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The Art of Reliable Design
Protecting the entire amplifier without
compromising performance is the essence
of professional audio design.
PowerLight 3 Series amplifiers are pro-
tected against thermal overload, prolonged
over-current output, excessive AC current
draw and excessive high-frequency output.
To give you maximum headroom without
burnout, breaker tripping or other “show-
stoppers,” the system uses long time con-
stants. Do you need “last resort” clip limiting
with a very fast time constant that won’t af-
fect program dynamics? PowerLight 3 Series
amplifiers give you that choice as well.
Over-Current Protection
Patent-pending circuitry in the PL380 mea-
sures actual losses in each output FET and
instantaneously clamps peak current to safe
values. If over-currents persist, the limiter
will reduce gain to keep average current
manageable. If the input signal is so ex-
treme, or the load impedance so low, that
limiting cannot prevent excessive long-term
currents, the amplifier channel will mute
periodically to reduce average stress.
AC Current Protection
At peak output, the PL380 amplifier’s
PowerLight supply can draw up to 100 A
at 120 V. To protect internal fuses, distro
breakers, and power supply components,
the system limiting will cut long term cur-
rents to 30 A. AC protection does not occur
on normal program material, even when
the amplifier is driven into frequent clipping.
All PowerLight 3 Series amplifiers have
relay-bypassed inrush limiting to keep turn-
on surges from exceeding normal operating
current loads.
High Frequency Protection
Most switchmode amplifiers mute when
attempting to reach full power at 20 kHz,
especially into low-impedance loads. The
PL380 amplifier’s internal limiting will bring
power down to a “mere” 1000 watts in this
instance. This limiter can be observed on the
bench, but real world compression drivers
are unlikely to require these power levels.
DC Fault Protection
In the event of a DC fault, the PL380
amplifier’s PowerLight supply shuts down
instantly to protect your drivers. You may
need additional protection for compression
drivers or other loads that can’t absorb all
the energy stored in the PL380 supply.
Choose your technology, choose your
system architecture. No matter what
your choice, PowerLight 3 amplifiers will
bring ultimate performance, reliability and
design integrity.
PowerLight 3 amplifiers are
compatible with BASIS proces-
sors and the QSControl.net
network forming a compre-
hensive system incorporating
extensive DSP, digital audio
transport plus amplifier monitor-
ing, management and control.
Flexible System Architecture
Analog System Compatibility
Analog Audio
SC28
(or other analog I/O processor)
PowerLight 3 Series Amplifiers
PowerLight 3 Series Amplifiers
Additional Amplifiers
BASIS 922uz
Digital Audio
Ethernet Switch
QSControl.net
Software
With ample power and excellent
cost, weight and rack space
per watt, the PowerLight 3
Series is your best choice.
Zero-latency throughput in the
amplifier racks using QSC’s
SC28 System Controller or your
favorite DSP unit means your
meticulous system alignment
won’t be compromised.
Total Audio Networking Functionality
Additional Loudspeakers