PLD Series Amplifiers 5
Application Guide—Portable PA Rev. E, Apr. 2015
1. Introduction
Why PLD?
The role of a power amp is simple: the proverbial function is a virtual straight wire with gain. Take the input signal and
make it bigger to push a loudspeaker. Given this, you certainly might be forgiven for thinking that big amplifier innovation
ended some years ago. And to be honest, power amps in recent years have increasingly met levels of performance and
reliability that were impossible some 20 or 30 years ago.
The PLD Series amplifiers from QSC take it all a few steps further while adding such versatile features as digital signal pro-
cessing, Flexible Amplifier Summing Technology™ (FAST), and particularly high power and channel density.
The three models in the PLD range are the PLD4.2, the PLD4.3, and the PLD4.5. All are four-channel amplifiers, though
those four channels can be configured and combined in different ways to make one, two, three, or four channels, all in a
two-rack-space package.
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