The Art of Reliable Design
Protecting the entire amplifier without
compromising performance is the essence
of professional audio design.
PL3 Series amplifiers are protected
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 constants. Do you need
"last resort" clip limiting with a very fast
time constant that won't affect program
dynamics? PL3 Series amplifiers give
you that choice as well.
Over-Current Protection
Patent-pending circuitry in the PL380
measures 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 extreme, 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's PowerLight
supply can draw up to 100A at 120V.
To protect internal fuses, distro breakers,
and power supply components,
the system limiting will cut long term
currents to 30A. AC protection does
not occur on normal program material,
even when the amplifier is driven into
frequent clipping.
All PL3 Series amplifiers have relay-bypassed
inrush limiting to keep turn-on
surges from exceeding normal operating
current loads.
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High Frequency Protection
Most switchmode amplifiers mute when attempting to reach full power at 20 kHz, especially into low-impedance loads. The PL380'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. |
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DC Fault Protection
In the event of a DC fault, the PL380'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. |
