JBL Car Speaker LSR305 User Manual

Owners Manual  
LSR305  
5" Powered  
LSR308  
8" Powered  
LSR310 S  
10" Powered  
Studio Monitor  
Studio Monitor  
Studio Subwoofer  
 
Section 1: Important Safety Instructions  
1. Read these instructions.  
2. Keep these instructions.  
3. Heed all warnings.  
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.  
4. Follow all instructions.  
5. Do not use this apparatus near water.  
6. Clean only with dry cloth.  
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.  
7. Do not block any ventilation openings. Install in  
accordance with manufacturer’s instructions.  
8. Do not install near any heat sources such as  
radiators, heat registers, stoves or other apparatus  
that produce heat.  
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.  
9. Do not defeat the safety purpose of the 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 fit 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 receptacle and the  
point where the power cord connects to the apparatus.  
Any changes or modifications not expressly approved  
by the party responsible for compliance could void the  
user's authority to operate the equipment.  
11. Only use attachments/accessories specified by  
the manufacturer.  
This equipment has been tested and found to comply  
with the limits for a class B digital device, pursuant to  
part 15 of the FCC Rules. These limits are designed  
to provide reasonable protection against harmful  
interference in a residential installation. This equipment  
generates, uses and can radiate radio frequency energy  
and, if not installed and used in accordance with the  
instructions, may cause harmful interference to radio  
communications. However, there is no guarantee that  
interference will not occur in a particular installation.  
If this equipment does cause harmful interference to  
radio or television reception, which can be determined  
by turning the equipment off and on, the user is  
encouraged to try to correct the interference by one  
or more of the following measures:  
12. Unplug this apparatus during lightning storms or  
when unused for long periods of time.  
13. Refer all servicing to qualified service personnel.  
Servicing is required when the apparatus has been  
damaged in any way, including: 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.  
14. 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.  
Reorient or relocate the receiving antenna.  
15. The apparatus shall be connected to mains socket outlet  
with a protective earthing connection.  
Increase the separation between the equipment  
and receiver.  
WARNING:  
Connect the equipment into an outlet on a circuit  
different from that to which the receiver is connected.  
To reduce the risk of fire or electrical shock, do not  
expose the apparatus to rain or moisture.  
Consult the dealer or an experienced radio/ TV  
technician for help.  
The apparatus shall not be exposed to dripping or  
splashing and no objects filled 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 fire hazard.  
CAN ICES-3(B)/NMB-3(B)  
3
 
Contents  
Important Safety Instructions ..................................................................................... 3  
Introduction .............................................................................................................5-6  
Setting Up Your System .............................................................................................. 6  
What's Included?................................................................................................... 6  
Unpacking.............................................................................................................. 6  
Placement.............................................................................................................. 7  
Audio Connections ................................................................................................ 8  
Power Connections................................................................................................ 8  
Making Sound........................................................................................................ 9  
LSR305 and LSR308 Powered Studio Monitors  
Front and Rear Views........................................................................................... 10  
Input Panel........................................................................................................... 11  
Audio Connections .............................................................................................. 11  
LSR310S Powered Studio Subwoofer  
Front and Rear View ........................................................................................... 12  
Input Panel........................................................................................................... 13  
Audio Connections .............................................................................................. 13  
Setting Subwoofer Level ..................................................................................... 14  
Placement and Polarity........................................................................................ 14  
XLF, Extended Low Frequency Setting,  
Crossover Settings and Bass Management ........................................................ 14  
Surround Sound and .1 LFE Channel .................................................................. 15  
Systems Connections .........................................................................................16-17  
Trouble Shooting ........................................................................................................ 18  
Specifications............................................................................................................. 19  
JBL Service Contact Information.............................................................................. 20  
Product Warranty Information ................................................................................. 21  
4
 
