JBL LSR305, LSR308 User guide
Owners Manual
LSR305
5" Powered
Studio Monitor
LSR308
8" Powered
Studio Monitor
Thank you for your purchase of JBL 3 Series Powered 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 with 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 recepticle and the
point where the power cord connects to the apparatus.
Explanation of Graphic Symbols
The exclaimation 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 ash with the arrowhead
symbol, within an equilateral triangle, is to
alert the user to the presence of insulated
“dangerous voltage” within the products en-
closure that may be of sufcient magnatude
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.
Any changes or modications not expressly approved
by the party responsible for compliance could void the
user's authority to operate the equipment.
11. Only use attachments/accessories specied by the
manufacturer.
12. Unplug this apparatus during lightning storms or when
unused for long periods of time.
13. Refer all servicing to qualied 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.
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
•
splashing 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.
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.
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Contents
Important Safety Instructions ........................................................................................ 3
Introduction .................................................................................................................. 5
Setting Up Your System ................................................................................................ 6
What's Included? .................................................................................................... 6
Unpacking .............................................................................................................. 6
Placement .............................................................................................................. 6
Audio Connections ................................................................................................. 7
Power Connections ................................................................................................ 7
Making Sound ........................................................................................................ 7
LSR305 and LSR308 Powered Studio Monitors
Front and Rear Views ............................................................................................ 8
Input Panel ............................................................................................................. 9
Audio Connections ................................................................................................. 9
Systems Connections ................................................................................................ 10
Appendix – Trouble Shooting ......................................................................................11
Appendix - Specications ........................................................................................... 12
JBL Service Contact Information ................................................................................ 13
Product Warranty Information .................................................................................... 14
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Section 2: Introduction
Congratulations on your purchase of JBL Professional 3 Series Studio Monitors. These studio monitors 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 reected 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 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.
3-Series Image Control Wave Guide
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 benet,
incorporating this wave guide, 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.
LSE305 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 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 ngers 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-ared shape of the port is precisely engineered for
greater low-frequency extension and reduced turbulence.
• Bi-amplied Design with individual power ampliers for the Low Frequency and High Frequency
Transducers. The design utilizes efcient high-output Class D integrated power ampliers 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 reective or absorptive listening
environments.
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 Studio Monitors, 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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