qualified persons in accordance with all applicable local
safety and construction standards. Be certain to follow the instructions
provided by the manufacturer of the mounting bracket. Before selecting a mounting bracket, be certain that it is capable of supporting the
weight of the speaker to be mounted.
11. Non-use Periods - Unplug this apparatus during lightning storms or
when it will be unused for long periods of time.
12. Servicing - Refer all servicing to qualified 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.
13. 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.
14. Fire - No naked flame sources, such as lighted candles, should be
placed on the surface, of the apparatus.
15. Coupler - The appliance coupler is used as the disconnect device, and
the appliance coupler shall remain readily operable.
The information contained in this document is confidential and the
copyright of JBL Professional. To convey its contents, in part of it
whole, to any party without prior written authorization is a violation of
the copyright. © JBL Professional 2003
Table Of Contents
3
Introduction 4
Getting Started 5
Unpacking 5
Placement 5
Power Connections
6
Making Sound 6
LSR6328P Biamplified Studio Monitor System 7 - 9
Audio Connections 7
AC Power Connections
8
Audio Level Adjustment
8
Low Frequency Adjustment 8
High Frequency Adjustment
9
LED Indication 9
RMC Equalization 9
LSR6332 Studio Monitor System
10 - 11
Audio Connections 10
High Frequency Adjustment
10
Changing Mid/High Orientation
11
LSR6312SP Powered Studio Subwoofer System 12 - 15
Audio Connections
12
AC Power Connections 13-14
Audio Level Adjustment 14
Low Frequency Adjustment
14
LED Indication 14
RMC Equalization 14
System Configuration 15
Appendix 16 - 18
A. Wiring Requirements 16 - 17
B. Mounting Specifications 18
C. RMC™ Room Mode Correction System Specifications 18
Specifications 19 - 21
LSR6328P 19
LSR6332 20
LSR6312SP 21
Warranty Statement 23
JBL Professional Contact Information 24
Introduction
4
Congratulation on your purchase of LSR6300 Studio Monitors. All LSR6300 models incorporate proprietary and patented JBL transducer
and network technologies., to provide ultra-accurate response, and exceptional SPL capability. Because production rooms are acoustically less-than-perfect, JBL has incoporated technologies in the LSR6300 Studio Monitors to overcome problems in the room. The
result: clear accurate sound at the listening position in any room.
LSR6300 Features to Overcome the Problems in the Room
LSR - Linear Spatial Reference T
echnology
JBL developed Linear Spatial Reference Technology to improve mid and high frequency accuracy at the listening position where reflected sound comes into play. By meeting frequency response criteria for seventy-two off-axis measurements, the LSR6300 Studio
Monitors ensure that not just the direct sound, but the reflected sound that reaches you at the listening position is also smooth and
accurate.
RMC™ - Room Mode Correction
The LSR6328P and LSR6312SP Subwoofer are equipped with RMC - JBL’s method of zeroing out bass problems at the listening position caused by room modes. The LSR6332 Studio Monitor and other speakers enjoy the benefits of RMC when used in a system with
the LSR6312SP Subwoofer. The RMC Calibration Kit* gives you everything you need to tune your LSR system and compensate for the
room modes in the listening environment.
*Included with the LSR6312SP, Optional accessory for the LSR6328P
Boundar
y Compensation
LSR6328P and LSR6312SP boundary compensation presets restore accurate bass response when the loudspeakers are wall mounted
or positioned close to walls, corners and placed on work surfaces.
Mounting Options
LSR6300 enclosures are reinforced to make them safe for mounting and mounting points are provided for use with readily available,
industry-standard mounting brackets.
THX® pm3
™
All LSR6300 models are THX
®
pm3™ approved for use in the most demanding production applications and environments.
JBL Transducer Technologies
Differential Drive
®
New voice coils and motor assemblies have two separate drive coils with twice the thermal surface area of traditional speakers. This
enables LSR6300 systems to provide higher peak output with less power compression, greater heat dissipation and a flatter impedance
curve at higher frequencies. By reducing the thermal related effects, the LSR6300 Studio Monitors sound the same at low, medium or
high levels.
Linear Dynamics Aperture™
Contoured ports virtually eliminate high-end turbulence found in traditional port designs. This provides more accurate low frequency
performance at higher output levels.
Dynamic Braking
All LSR6300 low frequency transducers are equipped with an electromagnetic braking voice coil to reduce the effects of extreme excursion with high transient program materials.
