JBL LSR2325P User manual
LSR2300 Series Studio Monitors
Owners Manual
LSR2325P
5" Two-Way Bi-Amplied
Studio Monitor
LSR23258P
8" Two-Way Bi-Amplied
Studio Monitor
LSR2310SP
10" Studio Subwoofer
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Section 2: Important Safety Instructions
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
ampliers) that produce heat.
9. 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 plug 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 t into your outlet, consult an electrician
for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and
the point where they exit from the apparatus.
11. Only use attachments/accessories specied by the manufacturer.
12. Use only with the cart, stand, tripod, bracket, or table specied 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.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualied service personnel. Servicing is required when the apparatus has been damaged
in any way, such as power supply 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.
15. The appliance coupler of the power supply cord is used as the ultimate disconnect device from the mains, The
appliance coupler shall remain readily operable.
16 The apparatus shell be connected to mains socket outlet with a protective earthing connection
Warning:
• To reduce the risk of re or electrical shock, do not expose the apparatus to rain or moisture.
• The apparatus shall not be exposed to dripping or slashing and no objects lled with liquids, such as vases,
shall be placed on the apparatus. As with any electronic product, use care not to spill liquids into any part of
the system. Liquids can cause a failure and/or a re hazard
Watch For These Symbols
The lightning ash with arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence
of uninsulated. “Dangerous Voltage” within the products
enclosure that may be of sufcient magnitude to constitute
a risk of electric shock to persons. 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.
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Contents
Important Safety Instructions........................................................................................3
Introduction ..................................................................................................................5
Setting Up Your System................................................................................................6
Unpacking ..............................................................................................................6
Placement ..............................................................................................................6
Audio Connections.................................................................................................7
Power Connections................................................................................................7
Making Sound ........................................................................................................7
LSR2328P, LSR2325P Bi-amplied Studio Monitors
Front and Rear Views ............................................................................................8
Input Panel.............................................................................................................9
Audio Connections.................................................................................................9
LSR2310SP Powered Studio Subwoofer
Front and Rear View ...........................................................................................10
Input Panel............................................................................................................11
Audio Connections................................................................................................11
Setting Subwoofer Level .....................................................................................12
Placement and Polarity ........................................................................................12
Crossover Settings and Bass Management.........................................................12
Surround Sound and .1 LFE Channel.................................................................. 12
Systems Connections - Stereo and Surround Sound Systems.................................. 13
Appendix A – Mounting of LSR2328P and LSR2325P ...............................................16
Appendix B – Trouble Shooting ..................................................................................17
Specications .............................................................................................................18
JBL Service Contact Information ................................................................................ 20
Product Warranty Information ....................................................................................21
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Section 1: Introduction
Congratulations on your purchase of LSR2300 Series Studio Monitors. The LSR2300 Series Studio Monitors meet
JBL’s high standards for accuracy and long term-reliability in demanding professional applications. All LSR2300
models incorporate JBL professional transducer and network technologies to provide accurate frequency response,
exceptional low frequency extension and high SPL capability. JBL LSR Linear Spatial Reference design ensures
greater accuracy at the mix position in a broad range production rooms. Additionally, each speaker is equipped to
integrate into professional production systems and work environments.
JBL LSR Linear Spatial Reference Design
Because listening environments vary, JBL designed the LSR2300 system using LSR Linear Spatial Reference
Because listening environments vary, JBL designed the LSR2300 system using LSR Linear Spatial Reference
design criteria that improves accuracy at the listening position in a broad range of rooms. The key to accuracy is
ensuring not just the on-axis sound, but also the reected sound that reaching the mix position is neutral. While
most manufacturers take only a single on-axis measurement of the speaker’s performance, Linear Spatial
Reference design criteria requires 72 measurements, 360 degrees around the speaker, yielding more than
1,200 times more data. This data is used in the design of critical system components, enabling JBL to engineer
complete systems that deliver smooth off-axis response. The result: clear accurate sound at the listening
position in any room.
The LSR2300 Series includes a range of features to meet the needs of demanding audio production
applications.
• LSR2300 low frequency magnetically-shielded transducers are equipped with 1.5" (LSR2328P and
LSR2325P) and 2.0" (LSR2310SP) voice coils with robust motor structures to provide excellent low
frequency performance. By reducing thermal-related effects, the LSR2300 Studio Monitors sound the
same at low, medium and high levels. The woofers are magnetically shielded to prevent interference with
magnetically sensitive displays and equipment.
