JBL SRX900 Series, Руководство пользователя

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User Manual
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9 - AUDIO CONNECTIVITY
SRX900 products are equipped with a balanced line level analog input for interfacing with external audio equipment such as mixing
consoles. The balanced line input can accept signals of up to
+21 dBu and has an input impedance of 100 kOhm . The male XLR output
connector allows multiple loudspeakers to be connected together from a single output. The output connector is wired directly to the
input and continues to function under a power loss condition.
9.1 REAR PANEL AUDIO LEDS
Two LEDs are available on the rear panel to provide visual feedback on system drive. The Signal LED turns green when signal level
higher than -60 dBu is applied at the input, and red when the input signal is clipping the input. The Limit LED turns orange when limiting
is engaged on one or both amplifier channels (LF/HF) to protect the transducers and or amplifiers. This LED is linked to the DSP-based
LevelMAX
TM
limiter and can be activated by the Peak, RMS, or thermal limiter. Limiting is not uncommon and will not damage the trans-
ducers or the amplifier. When the Limit light is solid orange, it means that the system is being driven beyond its capacity and action
should be taken to reduce the input level.
XLR Pin Configuration:
• Pin 1: Ground
• Pin 2: Signal (+)
• Pin 3: Signal (-)
When daisy chaining multiple SRX900 devices together, it is necessary to maintain a 10x relationship between the destination and
source impedances. For example, the mixing console has an output impedance of 100 Ohms, the combined total input impedance of
all SRX900 cabinets would need to be no less than 11,000 Ohms (1 kOhm). Since the input impedance of the amplifier module is 100
kOhms, a maximum of 100 devices would be allowed on an XLR daisy chain in this example.
SIGNAL LED GREEN
SIGNAL LED RED (CLIP) LIMIT LED BLINKING LIMIT LED SOLID
XLR Input
XLR Output