Section 2: Introduction  
Congratulations on your purchase of JBL Professional 3 Series Studio Monitors. These studio monitors and  
Subwoofer meet JBL’s high standards for accuracy and long-term reliability in demanding professional  
applications. All 3 Series 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 acoustically varied work spaces and  
production environments. Additionally, each speaker is equipped to interface with a range of signal  
sources including high-output professional equipment.  
JBL LSR Linear Spatial Reference Design  
Because listening environments vary, JBL designed the 3 Series system using LSR Linear Spatial Reference  
design criteria that improve 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 reflected sound 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 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.  
3-Series Image Control Waveguide  
JBL’s revolutionary Image Control Waveguide gives the LSR305 and LSR308 remarkable imaging, a wide  
sound-stage, and a solid “phantom center. Subtle details can be heard, even in a dense mix. As an added  
benefit, incorporating this waveguide, 3-Series models give you a broad “sweet-spot” in your work space,  
so you don’t have to be seated directly in front of the speakers to hear accurate, natural and open sound.  
3 Series models include a range of features to meet the needs of demanding audio production applications.  
LSR305 and LSR308 models include:  
Low frequency magnetically-shielded transducers, equipped with 1.5" voice coils and robust motor structures to  
provide excellent low frequency performance. By reducing thermal-related effects, the 3 Series Studio Monitors  
and Subwoofer sound the same at low, medium and high levels. The woofers are magnetically shielded to prevent  
interference with magnetically sensitive displays and equipment. The woofer’s self-repairing dust dome is resistant  
to dents caused by fingers or external objects.  
JBL’s Patented Slip Stream low frequency port design that works in concert with the woofer to produce deep  
bass response at all playback levels. The double-flared shape of the port is precisely engineered for greater low-  
frequency extension and reduced turbulence.  
Bi-amplified Design with individual power amplifiers for the Low Frequency and High Frequency Transducers.  
The design utilizes efficient high-output Class D integrated power amplifiers to provide high SPL  
(Sound Pressure Level) for demanding production applications.  
Soft dome magnetically-shielded high-frequency transducers with optimally damped materials to improve  
transient response and minimize distortion. By reducing distortion in the lower operating range, where the  
ear is most sensitive, these transducers reduce ear fatigue.  
Balanced XLR and 1/4" connectors, a dented level attenuator to allow interface to a broad range of signal  
sources. The +4 dB / -10 dB input sensitivity switch allows connection of the speakers to high-output  
professional equipment without danger of input overload.  
High Frequency and Low Frequency Trim controls in the LSR308 and LSR305 allow adjustment of frequency  
response to preference, or to compensate for acoustically reflective or absorptive listening environments.  
Producing extended low frequency into the 20 Hz region, the LSR310S is the perfect match for the LSR305  
and LSR308 Studio monitors. The LSR310S feature set includes:  
A custom designed down-firing, High-Excursion 10" woofer with an additional bucking magnet.  
200 Watts Class D Power Amplifier with abundant output and dynamic headroom for the most  
demanding production styles.  
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Patented Slip Stream Port – The patented JBL low frequency port design works in concert with the  
3 Series woofer for accurate bass response at all playback levels.  
A detented volume control makes it easy to balance of the LSR310S in your studio monitor system.  
Balanced XLR and 1/4" inputs and XLR outputs you can add the LSR310S to any studio monitor system  
to extend its low frequency performance, or use it as the “.1” LFE Channel in a surround sound system.  
The -10 dBV/+4 dBu sensitivity switch ensures compatibility with a broad range of signal sources, allowing  
you to connect the LSR310S to high-output professional equipment without any danger of input overload.  
Three Crossover settings: 80 Hz, XLF, External  
The 80 Hz setting implements high and low pass filters to create a seamless blend of the LSR310S with  
JBL’s LSR305 or LSR308 studio monitors or models from other manufacturers.  
The external setting bypasses all filtering, allowing use of an external crossover.  
The special XLF setting activates a 120 Hz High Pass Filter in conjunction with a low frequency tuning  
that approximates the tuning used in club playback systems. Using this setting, the bass output more  
than doubles.  
A protective limiting circuit allows the subwoofer to operate continuously at full output without failure.  
JBL Professional Reliability  
Prior to becoming a production-ready design, each 3 Series model is subjected to JBL’s tough 100-hour power  
test, in which the speaker is required to play continually at full output for 100 hours without failure. This demanding  
test ensures your 3 Series speakers will deliver years of reliable performance. To get the most out of your JBL 3  
Series, please review this owner’s manual and keep it on hand for future reference. Also, please register your new  
Section 3: Setting Up Your System  
Each 3 Series box includes the following items:  
One 3 Series Studio Monitor or Subwoofer  
One Power Cord  
Quick Set Up Guide  
LSR308 and LSR305 include peel-off rubber pads  
UNPACkING  
When removing a speaker from its packaging, we recommend the following procedure, which will prevent  
damage of the high frequency transducer located near the top of the cabinet on the front of the speaker:  
LSR305 and LSR308:  
Remove the outer shipping carton, if one exists.  
Place the inner carton on the floor with the top facing upwards.  
Open the top of the box.  
Without removing the internal packaging end-cap, gently rotate the carton so the open end  
rests on the floor and the bottom of the carton is facing you.  
Gently lift the carton allowing the speaker and protective end-cap to slide out of the carton  
and remain on the floor.  
Save the cartons and use the above procedure in reverse when you want to repack the  
units for shipment.  
6
 
