JBL LSR6312SP User manual
LSR6325P
Bi-Amplified Studio Monitor System
Owner’s Manual
2
Important Safety Instructions
The IEC fuse symbol pictured at the left represents an approved, user replaceable fuse. When replacing a
fuse, make sure to replace with only the correct type and fuse rating.
1. Read lnstructions - Before operating your new JBL product, please read all 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 user manual should be followed.
4. Follow Instructions - By following instructions presented in this guide, you should be able to quickly
enjoy an accurate and safe monitoring system.
5. Water and Moisture - Do not use this apparatus near water or plumbing fixtures.
6. Cleaning - Clean with a lint-free cloth - Do not use any solvent based cleaners on the finish. A slightly
damp cloth can also be used on the enclosure surfaces and woofer surrounds.
7. Ventilation - Do not block any ventilation opening, 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 - The power cord supplied with your powered product has a 3-pin plug.
Do not cut off or damage the grounding pin. If the provided plug does not fit into your outlet, consult an
electrician for replacement of the obsolete outlet. Dress the power cords so that they will not be inadvertently
walked on or pinched, particularly at plugs, convenience receptacles and the points where they exit the ap-
paratus.
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 the manufacturer.
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 qualified service personnel. Servicing is required when the apparatus
does not work, or has been damaged in any way, including: damage to power cord or plug, water or other
liquid damage to the electronics, or damage due to falling or dropping.
12. Wall or Ceiling Mounting - The appliance should be mounted on a wall or ceiling only as recommend-
ed by the manufacturer. [See Pages 6 – 7]
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.
3
Explanation of Graphic Symbols
The exclamation point within an equilateral triangle is intended to alert the user 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 intended to
alert the user to the presence of insulated ‘’dangerous voltage” within the product’s enclo-
sure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE COVER.
NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED PERSONNEL.
ATTENTlON: POUR EVITER LES RISQUES DE CHOC
ELECTRIQUE, NE PAS ENLEVER LE COUVERCLE. AUCUN ENTRETIEN
DE PIECES INTERRIEURES 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.
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 2004
4
Table of Contents
Important Safety Instructions ................................................................................... 2-3
Table of Contents ........................................................................................................................ 4
Introduction
Front Panel Drawing ................................................................................................... 5
Rear Panel Drawing ................................................................................................... 6
LSR 6325 Features .................................................................................................... 5
Set-Up
Unpacking .................................................................................................................. 7
Placement .................................................................................................................. 6
Audio Connections ..................................................................................................... 7
AC Power Connections ............................................................................................... 7
Making Sound
Audio Level Adjustment .............................................................................................. 7
Frequency Response Adjustment ................................................................................ 8-9
80 Hz High Pass Filter ................................................................................................ 9
Boundary Compensation ............................................................................................ 9
LED Indication ............................................................................................................ 9
Mounting ................................................................................................................... 9-10
LSR6325P Systems with the LSR 6312SP Subwoofer ............................................................... 10
Specifications
System Specifications ................................................................................................ 11
Transducer Specifications .......................................................................................... 12
Performance Graphs .................................................................................................. 13
Appendix: Wiring Recommendations ......................................................................................... 14-15
Warranty Statement ................................................................................................................... 16
JBL Professional Contact Information ....................................................................................... 17
5
Introduction
Congratulations on your purchase of the LSR6325P Bi-Amplified Studio Monitor, the newest member of the
LSR6300 Series product line. The LSR6325P system incorporates patented JBL transducer and system
technologies designed to provide ultra-accurate response and exceptional SPL capability in a very compact
form-factor. THX® pm3™ approved for use in the most demanding production applications and environ-
ments, the LSR6325P is ideal for stereo and surround sound recording, post production, and broadcast sys-
tems where space is limited but accuracy and high-output are a requirement. Because production rooms are
acoustically less-than-perfect, JBL Professional has incorporated technologies in the LSR6325P to overcome
problems in the room. The result: clear accurate sound at the listening position in any room.
LSR6325 Features
5.25” Woofer with JBL Symmetrical Field Geometry (SFG) ® technology – Excursion is maximized by
using a massive 1.5” drive coil, while maintaining excellent distortion characteristics. The heavy magnetic
structure keeps power compression to a minimum reducing spectral shift as power levels increase. The
result is exceptional low frequency output and accurate spectral response at all listening levels.
