JBL Lsr 310 S Manual

							Owners Manual
LSR308
8" Powered
 Studio Monitor
LSR305 
5" Powered
Studio MonitorLSR3 10 S
10" Powered
 Studio Subwoofer 
						

							2
 
Thank you for your purchase of JBL 3 Series Studio Monitors
To receive important information as it becomes available  
please take a moment to register your 3 Series speakers now.
Click the link or go to www.jblpro.com/3series  
						

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Section 1: 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 manufacturer’s instructions.
8.    Do not install near any heat sources such as  
radiators, heat registers, stoves or other apparatus  
that produce heat.
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.
11.   Only use attachments/accessories specified by  
the manufacturer.  
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. 
15.  The apparatus shall be connected to mains socket outlet  with a protective earthing connection. Any changes or modifications  not expressly approved 
by the party responsible for compliance could void the 
user's authority to operate the equipment.
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:
•  Reorient or relocate the receiving antenna.
•  Increase the separation between the equipment  
    and receiver.
•  Connect the equipment into an outlet on a circuit  
    different from that to which the receiver is connected.
•  Consult the dealer or an experienced radio/ TV  
     technician for help.  
CAN ICES-3(B)/NMB-3(B)     
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.
WARNING:
•  To reduce the risk of fire or electrical shock, do not  
    expose the apparatus to rain or moisture.
•  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.   
						

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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  
						

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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 an\
d  
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 t\
o 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 coil\
s 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 int\
erface to a broad range of signal  
sources.  The +4 dB / -10 dB input sensitivity switch allows connection of t\
he 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 addit\
ional 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, t\
he 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 
speakers at www.jblpro.com/registration.
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.  
						

							7
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 t\
he 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 LSR30\
8 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 tha\
n 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 pl\
aced 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 tw\
o 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 pr\
oduces 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 thi\
s 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 Spea\
kers. 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.   
						

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Section 4: LSR305 and LSR308 Powered Studio Monitors
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 connect\
ed equipment.
 
  •   If you notice the sound is distorted, set this switch to the +4 dBu sett\
ing.
 
  •   When using the LSR310S in a system with the LSR308 or LSR305 studio moni\
tors, 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 thes\
e 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.
MIX POSITIONMIX POSITION
LEFT SUB / LFE
RIGHT CENTER
LEFT
SURROUND RIGHT
SURROUNDLEFT SUB / LFE
RIGHT  
						

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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 subwo\
ofer 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.    
						

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Section 4: LSR305 and LSR308 Powered Studio Monitors
  
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 Stream
™ Port 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.
1
3
4
9
58 6
7
Front View Back View
2