JBL LSR4312SP, Руководство пользователя

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Audio Connections
The LSR4312SP subwoofer is equipped to accommodate a wide range of analog and digital signal input
sources. You can connect two digital sources and one analog source to each subwoofer and switch
between them using front panel controls, the wireless remote control, and/or LSR4300 Control Center
software.
Analog Connections
The LSR4312SP provides six discrete XLR analog inputs (Left, Right, Center, Left Surround, Right
Surround, and LFE), ensuring compatibility with both stereo and 5.1 surround sound applications and
systems. In addition, ¼” inputs are provided for the Left and Right channels. Positive voltage to Pin 2 of
the XLR connector or the tip of the ¼” jack will produce a forward motion in the speaker cone. Analog
signal sources for the Left and Right channels can be connected to either the rear panel XLR or ¼”
connector. Balanced wiring should be used. See Appendix E in this manual for wiring diagrams.
The LSR4312SP provides switchable input sensitivity b4 dBu and -10 dBV, as determined by
the two-position Input Sensitivity switch on the rear panel. When the sensitivity is set for +4 dBu, an
input signal equal to +4 dBu will produce a system output level of 94 dB SPL at a distance of one meter.
Likewise, a setting of –10 dBV will cause an input level of –10 dBV to attain the output acoustic level of 94
dB SPL at a distance of one meter. Use of the front panel Volume control (that is, pressing the +/- button
when no button is fl ashing) and/or independent subwoofer Level control allows further level matching.
Incoming analog signal is internally routed to the LSR4312SP’s high resolution 96kHz, 24-bit,
oversampling AD converters. Full-range XLR analog outputs are provided for each of the six analog
audio inputs; use these to distribute analog signal to the main speakers in your system and/or a second
subwoofer. Connect your analog audio source (mixing console, digital workstation, or other analog audio
devices) to the LSR4312SP inputs fi rst, then use the LSR4312SP analog outputs to route the signal
to the other speakers in your system. This approach allows the LSR4312SP to carry out optional bass
management if desired. Balanced wiring should be used. (See Appendix A on page 34 in this manual for
more information.)
Digital Connections
Connect digital sources in AES/EBU format to the LSR4312SP rear panel XLR digital input connector and
those in S/PDIF format to the rear panel RCA-type digital input connector. The following sample rates are
supported: 96kHz, 88.2kHz, 48kHz, 44.1kHz, 32kHz, with word lengths of up to 24 Bits.
AES/EBU and S/PDIF digital audio is transmitted as a two-channel pair on a single cable. Multichannel
digital audio devices typically provide several pairs of outputs with contiguous channel assignments
(i.e., Ch 1/2, Ch 3/4, etc.) 5.1 surround sound signal is typically transmitted over three discrete pairs,
most often “Left/Right,” “Center/LFE,” and “Left Surround/Right Surround”; however, you should always
check the documentation and system settings of the signal source to verify the assignments being
used. (Alternatively, you can use the digital outputs of an external bass management processor.) The
LSR4312SP subwoofer can reproduce signal arriving on the left (“A”) channel or the right (“B”) channel, or
it can reproduce both (for bass management purposes). The channel(s) being reproduced is determined
by the settings of the third and fourth rear panel DIP switches (see page 21 inthis manual for more
information).
Reference - Audio Connections