• All models are internally amplied with high-output Class A-B monolithic power ampliers to provide high
SPL (Sound Pressure Level) for demanding production applications.
• The soft dome magnetically-shielded High-Frequency Transducer in the LSR2325P and LSR2328P
incorporates optimally damped materials to improve transient response and minimize distortion. By
reducing distortion in the lower operating range, where the ear is most sensitive, ear fatigue is reduced.
• A JBL Elliptical Oblate Spheroidal (EOS) Waveguide is precisely engineered to achieve smooth mid and
high frequency response for a targeted listening window of ±30º horizontally and ±15º vertically. This
provides greater accuracy at the mix position where the blend of on-axis and reected off-axis sound is
critical. The Elliptical High Frequency Aperture around the tweeter optimizes high frequency coverage for
smoother in-room response above 9kHz
• The LSR2300 series models include balanced XLR, 1/4" and unbalanced RCA connectors, and a variable
level attenuator to allow interface to a broad range of signal sources.
• High Frequency and Low Frequency Trim controls in the LSR2328P and LSR2325P allow adjustment
of frequency response to preference, or to compensate for acoustically reective or absorptive listening
environments.
• LSR2328P and LSR2325P have integrated mounting points and reinforced enclosures to allow safe wall
mounting using readily available, industry-standard mounting brackets.
• The LSR2310SP Subwoofer incorporates a professional bass management system with selectable cross-
over settings to optimize low frequency performance in a range of production environments.
• When added to your LSR2300 System, the optional JBL MSC1 Monitor System Controller provides control
of your system and JBL RMC™ Room Mode Correction – JBL’s ingenius technology that measures and
automatically compensates for the effect of low frequency room modes at the mix position that have
plagued mix engineers. More information about the JBL MSC1 Monitor System Controller is available at
on the JBL Professional Website
To get the most out of your JBL LSR2300 system, please review this owner’s manual and keep it on hand for
future reference. Also, please register your new speakers at www.jblpro.com/registration .
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Section 3: Setting Up Your System
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 bafe, a stray hand or nger can cause
damage. The best way to safely unpack your monitors is to open the top of the box, keep the foam end-cap 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
IThe LSR2328P and LSR2325P models are designed to be positioned vertically to allow the woofer and the tweeter to
be in vertical alignment. This orientation eliminates phase shift that occurs when the distance of the woofer to the ear
is a different from the distance of the tweeter to the ear. Also, the tweeter waveguide is designed to provide optimum
dispersion when the system is vertically oriented. Placing the system horizontally will defeat the LSR Linear Spatial
Reference principles and cause destructive reection off the work surface. The loudspeakers should be angled so the
center of the high-frequency transducer in each speaker is aimed directly towards the ear of the listener. Ideally, the
LSR2328P and LSR2325P speakers should be placed on suitable speaker stands, rather than on the work surface, and
positioned away from walls and boundaries. The distance and position of the subwoofer can be adjusted to produce
best bass response in the room. Low frequency performance in the room can benet by placing the subwoofer close to
a wall or in a corner that may be further away from the mix position than the other speakers. When properly placed, you
should not be able to localize the bass produced by the subwoofer. That is, your ear should believe the bass is coming
from the Left and Right speakers.
In two channel production applications, the common listening distance is generally 1 to 1.5 meters (3 to 5 feet) from
the left and right speakers. The speakers should be placed so the position of the listener and the two speakers form
an equilateral triangle. In 5.1 Surround Sound production, the listening distance for all speakers from any speaker is
typically 5' to 8'. The placement of the Left and Right speakers should form an equilateral triangle with the mix position.
The Center speaker should be placed half way between the left and right speakers at exactly the same distance from
the mix position. The Left Surround and Right Surround speakers should be placed the same distance as the Left,
Center and Right speakers, and positioned 110 degrees to 150 degrees relative to the center speaker. The distance
and position of the subwoofer can be adjusted to produce best bass response in the room.
30º
30º
30º
30º
110º
150º
110º
150º
Mix Position
2 Channel System with
Subwoofer
5.1 Surround Sound
System
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Audio Connections
The LSR2300 Series Speakers are equipped with balanced XLR and 1/4" TRS connectors and unbalanced
RCA connectors for connection of professional computer audio interfaces, mixing consoles and audio production
equipment as well as unbalanced consumer audio products including personal music players, consumer audio
receivers and audio visual equipment.