LSR310S Subwoofer - The subwoofer weighs 19 kg (42 lbs.) Unpacking the subwoofer does not require you lift the  
subwoofer. However, you will need to rotate the subwoofer in the carton. If you are unable to perform the following  
steps without assistance, please request help from another person.  
Remove the outer shipping carton, if one exists.  
Place the carton on the floor with the bottom facing upward.  
Open the bottom flaps of the carton and remove any protective packing materials from the bottom of the  
subwoofer. Open the bag that protects subwoofer, exposing the subwoofer’s four feet.  
Gently rotate the carton so the bottom of the carton is facing the floor and the four feet of the subwoofer are  
in contact with the floor.  
Gently lift the carton allowing the subwoofer and protective packing materials to slide out of the carton and  
remain on the floor.  
Remove the protective packing materials and documentation from the top of the subwoofer. Save the  
cartons and use the above procedure in reverse when you want to repack the units for shipment.  
PLACEMENT  
3 Series speakers are designed to deliver exceptional imaging in any room. To get the most out of your speakers,  
follow these recommendations:  
Locate the four self-adhesive rubber pads supplied with LSR305 and LSR308 speakers. Position and attach  
these to the bottom surface of the speaker close to each corner.  
Position each LSR305 and LSR308 speaker in a vertical orientation with the tweeter on the top.  
Vertical orientation eliminates phase shift and cancellation of frequency response that occurs when the  
distance of the woofer to the ear is different from the distance of the tweeter to the ear.  
Angle the speakers so the high-frequency transducer in each speaker is aimed directly towards the ear  
of the listener.  
Ideally, LSR305 and LSR308 Series speakers should be placed on suitable speaker stands, rather than on  
the work surface. This will reduce resonance and deterioration of low frequency performance that occurs  
through the speaker’s mechanical coupling with the work surface.  
For optimum imaging, the left speaker and the right speaker should be placed symmetrically in the room,  
so each speaker is the same distance from adjacent walls and reflective surfaces.  
The speakers should be placed so the position of the listener and the two speakers form an equilateral  
triangle. Adjusting the distance between the speakers will affect the quality of bass heard at the listening  
position. You can experiment with speaker placement to find the placement that produces the preferred  
bass response, imaging and when listening to stereo material, produces a strong “phantom” center in  
which vocals and some instruments seem to originate from a point between speakers.  
The listening distance can be determined according to your preference, the acoustics of your room and the  
maximum SPL (Sound Pressure Level) you want to hear at the listening position. You can find the speaker’s  
maximum SPL at 1 Meter in the Specifications Section at the end of this manual. Each doubling of listening  
distance will reduce the SPL at the listening position by 6 dB in an acoustically absorptive room, but only 3  
or 4 dB in an acoustically reflective room.  
LSR310S Subwoofer placement: The low frequency driver of the 310S is mounted on the bottom panel of the  
subwoofer. Before placing the subwoofer, make sure the position on the floor is free of any large objects that can  
interfere with or damage the woofer. In a stereo system, The LSR310S Subwoofer should be placed directly on the  
floor, located between the Left and Right Speakers. In a surround sound system, the subwoofer can be located  
between the Left and Center or between the Right and Center channel Speakers. The distance of the subwoofer  
from the listening position can be adjusted to produce the optimum balance of bass in the system. Placing the  
subwoofer close to a wall or in a corner generally will increase the amount of bass heard in the room. Experiment to  
determine the Subwoofer placement that produces the best balance and quality of bass in the system.  
7
 