1” Titanium Composite High Frequency Transducer – 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 +/- 15º verti-
cally, the EOS provides a frequency response through the entire window of 1.5 dB from on-axis response.
Di-cast aluminum enclosure – The rigid aluminum enclosure provides a high-inertial ground for optimum
transducer performance and low resonance.
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.
THX® pm3™ approved – The LSR6325P is THX approved for use in the most demanding production ap-
plications and environments
Balanced XLR and unbalanced RCA inputs – Allows connection of professional and consumer audio equip-
ment and computer recording workstations.
High Frequency Adjustment with three settings – allows you to tailor high frequency response to taste,
environmental conditions and program requirements.
80 Hz High Pass Filter – allows use with sub woofers without bass management.
Front-panel volume control – provides conveniently located volume adjustment in computer recording and
table-top production applications.
6
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7
LSR6325P Features to Tackle the Problems in the Room
LSR – Linear Spatial Reference Technology
JBL Developed Linear Spatial Reference Technology to optimize mid and high frequency accuracy at the
listening position where reflected sound comes into play. Meeting frequency response criteria for seventy-two
off-axis measurements, the LSR6325P ensures that not just the direct sound, but the reflected sound that
reaches you at the listening position is also smooth and accurate.
Boundary Compensation - A Boundary Compensation switch restores accurate bass response when the
loudspeaker is wall mounted, positioned close to walls, corners, placed on work surfaces or console meter
bridge.
Magnetic Shielding – The LSR6325P is magnetically shielded to allow use in close proximity to CRT video
and computer displays.
Mounting Options – The LSR6325P enclosure includes mounting points to provide flexibility and allow you to
optimize placement, particularly in small environments. Mounting points are compatible with industry-stan-
dard mounting hardware.
Optional LSR6312SP Subwoofer with Room Mode Correction - The use of an optional LSR6312SP
powered subwoofer in your LSR6325P system adds the powerful benefit of Room Mode Correction. The RMC
circuit in the LSR6312SP and the included RMC Calibration Kit allow you to identify and compensate for
troublesome low frequency standing waves. The result is clear extended bass response at the mix position in
any size room.
Set Up
Unpacking – Caution: The high-frequency transducer is unprotected and can be damaged if touched while
unpacking the speaker. An easy way to safely unpack your monitors is to open the top of the box, keep the
filler piece on and roll the box upside down. The box can then be slipped off. This also works in reverse for
repacking the system.
Placement – Speaker Placement
Listening Distance: In a stereo close-field application the speaker is typically placed 1 to 1.5 meters (3-5 feet)
from the listening position. In mid-field or surround sound applications, 2-3 meters is typical. The field in a
stereo listening application is optimized by arranging the speakers to form an equilateral triangle where the
distance between the two speakers equals the distance of each speaker to the listening position. Vertical vs.
Horizontal Placement: The LSR6325P system is designed for vertical orientation which provides broad lateral
dispersion and controlled vertical dispersion to optimize the size of the listening window and minimize reflec-
tions off the work surface and the ceiling. Horizontal placement will limit the size of the listening window and
increase reflections which can result in cancellation at high frequencies.
Angling towards the listening position: The LSR6325P should be angled so the center of the high frequency
transducer points directly at the listener’s ears.
8
Audio Connections
The LSR6325P includes one XLR and one RCA connector to accommodate a wide range of signal levels and
balanced or unbalanced configurations. The XLR input is nominal +4 dBu sensitivity and the RCA input is
-10 dBV. Variable user calibration is provided using the front panel volume control. Positive voltage applied
to pin 2 of the XLR or the pin of the RCA jack will produce a forward motion in the cone of the low frequency
transducer.
AC Power Connections
The LSR6325P has a power transformer which allow it to be used with multiple AC supply voltages around
the world. The LSR6325P will accept voltages from 100-120 or 200-240 Volts, 50-60 Hz when the voltage
setting and fuse is correct. The rating is visible in a small white window on the fuse holder. Before connect-
ing the system to the AC power, confirm that the switch setting on the rear of the unit is set to the proper
position and the fuse is the correct rating. (WHAT IS THE CORRECT FUSE VALUE FOR 110 AND 220? HOW DO
YOU REPLACE THE FUSE) The ground terminal of the IEC plug is required by wiring codes and regulations. It
must always be connected to the electrical installation and safety ground. The LSR6325P units have carefully
designed internal grounding and balanced inputs and outputs to reduce the possibility of ground loops which
cause hum. If hum occurs, see Appendix A for suggested audio signal wiring and system grounding.
