JBL Lsr 310 S Manual

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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 conne\
ctor.
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.
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.
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Section 5: LSR310S Powered Studio Subwoofer
  
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 P ANEL - Includes input connectors, power connector and user controls.
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Front View
Bottom View Back View  
						

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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 s\
etting 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.
AUDIO CONNECTIONS 
Connect signal sources to either the XLR or 6 mm (¼") INPUT CONNECTORS. Connect a sing\
le 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.
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SETTING THE SUBWOOFER LEVEL 
When the LSR310S Subwoofer is used in a system with LSR305 or LSR308 spe\
akers, 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 ch\
annel 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 c\
omes 
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 speake\
rs, 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\
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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.   
						

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Section 6: System Connections
  
 
LEFT  
CHANNEL SPEAKER RIGHT  
CHANNEL SPEAKER
SUBWOOFER
MIxER
TWO CHANNEL SYSTEMS  
						

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SUBWOOFER
COMPUTER 
AUDIO SYSTEM LEFT  
CHANNEL SPEAKER RIGHT  
CHANNEL SPEAKER
CENTER
 SPEAKER
COMPUTER  
AUDIO INTERFACE
LEFT  
SURROUND SPEAKER RIGHT  
SURROUND SPEAKER
SURROUND SOUND SYSTEMS   
						

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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 th\
e ON position.
If the above measures do not correct the problem, please contact JBL Professional Customer Service.  
						

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Section 8: Specifications
Specifications
LSR305LSR308 LSR310S
Frequency Range:43 Hz – 24 kHz 37 Hz - 24 kHz 27 Hz
Crossover: 1725 Hz 4th order acoustic 
Linkwitz-Riley 1800 Hz 4th order acoustic 
Linkwitz-Riley
- - -
Maximum Peak SPL: 108 dB SPL * 112 dB SPL * 113 dB **
Maximum Peak Input Level:   -10 dBV / +4 dBu    +6 dBV / +20.3 dBu
 +6 dBV / +20.3 dBu +6 dBV / +20.3 dBu
Input Connectors: 1 x XLR, 1 x TRS Balanced 1 x XLR, 1 x TRS Balanced 2 x XLR, 2 x TRS Balanced
  Input Sensitivity: (-10 dBV input) 92 dB / 1m
92 dB / 1m 92 dB / 1m
HF Driver Size: 25 mm (1") 25 mm (1")
- - -
LF Driver Size: 127 mm (5") 203 mm (8") 250 mm (10")
HF Driver Power Amp: 41 W Class D 56W 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 +2 dB, 0, -2 dB @ 4.4 kHz   - - -
LF Trim Control: +2 dB, 0, -2 dB @ 115 Hz +2 dB, 0, -2 dB @ 115 Hz   - - -
AC Input Voltage: 100-240 VAC +/- 10% 50/60 Hz 100-240 VAC +/- 10% 50/60 Hz 100-240 VAC +/- 10% 50/60 Hz
Enclosure Construction: 15 mm (5/8 in) MDF 15 mm (5/8 in) MDF 18 mm (3/4 in) MDF
Enclosure Finish: Matte Black PVC Matte Black PVC Matte Black PVC
Baffle Construction: Injection-molded structural ABS Injection-molded structural ABS   - - -
Baffle Finish:d         Metallic Black Acrylic Paint    Metallic Black Acrylic Paint     - - -
Dimensions (H x W x D): 298 mm x 185 mm x 231 mm 
(11.75 in x 7.28 in x 9.88 in) 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)
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 
(13.93 in x 9.6 in x 11.77 in)  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)
Shipping Carton (H x W x D): 373 mm x 260 mm x 315 mm 
(14.69 in x 10.22 in x 12.4 in) 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) 
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    
						

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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)
www.jblproservice.com 
PRODUCT REGISTRATION:
Register your product online at www.jblpro.com/registration
On The World Wide Web:
www.jblpro.com
PROFESSIONAL CONTACTS, OUTSIDE THE USA:
Contact the JBL Professional Distributor in your area. A complete list of JBL Professional international 
distributors is provided at our U.S.A. website: www.jblpro.com
EN DEHORS DES ETATS-UNIS:
Contacter votre Distributeur JBL Professional. Une liste complète de nos distributeurs internationaux est 
disponible sur le site web - www.jblpro.com
INTERNATIONAL:
Wenden Sie sich an Ihre örtliche JBL Professional Vertretung. Eine vollständige Liste der internationalen  
JBL-Vertretungen finden Sie auf unserer Website unter www.jblpro.com
FUERA DE LOS ESTADOS UNIDOS:
Comuníquese con el distribuidor de JBL Professional de su zona. En nuestro sitio web, www.jblpro.com, 
encontrará una lista completa de los distribuidores de JBL International.