Crown XLS 1000 Series, Руководство по обслуживанию

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NEW XLS series Overview Page 5 of 6
The amplifiers output stage can recycle reactive load energies that are normally wasted as
heat in the amplifiers output stage. You can see the Reactive power out is 346W or VA
and the power consumed by the amp is only 114W. That is because the amplifier is
recycling the power. You wouldn’t dare run a Linear Class AB amplifier into this load.
Peak load currents are occurring at amp out Voltages near zero. The dissipations would
be very high. Here I am driving very low frequencies into a large 60hz transformer and
since I am less than 30hz the transformer is starting to saturate. As denoted by very large
currents when amp out is at 0V. For most amps this is a very brutal if not damaging test.
This plot was from an XLS1800 running at just under Extreme current protection
shutdown. That briefly shuts amp down and then restarts and continues to run if
conditions have improved. This ran like this overnight without shutting down.