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There are several ways to connect the LSR6312SP in a
monitoring system including stereo, multi-channel for-
mats such as Dolby ProLogic, AC-3, DTS, and others.
The bass management system in the LSR6312SP pro-
vides the flexibility to switch between configurations.
In a Stereo Configuration, it is typical to feed the
LSR6312SP with the left and right channels and take
the left and right outputs from the LSR6312SP and feed
them to the satellites. The high pass filters on the sub-
woofer outputs remove the low frequency signal below
85 Hz from the satellites. This signal is then redirected
to the subwoofer.
The Dolby ProLogic format uses a similar connection
scheme to the one above. The left, center and right
channels route to the left, center and right inputs of the
LSR6312SP and through the respective outputs to the
satellites. Signals below 85 Hz are filtered out of the
satellites and sent to the subwoofer.
Other multichannel formats such as Dolby AC-3 and
DTS may include six discrete channels, left, center, right,
left surround, right surround and subwoofer. These are
termed 5.1 for the five main channels and the dedicated
"point-one" subwoofer channel, which is also called the
low frequency effects, or LFE channel. Not all program
material makes use of all channels, and mixing engi-
neers have the discretion to use - or not use - the
subwoofer channel.
The Left, Center and Right channels are routed to the respective LSR6312SP inputs and on to the front channel LCR speakers. The LFE
channel is sent directly to the Direct input of the LSR6312P. When not in bypass mode, the system operates as the stereo and Prologic
setups previously described. All subwoofer information is derived from the front channels and the Direct subwoofer input. When a con-
tact closure occurs, the high pass filtering is bypassed to the satellites and the satellites then receive the original full range signal. The
sub-woofer feed from the Direct LFE input remains active.
13
LSR6312SP Powered Subwoofer System
makeup
gain
plug
Summed
Out
Figure J
JBL PROFESSIONAL
Serial No:
Assembled in USA
WARNING
AVIS!
!
SHOCK HAZARD DO NOT OPEN
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
See Owners Manual for Set-up and Safety Precautions
WARNING: To Reduce Risk of Fire or Electric Shock
Do Not Expose This Equipment to Rain or Moisture
p
I
0
Nominal Configuration
Input Sensitivity: -10dBV
Bass Alignment:
Flat
Polarity: Normal
RMC: Defeated
Make-up
Gain
RMC
Remote
Bypass
Switch
RMC
Width
Depth
Frequency
24
Hz
96
Hz
0
-14
dB
0
+ 6
dB
See RMC Instructions before enabling
Bypass
LCR
Closed Contact: L-C-R Signals
Pass Straight Through Without Filtering
Sub Driven by "Sub-Direct" Input Only
Open Contact: L-C-R Signals
High Passed. Sub Driven by Summed Low
Passed L-C-R Signals plus "Sub Direct"
Out
Summed