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TOPIC: continous output 500kHz and ca. 500mV

continous output 500kHz and ca. 500mV 5 months 1 day ago #31879

  • Kunzmann
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Dear community
All four (i have two PWR-ICE 125 and two PWR-ICE 250) of my PWR´s have an output of ca. 500kHz and about 500mV measured with an oscilloscope.
I think this is the the triangle square (or saw tooth) pulse generator of the ice power class D module. But i thought there is a low pass filter before the speaker outputs ? Regardless of any Input (or no Input all) there is always this ca. 500 kHz signal.
Two questions:
This means the all speakers will be loaded at any time with this signal. Will be there any problems with magnetostatic or electrostatic tweeters ?
Is it possible to built a low pass filter to stop this signal from the speakers output?
Or all of my four PWR´s are damaged?
Thanks for helping
P.S. in principle all four PWR working perfect.
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continous output 500kHz and ca. 500mV 5 months 22 hours ago #31891

  • dreite
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That's perfectly normal for this type of amplifier.
You could filter the output further if you like......but I don't think it's necessary.

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