Titanium Composite High-Frequency Device
Using patented technology, the high frequency device incorporates titanium and composite materials to improve transient response and
reduce distortion. By reducing distortion in the lower operating range, where the ear is most sensitive, ear fatigue is radically reduced.
Elliptical Oblate Spheroidal (EOS) Waveguide
Designed for a targeted listening window of ±30º horizontally and ±15º vertically, the EOS waveguide provides a frequency response
through the entire window of 1.5 dB from on-axis response. This allows listeners at a distance from the speakers and even far off-axis
to hear an accurate representation of the on-axis response.
Neodymium Midrange with Kevlar™ Cone
A 2” neodymium motor structure is used in the LSR6332 for high excursion capability with an intentionally low crossover point of 250
Hz. This improves the spatial response of the system, which is crucial for accurate reproduction.
5
Getting Started
Unpacking:
When removing the systems from their packaging, it is important not to grasp the units from the front. Because the high frequency
device is located near the top of the cabinet on the front baffle, a stray hand or finger can cause damage. The best way to safely
unpack your monitors is to open the top of the box, keep the cardboard filler piece on, and roll the box upside down. The box can then
be slipped off. This also works in reverse for repacking the units.
Placement:
The design of the LSR6300 systems lend themselves to a wide variety of placement options. Covered here is a typical stereo setup for
near to mid field monitoring. A more detailed discussion of multi-channel sound system placement is available from JBL in Tech Note
Volume 3, Number 3.
Listening Distance: The common listening position at mixing postions is generally 1 to 1.5 meters (3 to 5 feet) for near field applications.
For mid-field applications, 2 to 3 meters is more likely. The stereo listening angle is largely a matter of personal preference, and we
suggest the angle of the loudspeakers should be between 35 and 50 degrees, as shown in Figure A.
Vertical vs. Horizontal Placement:
The LSR6328P model is designed to be positioned vertically. This orientation eliminates the phase
shifts that occur when the relative distances between the woofer, tweeter and the listening position are altered. The high frequency
waveguide is designed to provide optimum dispersion when the system is placed vertically. Placing the system horizontally will defeat
the LSR principles and cause destructive reflection off the work surface.
The LSR6332 is normally used in the horizontal position. This provides the lowest elevation to maximize sight lines and reduce shadowing of soffit mount monitors. In applications where vertical orientation is desired, the entire mid and high assembly can be rotated 90°
to a vertical line array position, as shown below in Figure B:
Figure A
Figure B
35-50˚
35-50˚
35-50˚
Getting Started
6
The LSR6312SP can be placed in either a vertical or horizontal orientation. More important than orientation is the physical position in
the room.
Angling toward the listening position:
The LSR6300-Series monitors should be angled to directly face the listener. The center of the high
frequency transducer should be on-axis with the ear level of the listener. Ideally, full-range speakers should be placed on suitable
speaker stands away from boundaries. The LSR6312SP Subwoofer can be located on the floor with its woofer cone on the same plane
as the woofer cones of the full-range speakers. Alternately, the Subwoofer performance can benefit from placement close to a wall or
corner. LSR6328P and LSR6312SP models include Boundary Compensation settings when speakers are placed in close proximity to
walls, corners and work surfaces.
Audio Connections
Refer to individual model-specific instructions.
Power Connections
The LSR6328P can be used with multiple AC supply voltages around the world. It will automatically adjust for operation from 100 to
240 VAC with no intervention by the user. The ground terminal of the IEC plug is required by wiring codes and regulations. It must
always be connected to the electrical installation safety ground. The LSR6300-Series units have carefully designed internal grounding
and balanced inputs and outputs to reduce the possibility of ground loops (hum). If hum occurs, see Appendix B for suggested audio
signal wiring, system grounding hints and other preventive measures. The LSR6312SP is set at the factory for use with either 100V125V or 200V-250V. Voltage is not field selectable.
Making Sound
After connections are made, the next step is to power up all equipment before powering up active LSR6300 speakers and external
amplifiers. Reduce the level of the monitor outputs of your console or preamp to minimum and turn on the powered speakers and the
amplifiers. There is a small delay with the power-up of the LSR6328P and LSR6312SP to accommodate for clicks and thumps from
upstream equipment. When the Green LED on the front panel turns on, the units are ready to go. Slowly advance the gain of the console
to feed the monitoring system to suitable listening level, and enjoy.
Figure C
7
LSR6328P Biamplified Studio Monitor System
The LSR6328P Bi-amplified Studio Monitor sets the standard for exceptional performance in near field design.