Section 4: LSR305 and LSR308 Powered Studio Monitors  
SUB / LFE  
CENTER  
SUB / LFE  
LEFT  
RIGHT  
LEFT  
RIGHT  
MIX POSITION  
MIX POSITION  
LEFT  
SURROUND  
RIGHT  
SURROUND  
AUDIO CONNECTIONS  
The 3 Series Speakers are equipped with balanced XLR and 6 mm (¼") TRS inputs for connection to 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 6 mm (¼") TRS input of the speaker using balanced  
signal cables.  
3-Series speakers are equipped with an INPUT SENSITIVITY SWITCH. The switch is set to the -10 dBV setting  
when it ships from our factory. This setting will be best for many applications. However, you can set the switch  
to the +4 dBu setting:  
When connecting 3 Series speakers to professional equipment with +4 dBu nominal output level, set  
the INPUT SENSITIVITY SWITCH to the +4 dBu setting. To determine the nominal output level of the  
connected equipment, consult the documentation supplied with the connected equipment.  
If you notice the sound is distorted, set this switch to the +4 dBu setting.  
When using the LSR310S in a system with the LSR308 or LSR305 studio monitors, set the INPUT  
SENSITIVITY switch on the LSR305 or LSR308 to the -10dBV setting regardless of the LSR310S input  
sensitivity switch setting.  
LSR310S Subwoofer connections  
The left and right outputs of the signal source should be connected directly to the LEFT and RIGHT INPUTS of the  
subwoofer. The LEFT and RIGHT OUTPUTS of the subwoofer should be connected to the inputs of the left and  
right speakers respectively.  
POWER CONNECTIONS  
The 3 Series speakers incorporate a universal power supply allowing these to be used domestically and  
internationally. 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.  
8
 
MAkING SOUND  
After connections are made, reduce the output level of the audio source (mixing console, computer recording  
system, or preamp) to minimum. Set the 3 Series POWER SWITCH to the “ON position.” After a short delay  
the POWER INDICATOR on the front of each speaker will illuminate and the speakers will be ready to reproduce  
audio signals. Power-on connected audio equipment, and slowly advance the volume control of connected  
audio equipment to achieve a suitable listening level. Balance the subwoofer in the system using the rear panel  
VOLUME CONTROL on each speaker. Additional balance of bass can be achieved by adjusting the placement  
of the subwoofer in the room.  
9
 
Section 4: LSR305 and LSR308 Powered Studio Monitors  
Front View  
Back View  
1
3
2
6
4
5
7
8
9
FEATURES  
1. HIGH FREQUENCY TRANSDUCER (Tweeter) – Reproduces high frequency signals.  
2. WAVEGUIDE – The specially designed Image Control Waveguide enhances imaging and  
optimizes the blend of direct and reflected sound in the room, ensuring neutral sound  
at the mix position.  
3. POWER INDICATOR - Illuminates when power is connected and the POWER SWITCH is set to ON.  
Note after setting the power switch to ON, there is a short delay prior to illumination of the LED.  
4. LOW FREQUENCY TRANSDUCER (Woofer) – Reproduces low frequency content of the input signal.  
5. DUST DOME - Protects the inner circuit of the woofer. This self-repairing dust dome is resistant to  
dents caused by fingers and objects.  
6. LOW FREQUENCY PORT – The patented Slip StreamPort works in conjunction with the low  
frequency transducer to provide accurate low frequency performance.  
7. INPUT PANEL – Includes input connectors, power connector and user controls.  
8. ENCLOSURE  
9. PADS - Pads supplied with each monitor are user-installed.  
10  
 
INPUT PANEL  
10. XLR INPUT – Connect professional equipment using an XLR connector.  
11. 6 mm (¼") INPUT - Connect equipment using a 6 mm (¼") balanced or unbalanced connector.  
12. INPUT SENSITIVITY SWITCH – Set this switch to +4 dBu to protect from overload when connecting to  
professional equipment and sources with very high output.  
13. LOW FREQUENCY TRIM – Allows boost or attenuation of low frequency output by 2 dB.  
14. HIGH FREQUENCY TRIM – Allows boost or attenuation of high frequency output by 2 dB.  
15. VOLUME CONTROL – Use this control to set the maximum listening level.  
16. POWER RECEPTACLE – Connection for the power cord.  
17. POWER SWITCH – Activates power for the system.  
12  
10  
11  
13  
15  
14  
17  
16  
AUDIO CONNECTIONS  
Connect signal sources to either the XLR or 6 mm (¼") INPUT CONNECTORS. Connect only a single signal  
source to the speaker using either the XLR INPUT CONNECTOR, OR the 6 mm (¼") TRS INPUT CONNECTOR.  
Do not connect multiple signal sources to both input connectors simultaneously.  
11  
 
