JBL Speaker S310II User Manual

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8 ”  
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S26II, S38II,  
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312
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O W N E R S G U I D E  
P R O D U C T L I N E :  
STUDIOSERIES  
D E S I G N G O A L : Bring the thrill of live performance and movie sound to  
the home environment by calling on JBLs professional engineering leadership.  
T W E E T E R T Y P E : Pure-titanium dome with EOSwaveguide  
W O O F E R T Y P E : Cast-aluminum basket with HeatScapemotor structure  
C R O S S O V E R N E T W O R K : Straight-Line Signal Path(SSP)  
P O R T D E S I G N : FreeFlowflared  
P R O F E S S I O N A L R E F E R E N C E : Studio Monitor  
 
S P E A K E R P L A C E M E N T  
Proper placement of the  
loudspeakers. Use these  
placement recommendations  
as a guide. Slight variations  
will not diminish your  
All of the Studio Series  
loudspeakers are video-  
shielded and can safely be  
placed near a television.  
speakers is an important step  
in obtaining the most realistic  
soundstage possible. These  
recommendations are for the  
optimum placement of the  
listening pleasure.  
MODELS: S310II, S312II  
MODEL: S26II  
As Front Speakers  
As Surround Speakers  
5 6 ft.  
MODEL: S38II  
The S38II can be oriented  
either horizontally or  
vertically; however, best  
performance will result from  
horizontal placement. The  
logo may be oriented as  
needed by gently pulling it  
out slightly, rotating it, and  
releasing it so that it snaps  
into place. Although these  
loudspeakers are designed  
as a mirrored pair, the  
decision as to which one is  
left or right will depend on  
the amount of space left  
between them.  
For stereo-only applications:  
A wider stereo image is  
presented with the  
Less than 68 feet  
tweeter/midrange array  
outboard, and a tighter image  
is presented with the array  
inboard.  
More than 68 feet  
For home theater applications:  
This placement provides a  
wide spread in sound,  
supplemented by the center  
channel speaker.  
0-2 ft.  
3
 
S P E A K E R C O N N E C T I O N S  
CONNECTION TIPS  
RIGHT  
LEFT  
+
+
+
+
Speakers and electronics  
terminals have corre-  
sponding (+) and ()  
terminals. It is important  
to connect both speakers  
identically: (+) on the  
speaker to (+) on the  
amplifier and () on the  
speaker to () on the  
amplifier. Wiring out of  
phaseresults in thin  
sound, weak bass and a  
poor stereo image. With  
the advent of multichannel  
Receivers Speaker Outputs  
surround-sound systems,  
connecting all of the  
speakers in your system  
with the correct polarity  
remains equally important  
in order to preserve the  
proper ambience and  
directionality of the  
the pass-through hole in  
the center post is visible  
under the collar. Insert the  
bare end of the wire  
through this hole; then  
screw the collar down  
until the connection is  
tight. The hole in the  
program material.  
center of each collar is  
intended for use with  
banana-type connectors.  
To use the binding-post  
speaker terminals,  
unscrew the collar until  
MODELS: S310II, S312II  
These models feature four  
rubber feet that enable  
them to be placed on a  
smooth-surfaced floor,  
such as tile or hardwood.  
Four metal spikes are  
supplied for use when the  
speaker is to be placed on  
a carpeted surface to  
are screwed in completely  
for stability.  
wall behind them, using  
the same procedures and  
hardware customary for  
anchoring bookcases and  
wall units. Customer is  
responsible for proper  
installation and proper  
selection of hardware.  
NEVER drag the speaker  
to move it, as this will  
damage the spikes, the  
feet and/or the wood  
cabinet itself. Always lift  
the speaker and carry it to  
its new location.  
decouple the speaker from  
the floor and prevent  
MODELS: S26II, S38II  
CAUTION: Floorstanding  
(tower) loudspeakers have  
a high center of gravity  
and may become unstable  
and tip over during  
earthquakes or if rocked,  
tipped or improperly  
positioned. If this is a  
The supplied self-adhesive  
felt pads may be attached  
to the bottom corners of  
your speakers to protect  
your furniture.  
unwanted damping. To  
insert the spikes, gently lay  
the speaker on its side (not  
its front or back) on a soft,  
nonabrasive surface. Each  
spike screws into the  
threaded insert in the  
center of each rubber foot.  
Make sure all four spikes  
concern, these speakers  
should be anchored to the  
4
 