With a combination of advanced transducer engineering and powerful drive electronics, the LSR6328P meets the
professional’s requirement for accuracy and high dynamic range on the most demanding sessions.
The addition of JBL RMC™ Room Mode Correction circuit and boundary compesnation ensures accurate low frequency response at the listening position, free of the spectral shift caused by room modes and the effect of
boundaries.
The 8" woofer is based on JBL's patented Differential Drive®technology. With dual 1.5" drive coils, power compression is kept to a
minimum to reduce spectral shift as power levels increase. An added third coil between the drive coils acts as a dynamic brake to limit
excess excursion and reduces audible distortion at maximum levels. The cone is made of a carbon fiber composite forming a rigid piston and is supported by a soft butyl rubber surround.
The high frequency device is a 1" composite diaphragm integrated with an Elliptical Oblate Spheroidal (EOS) Waveguide with 100° by
60° dispersion, which is critical to the smooth spatial response required in today's working environments. The magnetically sheilding of
the HF transducer reduces interference when used in close proximity to CRT video and computer monitors. This custom power supply
eliminates all tonal-artifacts produced by the speaker when idling.
Audio Connections
LSR6328P Audio Connections:
The LSR6328P comes with a Neutrik "Combi" connector that accommodates either an XLR or 1/4" connector in either balanced or unbalanced configurations. The system has switchable input sensitivity: +4 dBu, +8 dBu, and -10 dBV.
These sensitivities are determined by adjusting the DIP switches according to the legend shown in Figure C. When the sensitivity is set
for, say, +4 dBu, an input signal equal to +4 dBu will produce a system output level of 96 dB SPL at a distance of one meter. Likewise,
settings of +8 dBu and -10 dBV will cause those input levels to attain the output acoustic level of 96 dB SPL.
An additional switch allows user-adjustable input sensitivity via a screwdriver control on the back panel. See Section 4 for additional
information on level control and gain matching. Positive voltage to Pin 2 of the XLR or the tip of the 1/4" jack will produce a forward
motion in the low frequency cone. Shown below in Figures C and D are views of the rear electronics panel on the LSR6328P and a signal flow diagram for the system. We recommend that you study these drawings in detail.
Figure D
AC Power Connections
The LSR6328P can accommodate power from 100 to 250 VAC 50/60 Hz by way of an autosensing power supply. This requires no attention on the part of the user.
The ground terminal of the IEC plug is required by wiring codes and regulations. It must always be connected to the electrical installation safety ground. The LSR6300 Series models have carefully designed internal grounding and balanced inputs and outputs to reduce
the possibility of ground loops (hum). If hum or buzz occur, see Appendix A for suggested correct audio signal wiring and system
grounding.
Audio Level Adjustment
The audio level sensitivity of the LSR6328P can be adjusted for almost any situation. Monitor outputs of consoles and work stations are
normally at a nominal level of +4 dBu or -10 dBV.
The LSR6328P can be set up for fixed or variable gain. As shipped from the factory, a nominal signal input of -10 dBV (0.3 volts) will
produce an output of 94 dB SPL at 1 meter in an anechoic environment. This allows the user to get a good match when using either
professional or semiprofessional equipment. Using the DIP switches on the back as shown below in Figure E, the system can be set for
+4 dBu, +8 dBu or +12 dBu sensitivity.
Switch 1 enables the Trim Control. With the switch in the down position, the Trim Control is out of the circuit and does not affect the
input sensitivity. In the up position, the input trim is added to the circuit and will attenuate the input level from 0 - 13 dB relative to
nominal.
• Switch 2 lowers the input sensitivity to +4 dBu sensitivity when in the up position.
• Switch 3 lowers the input sensitivity to +8 dBu sensitivity when in the up position.
• Switches 2 and 3 in the up position lower input sensitivity to +12 dBu.
Low Frequency Adjustment
The low frequency response of the LSR6328P can be adjusted to increase or reduce the low frequency output level. With all bass
adjustment switches off, the unit is set to a 36 dB/octave roll-off with a maximally flat characteristic.
Switch 4 - VLF, Very Low Frequency Protect:
Switch 4 changes the low frequency roll-off to a 24 dB/octave slope, which extends the low
frequency capability, while slightly reducing maximum sound pressure level. This is useful for spotting subsonic signals that could otherwise go undetected. For example, extreme low frequency rumble will be visible as a pronounced "fluttering" motion of the woofer cone.
To protect the low frequency transducer, normally switch 4 is set to Off.
8
LSR6328P Biamplified Studio Monitor System
Figure E
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