Section 5: LSR310S Powered Studio Subwoofer  
Front View  
Back View  
4
2
5
1
3
3
Bottom View  
1
FEATURES  
1. LOW FREQUENCY TRANSDUCER “WOOFER” – Reproduces low frequency signals.  
2. POWER INDICATOR – Illuminates when power is connected and the Power Switch is set to ON.  
3. FEET - Elevate the subwoofer to prevent acoustic coupling with the floor.  
4. LOW FREQUENCY PORT – Works in conjunction with the low frequency transducer  
to provide accurate low frequency performance.  
5. INPUT PANEL - Includes input connectors, power connector and user controls.  
12  
 
INPUT PANEL  
6. RIGHT and LEFT XLR INPUTS  
7. RIGHT and LEFT 6mm (1/4")  
8. RIGHT and LEFT XLR OUTPUTS  
9. INPUT SENSITIVITY switch – Set this switch to the +4 dBu setting when connecting professional equipment  
and sources with very high output. NOTE: When the LSR310S is used in a system with LSR305 and LSR308,  
set the INPUT SENSITIVITY switch on the LSR305 or LSR308 to the -10dBV setting regardless of the LSR310S  
input sensitivity switch setting.  
10. VOLUME CONTROL – Use this control to balance the volume of the subwoofer with the volume of the  
speakers in the system.  
11. CROSSOVER FREQUENCY Three settings are provided: 80 Hz, XLF and External - The 80 Hz setting  
is recommended for use with the LSR305, LSR308 and any studio monitors. The External setting allows use of  
an outboard crossover. Select the XLF Extended Low Frequency setting to activate a circuit that emulates the  
bass tuning commonly applied to playback systems in club environment.  
12. POLARITY – Enables optional 180 degree reversal of the subwoofer output to optimize the blend of the  
subwoofer with the main speakers according to relative positions of speakers and the listening position in the  
room. Select the setting that produces the greatest amount of bass when heard at the listening position.  
13. POWER RECEPTACLE – Connection for the power cord.  
14. POWER SWITCH – Activates power for the subwoofer.  
8
7
6
12  
11  
9
10  
13  
14  
AUDIO CONNECTIONS  
Connect signal sources to either the XLR or 6 mm (¼") INPUT CONNECTORS. Connect a single signal source to  
the speaker using either the XLR INPUT CONNECTORs, OR the 6 mm (¼") TRS INPUT CONNECTORs. Do not  
connect multiple signal sources to the XLR and 6 mm (1/4”) input connectors simultaneously. When using the  
LSR310S in a Surround Sound System – if the LSR310S Subwoofer is being used to reproduce the .1 LFE channel  
in a surround sound system, connect the .1 LFE signal to either the LEFT or RIGHT input of the subwoofer.  
13  
 
