JBL LSR25P, Руководство пользователя

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By now, you have probably plugged the LSR monitors in and are making great
music. However, for optimum performance, some attention to wiring details now can
reduce system degradation later. These cabling recommendations follow standard wiring
practice for balanced and unbalanced inputs.
Balanced Sources
The best way to run your system is balanced, where both “HOT” (+) and
“COLD” (-) signals are supplied, as well as a GROUND/SHIELD. These are typically car-
ried on 2 conductor shielded cables with XLR connectors on both ends. Whenever possible,
the cable shield should not be connected to any signal pin, but left to perform a cable
shielding function only.
Note: Under no circumstances should the safety ground wire be removed from the AC
power connector.
When using balanced sources with the LSR25P, it is recommended to use the
XLR input on the LSR25P. This maintains a balanced signal and is the best way to reduce
the possibility of hum or other interference
For balanced sources, the HOT (+) signal from your source should be connected
to Pin 2 of the XLR input as shown in Diagram A. The “COLD” (-) signal should be con-
nected to Pin 3 of the XLR. To avoid ground loops, connect the SHIELD at the source end
but not at the LSR input.
Diagram A
The LSR25P was designed to output a level of 96 dB SPL at 1 meter with a
+4 dBu signal applied to the XLR input. If additional gain is required from a balanced
output, Diagram B can be used with the RCA input. The sensitivity of the RCA input is
approximetly 12 dB higher than the XLR input.
12
Appendix A: Wiring Recommendations
+
-
+
-
Pin 2
Pin 3
Pin 1
Pin 2
(Tip)
(Ring)
(Sleeve)
Pin 3
Pin 1
LSR25P XLR Input Balanced Source