JBL LSR4312SP Owner's Manual page 27

Below is a summary of the functions of the six DIP switches:
DIP switch number
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1
2
3
4
5
6
* Set DIP switches 3 and 4 both ON to select both the left and right channels.
The subwoofer rear panel LFE/Bass Mgmt DIP switch setting is ignored when the input source is set
to Analog.
When the subwoofer rear panel LFE/Bass Mgmt DIP switch is set to LFE and the input source
selection is either S/PDIF or AES/EBU, the Low Pass fi lter setting for LFE is applied, the front panel
Bass Management ON function is disabled and bass management cross over fi lters are not used.
(High Pass fi lters in LSR4328P and LSR4326P are not enabled).
When the Subwoofer rear panel LFE/Bass Mgmt DIP switch is set to Bass Mgmt, and the input source
selection is S/PDIF or AES/EBU, when the front panel Bass Mgmt ON function is not active, there will
be no output from the Subwoofer.
X
If only one LSR4312SP subwoofer is being used, make sure that only the fi rst DIP switch (SUB1) is in the ON
(right) position. If two LSR4312SP subwoofers are being used, one should be set to SUB1 and the other set to
SUB2; if both switches are placed in the ON or OFF position, all fi ve LEDs will strobe and all buttons will blink,
indicating an error condition.
X
When either the S/PDIF or AES/EBU input is selected, DIP switch #3, for channel A, or, #4, for channel B, or
both must be enabled or an error message will be displayed on the meter display.
Function
Sets the subwoofer ID to SUB1
Sets the subwoofer ID to SUB2
Selects the left (CH A) digital input*
Selects the right (CH B) digital input*
Selects either LFE or Bass Management when using digital inputs
Sets polarity to either 0° or 180° - enabled only when RMC is not being used.
See page 25 for more information on subwoofer polarity.
Reference - Rear Panel
21