XTA DPA SERIES, Руководство оператора

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DPA Series — DPA80/DPA100 Operating Instructions Page 13
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About Your Amplifier: Dynamic Amplifier Performance Measurements
The DPA Series amplifiers are the very latest examples of a ‘dynamic amplifier’. This new
‘breed’ of power amplifiers provide very high peak power levels in a much smaller, and
lighter, package than previously possible with conventional amplifiers.
They are designed specifically for today’s high power audio installations, which use multiple
speakers with electronic crossovers or speaker controllers. These systems can handle very
high transient signals that far exceed their RMS power rating. The DPASeries amplifiers have
been designed to match this requirement and can deliver huge levels of power for short
durations.
In order to protect themselves and the loudspeakers that they are driving, continuous signals
such as sine waves, are automatically detected and reduced (ramped down) to a safe level.
When trying to
measure the power output
however, continuous signals will give totally
incorrect results. A dynamic signal, such as a tone burst, should be used and the levels
measured by monitoring the waveform on an oscilloscope. The power envelope can then be
accurately measured.
Our power output figures are measured using signals with known Crest Factors and are
quoted at the rear of this manual on page 63 and on our website.