Connect professional equipment with balanced outputs to the XLR or ¼" TRS input of the speaker using balanced
signal cables. (More information is available www.jblpro.com/lsr click on support.)
Connect consumer equipment with unbalanced outputs to the RCA input of the speaker.
The volume control on the rear of the speaker should be set to achieve the comfortable listening level when the
signal source is playing at it’s loudest volume. Positive voltage to Pin 2 of the XLR connector, the tip of the 1/4"
TRS jack, and the RCA jack will produce a forward motion in the low frequency cone.
Power Connections
The LSR2300 Models include a rear panel voltage selector switch that is set at the factory for the appropriate
voltage. Before connecting the power cable it is a good idea to check the position of this switch to conrm the
voltage switch is correctly set for the country of use. The power connector on the speaker includes a user-
replicable protective fuse. The ground terminal of the IEC plug is required by wiring codes and regulations and
must always be connected to the electrical installation safety ground. The LSR2300-Series units have carefully
designed internal grounding and balanced inputs and outputs to reduce the possibility of ground loops that
produce hum. If hum occurs, see Appendix A for suggested audio signal wiring, system grounding hints and
other preventive measures.
Making Sound
After connections are made, reduce the level of the monitor outputs of your console or preamp to minimum and
turn on the powered speakers. Then power-up all audio equipment before powering up the LSR2300 speakers.
When the Blue LED on the front of each turns on, the units are ready to reproduce audio signals. Slowly advance
the volume control of connected audio equipment to achieve a suitable listening level, and enjoy.
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Section 4: LSR2328P and LSR2325P Bi-amplied Studio Monitors
Front View Back View
Features
1. High Frequency Transducer “Tweeter” – Reproduces high frequency signals
2. EOS Elliptical Oblate Spheroidal Wave Guide with Elliptical Tweeter Aperture – Ensures the combination
of direct and reected sound arriving at the mix position is neutral and accurate. The Elliptical Aperture
opening in the wave guide around the tweeter optimizes high frequency performance above 10 kHz.
3. Low Frequency Transducer “Woofer” – Reproduces low frequency content of the input signal
4. Power Indicator – Illuminates when power is connected and the Power Switch is set to ON.
5. Low Frequency Port – Works in conjunction with the low frequency transducer to provide accurate low
frequency performance and air ow to cool the internal electronics.
6. Input Panel – Includes input connectors, power connector and user controls.
7Isolation Pad – The speaker is equipped with a foam pad on the bottom surface to provide acoustic
isolation from the supporting surface and increase stability when the speaker is placed on a speaker
stand or console top.
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Input Panel
8. XLR Input – Connect professional equipment using and XLR connector
9. ¼" Input - Connect equipment using a ¼" balanced or unbalanced connector
10. RCA Input – Connect consumer equipment using an RCA input.
11. Volume Control – Use this control to Set the maximum listening level
12. High Frequency Trim – Allows boost or cut of High Frequency output by +/- 2.5dB
13. Low Frequency Trim – Allows a 2 dB boost of low frequency output by or 3 dB attenuation of
low frequency output.
14. Power Connector –
15. Fuse Holder – Includes a user replaceable fuse and a spare fuse.
16. Voltage Selector – sets the operating voltage for compatibility with the voltage supply in the country of use
17. Power Switch – Activates power for the system.
Audio Connections
Connect Professional +4dBu and -10 dBV signal sources to either the XLR or ¼" input connectors. Connect
consumer -10dBV level equipment to the RCA input connectors. Connect only a single signal source to the speaker
using either XLR input connector, OR the ¼" TRS input connector OR the RCA input connector. Do not connect
multiple signal sources to multiple inputs of the same speaker simultaneously.
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16
LF Trim
HF Trim
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Section 5: LSR2310SP Powered Studio Subwoofer
Front View Back View
Features
1. Low Frequency Transducer “Woofer” – Reproduces low frequency signals
2. Protective Grille – Protects the woofer when the subwoofer is placed in a location where the woofer could
be damaged by feet, or objects.
3. Power Indicator – Illuminates when power is connected and the Power Switch is set to ON.
4. Feet – Elevates the Subwoofer to prevent acoustic coupling with the oor and prevent scratching of the
enclosure.
5. Low Frequency Port / Low Frequency Port – Works in conjunction with the low frequency transducer to
provide accurate low frequency performance and air ow to cool the internal electronics
6. Input Panel - Includes input connectors, power connector and user controls.
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