SETTING THE SUBWOOFER LEVEL  
When the LSR310S Subwoofer is used in a system with LSR305 or LSR308 speakers, the ideal balance is  
achieved when the position of the volume control on the subwoofer is set to the same position as the volume  
control on the main speakers. Placement of the speakers in the room can affect the amount of bass heard at  
the listening position.  
If more or less subwoofer volume is desired, you may use the volume control on the subwoofer to achieve the  
balance that works best for your application and taste.  
PLACEMENT AND POLARITY SETTING  
Because the human ear cannot easily recognize where low frequencies are originating (they are said to be  
“non-directional”), subwoofer placement is not nearly as critical as main channel speaker positioning. The  
LSR310S is designed to be placed directly on the floor and not elevated or mounted in any way. Set the  
POLARITY switch to the setting that yields a stronger perceived bass response at the listening position.  
In a stereo system, the subwoofer should optimally be placed between the two main speakers. In a surround  
sound system, the subwoofer should be placed between the center and left channel speakers or the center  
and right channel speakers. Precise central placement is not necessary. Centered positioning in the room can  
sometimes cause unwanted cancellation, so it is recommended that the subwoofer be placed slightly off-  
center and not at the midpoint between the left and right walls.  
CROSSOVER SETTINGS AND “BASS MANAGEMENT”  
“Bass management” is a term that refers to the practice of using a subwoofer to reproduce the bass frequencies  
of the main channels. Because of the physiology of the human ear, low frequencies are largely  
non-directional. Given an adequate listening distance, we can’t easily tell where bass signals are coming from.  
Thus, it makes little or no difference to the listening experience whether the bass component in a sound comes  
from the originating speaker (which may be off to your left or right, or even behind you) or from a dedicated  
subwoofer which is better equipped – and better positioned in the room – to reproduce low frequencies than  
even a full-range monitor. For that reason, you may want to use an LSR310S subwoofer to reproduce all the  
bass frequencies in your system. If you are using an LSR310S Subwoofer in your system, bass management is  
accomplished simply by routing your Left and Right mix channels to the Subwoofer inputs and then from the  
subwoofer outputs to the Left and Right speakers. The frequency at which the subwoofer divides signals to  
the sub and the left and right speakers can be set using the Crossover Frequency selector switch on the input  
panel of the LSR310S Subwoofer. The 80Hz filter setting is recommended when the goal is a full range reference  
monitor system that accurately portrays content below the cut-off of the main speakers. The 80 Hz crossover  
provides a smooth transition and between the subwoofer and the main speakers, while optimizing the blend of  
low frequency in the system, without audible localization of bass, creating the perception of a full range system  
with no subwoofer.  
To produce a smooth transition between the speakers and the subwoofer and the goal is an accurate  
representation of frequency response in the program material. Two additional settings are provided:  
XLF and External.  
XLF  
A trend in music production is the requirement for enhanced low frequency response in the control room.  
Artists and producers involved in the production of dance music appreciate the ability to audition their work as it  
might sound when played on a system with enhanced low frequency tuning, commonly employed in dance clubs.  
A JBL first, the LSR310S includes a special XLF Extended Low Frequency setting that emulates the response  
curve applied to a club playback system. When the XLF crossover setting is selected, a 120Hz High Pass Filter is  
engaged in conjunction with a 10 dB boost at 60Hz with a bandwidth of 0.5 octaves. Using this setting, the bass  
output more than doubles and the character of low frequency approximates that of a club system. Continuous  
low frequency with very high peak SPL is made possible by JBL’s new long excursion low frequency driver  
working in concert with JBL’s patented Slip Stream™ Port design, and powered by a 200 Watt class D amplifier.  
A protective circuit allows the 310S to continuously produce low frequency at high output without failure.  
In situations where positioning will allow, an additional 6 dB of output can be achieved by positioning the  
LSR310S subwoofer adjacent to a wall or at the intersection of two walls.  
14  
 
External  
Select this setting when connecting the subwoofer to an external bass management system.  
When external is selected, XLR left and right outputs are disabled.  
SURROUND SOUND SYSTEMS AND LFE  
The LSR310S Subwoofer can be used to reproduce the LFE (Low Frequency Effects) or .1 channel in a  
surround sound system. In film production applications, the LFE channel contains low frequency effects,  
such as the sounds of explosions, and other sounds with a strong low frequency component. In music  
applications, the LFE channel usually contains low frequency instruments such as bass, bass drum, and  
synthesizer elements.  
15  
 
Section 6: System Connections  
TWO CHANNEL SYSTEMS  
LEFT  
RIGHT  
CHANNEL SPEAKER  
CHANNEL SPEAKER  
SUBWOOFER  
MIxER  
16  
 
SURROUND SOUND SYSTEMS  
LEFT  
CENTER  
SPEAKER  
RIGHT  
CHANNEL SPEAKER  
CHANNEL SPEAKER  
SUBWOOFER  
COMPUTER  
AUDIO INTERFACE  
COMPUTER  
AUDIO SYSTEM  
LEFT  
SURROUND SPEAKER  
RIGHT  
SURROUND SPEAKER  
17  
 
Section 7: Trouble Shooting  
TROUBLE SHOOTING  
If there is no sound from your speakers, check these settings:  
Make sure a signal source is connected and producing sound.  
Make sure the POWER INDICATOR is illuminated on the front of the speaker.  
Make sure the VOLUME CONTROL is not set to the full counter-clockwise minimum position.  
Confirm the power cable is connected and the POWER SWITCH is set to the ON position.  
If the above measures do not correct the problem, please contact JBL Professional Customer Service.  
18  
 
