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Fried xover connecting scope
Fried xover connecting scope
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Old 9th June 2020, 12:25 AM   #1
foranobject is offline foranobject  Canada
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Default Fried xover connecting scope

Playing sine wave into xover. Output of xover connected to scope channel 1 and input to amp. When I connected channel 2 to amp output, something fried in the xover. Why?
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Old 9th June 2020, 12:32 AM   #2
rayma is offline rayma  United States
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Is this an electronic crossover? Were both of the probe ground clips connected to ground?
Is the amplifier's output bridged, or ground referenced?
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Old 9th June 2020, 12:55 AM   #3
foranobject is offline foranobject  Canada
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It is (or was) a DSP crossover. I connected the scope ground of channel 1 to the shield of the XLR output on the xover. I connected channel 2 ground and signal to speaker wire coming out of the amp.
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Old 9th June 2020, 01:13 AM   #4
Mark Tillotson is offline Mark Tillotson
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The output will be bridged - you should never assume any speaker output is ground, some are, some aren't, and black/red colour code does not imply black is ground. Hopefully its just a fuse you have to replace.
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Old 9th June 2020, 01:47 AM   #5
rayma is offline rayma  United States
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Unbalanced probes should not be used for floating measurements (except under very
specific conditions, by an expert). There's a good reason it's called a "ground clip".
 

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