Kyle
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Feb 13, 2017

In the case of instantaneous power failure, how does PowerMatch react?

I wanted to make public this question that some folks have been wondering about:
In the case of instantaneous power failure (complete loss of AC mains) , how long will the PowerMatch keep its power? The dealers are asking any detailed time such as 100ms?

The PM8500, starting at 120V, with 1/8th power pink noise on all channels, had the following performance:

1. With voltage dips of 30 percent (to 94VAC) , the test unit showed no interruption of audio for any dip up to 2.5 seconds (longest tested).
2. With voltage dips of 60% (to 44VAC) to 100%(0 VAC), the unit showed no interruption for dips up to about 8 msec.
3. For dips of 60% to 100% of length from 8 to about 800 msec, The PM8500 stopped audio and resumed when the power came back.
4. For dips >800 msec, the PM8500 stopped audio and resumed after reinitializing.

Starting with 230 V AC input, 1/8th power:
1. No interruption of audio for dips of 30% or 60%
2. Dips of 100% had similar performance to the 120V case.

Please note:
• These are typical numbers, not guaranteed numbers.
• Results will be worse if delivering more than 1/8th power to the speakers.
• Expect better results for 250W models
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Asad-at-LC_Acou
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Oct 1, 2008

Re: In the case of instantaneous power failure, how does PowerMatch react?

This is helpful. Thanks for sharing.