Section 8: Specifications  
Specifications  
LSR305  
LSR308  
LSR310S  
Frequency Range: 43 Hz – 24 kHz  
37 Hz - 24 kHz  
27 Hz  
Crossover: 1725 Hz 4th order acoustic  
1800 Hz 4th order acoustic  
Linkwitz-Riley  
- - -  
Linkwitz-Riley  
Maximum Peak SPL: 108 dB SPL *  
112 dB SPL *  
113 dB **  
Maximum Peak Input Level: +6 dBV / +20.3 dBu  
+6 dBV / +20.3 dBu  
+6 dBV / +20.3 dBu  
-10 dBV / +4 dBu  
Input Connectors: 1 x XLR, 1 x TRS Balanced  
1 x XLR, 1 x TRS Balanced  
92 dB / 1m  
2 x XLR, 2 x TRS Balanced  
92 dB / 1m  
Input Sensitivity: 92 dB / 1m  
(-10 dBV input)  
HF Driver Size: 25 mm (1")  
LF Driver Size: 127 mm (5")  
25 mm (1")  
203 mm (8")  
56W Class D  
- - -  
250 mm (10")  
HF Driver Power Amp: 41 W Class D  
- - -  
LF Driver Power Amp: 41 W Class D  
56W Class D  
200W Class D  
HF Trim Control: +2 dB, 0, -2 dB @ 4.4 kHz  
LF Trim Control: +2 dB, 0, -2 dB @ 115 Hz  
AC Input Voltage: 100-240 VAC +/- 10% 50/60 Hz  
Enclosure Construction: 15 mm (5/8 in) MDF  
+2 dB, 0, -2 dB @ 4.4 kHz  
+2 dB, 0, -2 dB @ 115 Hz  
100-240 VAC +/- 10% 50/60 Hz  
15 mm (5/8 in) MDF  
- - -  
- - -  
100-240 VAC +/- 10% 50/60 Hz  
18 mm (3/4 in) MDF  
Enclosure Finish: Matte Black PVC  
Matte Black PVC  
Matte Black PVC  
Baffle Construction: Injection-molded structural ABS  
Baffle Finish:d Metallic Black Acrylic Paint  
Injection-molded structural ABS  
Metallic Black Acrylic Paint  
- - -  
- - -  
Dimensions (H x W x D): 298 mm x 185 mm x 231 mm  
419 mm x 254 mm x 308 mm  
(16.5 in x 10.0 in x 12.1 in)  
448 mm x 381 mm x 398 mm  
(17.65 in x 15.0 in x 15.65 in)  
(11.75 in x 7.28 in x 9.88 in)  
Weight: 4.6 kg (10.12 lbs)  
8.6 kg (18.9 lbs)  
15.6 kg (34.3 lbs)  
Display Carton (H x W x D): 354 mm x 244 mm x 299 mm  
473 mm x 312 mm x 358 mm  
(18.6 in x 12.2 in x 14.0 in)  
505 mm x 466 mm x 476 mm  
(19.9 in x 18.3 in x 18.7 in)  
(13.93 in x 9.6 in x 11.77 in)  
Shipping Carton (H x W x D): 373 mm x 260 mm x 315 mm  
491mm x 326 mm x 371 mm  
(19.3 in x 12.8 in x 14.6 in)  
520 mm x 478 mm x 488 mm  
(20.5 in x 18.8 in x 19.2 in)  
(14.69 in x 10.22 in x 12.4 in)  
Shipping Weight: 6 kg (13.2 lbs)  
10 kg (22 lbs)  
19.1 kg (42 lbs)  
* Full Bandwidth Pink Noise Measured C-Weighted  
** Measured in Half Space  
19  
 
Section 9: JBL Service Contact Information  
MAILING ADDRESS:  
JBL Professional  
8500 Balboa Blvd.  
Northridge, CA 91329  
SHIPPING ADDRESS:  
JBL Professional  
8500 Balboa Blvd., Dock 15  
Northridge, CA 91329  
(Do not return 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)  
PRODUCT REGISTRATION:  
On The World Wide Web:  
PROFESSIONAL CONTACTS, OUTSIDE THE USA:  
Contact the JBL Professional Distributor in your area. A complete list of JBL Professional international  
EN DEHORS DES ETATS-UNIS:  
Contacter votre Distributeur JBL Professional. Une liste complète de nos distributeurs internationaux est  
INTERNATIONAL:  
Wenden Sie sich an Ihre örtliche JBL Professional Vertretung. Eine vollständige Liste der internationalen  
FUERA DE LOS ESTADOS UNIDOS:  
encontrará una lista completa de los distribuidores de JBL International.  
20  
 
Section 10: Product Warranty Information  
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 is presented 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  
PURPOSE, 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  
8500 Balboa Boulevard  
Northridge, CA 91329 USA  
21  
 
Part Number:  
Rev 5041835A  
 

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