T R O U B L E S H O O T I N G  
If there is no sound from  
any of the speakers:  
i.e., the speaker that was  
not working still has no  
your system for use with  
digital .1surround  
sound and the speaker that formats.  
was working is still fine. If  
Check that receiver/  
amplifier is on and that a  
source is playing.  
the problem is in the same  
If there is no sound from  
place, the source of the  
problem is most likely with  
your receiver or amplifier,  
and you should consult the  
owners manual for that  
product for further  
information. If the problem  
has followed the speaker,  
consult your dealer for  
further assistance or,  
if that is not possible,  
visit our Web site at  
Review proper operation  
of your receiver/amplifier.  
the surround speakers:  
Check all wires and  
connections between  
receiver/amplifier and  
speakers. Make sure all  
wires are connected.  
Make sure none of the  
speaker wires are frayed,  
cut or punctured.  
Review proper operation  
of your receiver/amplifier  
and its surround sound  
features.  
If there is no sound  
coming from one speaker:  
Check the Balance”  
control on your  
receiver/amplifier.  
Check all wires and  
connections between  
receiver/amplifier  
and speakers.  
information.  
Make sure the movie or  
TV show you are watching  
is recorded in a surround  
sound mode. If it is not,  
check to see if your  
Make sure no wires are  
touching other wires or  
terminals and creating a  
short circuit.  
If the system plays at low  
volumes but shuts off as  
volume is increased:  
Make sure all wires are  
connected. Make sure  
none of the speaker wires  
are frayed, cut or  
receiver/amplifier has  
other surround modes you  
may use.  
Check all wires and  
connections between  
receiver/amplifier  
and speakers.  
In Dolby Digital or DTS  
punctured.  
mode, make sure your  
receiver/processor is  
configured so that the  
surround speakers are  
enabled.  
Review the operation of  
your DVD player and the  
jacket of your DVD to make  
sure that the DVD features  
the desired Dolby Digital or  
DTS mode, and that you  
have properly selected  
that mode using both the  
DVD players menu and the  
DVD discs menu.  
Make sure all wires are  
connected. Make sure  
none of the speaker  
wires are frayed, cut or  
punctured.  
®
In Dolby* Digital or DTS  
mode, make sure that the  
receiver/processor is  
configured so that the  
speaker in question is  
enabled.  
If more than one pair of  
main speakers is being  
used, check the minimum  
impedance requirements  
of your receiver/amplifier.  
Turn off all electronics  
and switch the speaker in  
question with one of the  
other speakers that is  
working correctly. Turn  
everything back on, and  
determine whether the  
problem is in the same  
place, i.e., the speaker that  
was working previously  
now has no sound and the  
speaker that was not  
working now sounds fine;  
or whether it has moved,  
If there is no (or low) bass  
output:  
Make sure the polarities  
(+ and ) of the left and  
right Speaker Inputsare  
connected properly.  
Consider adding a  
powered subwoofer to  
5
 
S P E C I F I C AT I O N S  
S26II  
S38II  
Description: 2-Way 6" bookshelf  
3-Way 8" horizontal/vertical,  
mirror-image bookshelf  
Maximum Recommended  
Amplifier Power**: 150W  
175W  
Nominal Impedance: 8 Ohms  
Sensitivity (2.83V/1m): 87dB  
8 Ohms  
89dB  
Frequency Response (3dB): 48Hz 20kHz  
Crossover Frequency(ies): 2000Hz  
45Hz 20kHz  
800Hz, 3200Hz  
High-Frequency Transducer: 1" Pure-titanium dome, with  
rubber surround, shielded;  
1" Pure-titanium dome, with  
rubber surround, shielded;  
Elliptical Oblate Spheroidal™  
(EOS) waveguide  
Elliptical Oblate Spheroidal™  
(EOS) waveguide  
Midrange Transducer: NA  
4" PolyPlas(polymer-coated  
cellulose fiber) cone, rubber  
surround, shielded; Linear Field  
Proximity(LFP) bezel  
Low-Frequency Transducer(s)  
:
6" PolyPlas(polymer-coated  
8" PolyPlas(polymer-coated  
cellulose fiber) cone, rubber  
surround, SFG , magnetic  
cellulose fiber) cone, rubber  
surround, SFG , magnetic  
shorting rings, high-temp  
oversized Kapton voice coil,  
shorting rings, high-temp  
oversized Kapton voice coil,  
®
®
HeatScapemotor structure,  
HeatScapemotor structure,  
cast-aluminum baskets, shielded  
cast-aluminum baskets, shielded  
Baffle: Low Diffraction, IsoPower™  
Port: FreeFlowflared  
Low Diffraction, IsoPower™  
FreeFlowflared  
Network: Straight-Line Signal Path(SSP) Straight-Line Signal Path(SSP)  
Terminals: All-metal, gold-plated, 5-way  
All-metal, gold-plated, 5-way  
binding posts  
binding posts  
Dimensions (H x W x D): 17" x 9-1/2" x 9-1/2"  
In horizontal configuration:  
11-1/2" x 17-1/2" x 11-3/4"  
292mm x 445mm x 298mm  
432mm x 241mm x 241mm  
Weight per Speaker: 22 lb/10kg  
28 lb/12.7kg  
6
 
