Meyer Sound Stella - 4 Constellation, Руководство по эксплуатации

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CHAPTER 2: CONNECTING THE STELLA-4
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AC Power
The Stella-188 is powered on and off with the AC Power
switch.
Voltage and Load Current LEDs (1–8)
The Voltage and Load Current LEDs are useful for verifying
whether each of the eight Channel Outputs have voltage
and whether their connected Stella-4 loudspeakers are
receiving DC power and audio.
Voltage LEDs (1–8)
The blue Voltage LEDs indicate whether voltage is present
for each of the eight loudspeaker channels. These LEDs
should be lit when the Stella-188 is powered on. If a channel
is not lit, its fuse may need to be replaced. If a group of four
Voltage LEDs is not lit (either 1–4 or 5–9), one of the two
Stella-188's internal power supplies may have failed.
Load Current LEDs (1–8)
The green Load Current LEDs indicate whether a loud-
speaker is connected to the channel and receiving power.
As a channel's audio signal increases, its LED becomes
brighter. If an LED is not lit, check that the channel's Voltage
LED is lit (the fuse is working) and verify the cable connec-
tion to the loudspeaker.
Fuse Slow Blow (1–8)
Each loudspeaker channel is protected with its own fuse. A
maximum of two loudspeakers can be connected per chan-
nel; connecting more than that could cause the fuse to be
tripped. If you have to replace a fuse, make sure to use a 4-
amp, 250-volt slow-blow fuse (T4A-250V). These fuses are
available from Meyer Sound (PN 420.022).
The Stella-188 Back Panel
The Stella-188 back panel includes an AC connector, an
Audio Input connector for receiving up to eight channels of
source audio, and eight Channel Output connectors that can
deliver DC power and balanced audio to up to 16 Stella-4
loudspeakers.
AC Input
The Stella-188 has an international standard IEC-320 AC
inlet (line, neutral/line, earth). The inlet can accept different
power chord types for outlets used throughout the world.
Make sure to use the correct power chord for the AC power
in your area. The Stella-188 operates at an AC voltage range
of 100–240 V at 50–60 Hz.
Stella-188 Current Draw
The Stella-188 Power Supply presents a dynamic load to the
AC mains, which causes its current draw to fluctuate as vol-
ume levels change. Since different cables and circuit break-
ers heat up at varying rates, it is important to understand the
following types of current ratings and how they affect circuit
breaker and cable specifications.
■ Idle Current — The maximum rms current during idle
periods.
■ Maximum Long-Term Continuous Current — The
maximum rms current during a period of at least 10 sec-
onds. The Maximum Long-Term Continuous Current is
used to calculate temperature increases for cables, to
ensure that cable sizes and gauges conform to electrical
code standards. It is also used as a rating for slow-react-
ing thermal breakers.
■ Burst Current — The maximum rms current during a
period of around one second. The Burst Current is used
as a rating for magnetic breakers. It is also used for cal-
culating the peak voltage drop in long AC cable runs,
according to the following formula:
V pk (drop) = I pk x R (cable total)
■ Ultimate Short-Term Peak Current — A rating for fast-
reacting magnetic breakers.
■ Inrush Current — The spike of initial current presented
when powering on.
Stella-188 Channel LEDs and Fuses
Stella-188 Power Supply Back Panel