PA 400
PA 800
PA 1000
PA 1600X
USER’S MANUAL
In choosing a power amplifier from the LD Systems' PA series range, you have chosen a power
amplifier designed using traditional, reliable technology with a conventional toroidal
transformer power supply, but super-fast, latest generation high-performance bipolar
transistors. With the exception of the PA400, all amplifiers operate in Class H mode, i.e., the
operating voltage changes depending on signal level. This improves efficiency as the power
amplifier gives off substantially less heat. The circuit is completely balanced with a feedback
of only 20 dB, resulting in a very fast amplifier with only slight distortion. In particular, the
rough, unpleasant sound associated with TIM distortion is suppressed. Of course the
amplifiers feature all of the standard protection circuits including a clip limiter.
Summary of Contents for PA 400
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