S310II  
S312II  
Description:  
3-Way 10" floorstanding  
3-Way 12" floorstanding  
Maximum Recommended  
Amplifier Power:**  
200W  
250W  
Nominal Impedance:  
Sensitivity (2.83V/1m):  
8 Ohms  
8 Ohms  
91dB  
92dB  
Frequency Response (3dB):  
Crossover Frequencies:  
High-Frequency Transducer:  
37Hz 20kHz  
850Hz, 3500Hz  
35Hz 20kHz  
750Hz, 3000Hz  
1" Pure-titanium dome, with  
rubber surround, shielded;  
Elliptical Oblate Spheroidal™  
(EOS) waveguide  
1" Pure-titanium dome, with  
rubber surround, shielded;  
Elliptical Oblate Spheroidal™  
(EOS) waveguide  
Midrange Transducer:  
4" PolyPlas(polymer-coated  
cellulose fiber) cone, rubber  
surround, shielded; Linear Field  
Proximity(LFP) bezel  
4" PolyPlas(polymer-coated  
cellulose fiber) cone, rubber  
surround, shielded; Linear Field  
Proximity(LFP) bezel  
Low-Frequency Transducer(s)  
:
10" PolyPlas(polymer-coated  
12" PolyPlas(polymer-coated  
cellulose fiber) cone, rubber  
surround, SFG , magnetic  
cellulose fiber) cone, rubber  
surround, SFG , magnetic  
shorting rings, high-temp  
oversized Kapton voice coil,  
shorting rings, high-temp  
oversized Kapton voice coil,  
®
®
HeatScapemotor structure,  
HeatScapemotor structure,  
cast-aluminum baskets, shielded  
cast-aluminum baskets, shielded  
Baffles:  
Port:  
Low Diffraction, IsoPower™  
FreeFlowflared  
Low Diffraction, IsoPower™  
FreeFlowflared  
Network:  
Terminals:  
Straight-Line Signal Path(SSP) Straight-Line Signal Path(SSP)  
All-metal, gold-plated, 5-way  
binding posts  
All-metal, gold-plated, 5-way  
binding posts  
Dimensions (H x W x D):  
Weight per Speaker:  
38" x 13" x 12-1/2"  
965mm x 330mm x 318mm  
41" x 14-3/4" x 12-1/4"  
1041mm x 375mm x 311mm  
55 lb/25kg  
77 lb/35kg  
All features and specifications are subject to change without notice.  
*Trademark of Dolby Laboratories.  
DTS is a registered trademark of Digital Theater Systems, Inc.  
**The maximum recommended amplifier power rating will ensure proper system headroom to allow for  
occasional peaks. We do not recommend sustained operation at these maximum power levels.  
7
 
O W N E R ’ S G U I D E  
P R O S O U N D  
C O M E S H O M E ™  
P R O D U C T L I N E :  
STUDIOSERIES  
JBL Consumer Products  
M O D E L  
N U M B E R S :  
S26II, S38II, S310II, S312II  
250 Crossways Park Drive, Woodbury, NY 11797  
8500 Balboa Boulevard, Northridge, CA 91329  
800-336-4JBL (4525) (USA only)  
D E S I G N G O A L : Bring the thrill of live performance and movie sound to  
the home environment by calling on JBL’s professional engineering leadership.  
T W E E T E R T Y P E : Pure-titanium dome with EOSwaveguide  
W O O F E R T Y P E : Cast-aluminum basket with HeatScapemotor structure  
C R O S S O V E R N E T W O R K : Straight-Line Signal Path(SSP)  
P O R T D E S I G N : FreeFlowflared  
©2001 JBL, Incorporated  
JBL is a registered trademark of JBL, Incorporated.  
Part No. 338018-001  
P R O F E S S I O N A L R E F E R E N C E : Studio Monitor  
 

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