Making Sound
After the audio and power connections are completed, the next step is to power-up. It is recommended
that you power all the equipment in the system prior to powering up the amplified LSR6325P monitors.
Alternately, if the speakers are ON, set the LSR6325P volume controls to their full counter clock-wise position
to produce minimum gain when powering up or powering down other components in the system. When the
Green LED on the front panel is illuminated, the speaker system is ready to go. Slowly advance gain of the
sound source and/or slowly increase the gain of the LSR6325P by turning the front panel volume control in
a clockwise direction and check for system noise. If everything is correct, advance the level of the sound
source, sit back and enjoy. If there is excessive hum, noise or no signal, see Appendix A for suggested wiring
practices.
Audio Level Adjustment
The audio level sensitivity of the LSR6325P can be adjusted to accommodate a wide range of applications.
Audio systems typically send signal with nominal level of either +4 dBu or -10 dBV. These are referred to as
professional and semi professional levels, respectively.
The nominal input level of the LSR6325P XLR input is +4 dBu and -10 dBV for the RCA input. A nominal level
to these inputs will produce an output of 96 dB SPL at a distance of 1 meter in an anechoic environment. This
allow the user to get a good match when using either professional or semi professional equipment. If less
sensitivity is needed the front panel volume control can be adjusted down. When set in the 12:00 position, the
front panel volume control attenuates the signal by 9 dB.
Frequency Response Adjustments
Four DIP switches located in a recess on the rear-panel of the LSR6325P allow the user to adjust frequency
response to compensate for placement, program material and personal preference. To activate the associated
switch function, set the switch in the UP position – so the switch is closer the JBL logo on the rear of the
speaker. The LSR6325P is shipped with all switches in the DOWN position so the switches are at the setting
farthest away from the JBL logo.
Rear Panel XLR and RCA Connectors
9
Switch 3 boosts the high frequency response by 1.5 dB above 2.3 kHz when set to the UP position. This posi-
tion can be used if the room is extremely dead, or you want to hear more high frequency from the speaker to
assist you in creating “warmer” mixes.
Switch 4 attenuates the high frequency response by 1.5 dB above 2.3 kHz when set in the UP position. This
position can be used if the room is highly refl ective or you want to hear less high frequency from the speaker
to allow you to mix “brighter,” apply more high frequency EQ or signal processing.
80 Hz High Pass Filter – Setting DIP switch 1 in the UP position activates a 80 Hz High-Pass fi lter. This fi lter
can be activated when LSR6325P is used with sub woofers that do not include bass management features.
Boundary Compensation – DIP Switch 2 can be used to restore accurate system performance when the
speaker is placed on a work-surface, or near wall or boundary. The setting is particularly useful when the
speaker will be positioned on a table-top and used with computer audio production system.
LED Indication – A single bi-color LED indicator is located on the front of the LSR6325P. In normal operation,
the LED will be illuminated GREEN. At the onset of amplifi er clipping in either the low or high frequency ampli-
fi er, the LED will fl ash RED. Continual RED illumination of this LED indicates that levels should be reduced.
Mounting – The LSR6325P has built-in mounting points for use with industry-standard mounting hardware.
The mounting points are located on the rear panel of the speaker system. The four threaded holes accept a
¼” diameter machine screw with a pitch of 20 threads per inch. The length of the screw should be a total of
5/8th inch plus the thickness of the mounting bracket.
Mounting Hole Pattern
10
Caution: Unsafe mounting or overhead suspension of any heavy load can result in serious injury and equip-
ment 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. Be certain that it is capable of supporting the weight of the speaker to be mounted.
LSR6325P Systems with the LSR6312SP Subwoofer
The addition of the LSR6312SP Subwoofer provides an exceptionally accurate system with bass extension
to 26 Hz, even greater SPL capability, and the extra benefit of JBL RMC™ Room Mode Correction. RMC is an
electronic system designed by JBL Professional and built into the subwoofer, which corrects low frequency
inaccuracies caused by room modes or standing waves in the listening environment. For more information
about RMC, visit the JBL Professional Web site at www.jblpro.com/LSR. Two system examples follow.
Note: LSR6325P 80 Hz High Pass Filter is OFF
Stereo System
5.1 Surround System
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