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What would cause this to happen to a preamp?

Yesterday I was at a friends house listening to his system. At one point we noticed that the soundstage shifted left a bit so my friend decided to check the xlr connection to his amp. While the music was still playing, he jiggled the xlr cable at the amp which caused a brief sizzling sound in the preamp. The preamp then shut down. Obviously we were pretty bummed out and concerned. Pushing the power button on the preamp would not power it up. We checked the fuse and it was fine. We then tried disconnecting the power cord and reconnecting it. The preamp then powered up fine. We listened for a few more hours and it sounded fine. So my question is...

Why would "jiggling" the xlr cable at the amp cause the amp to shut down? What happened? Some sort of short?

Thank you...
tboooe

Showing 2 responses by tboooe

tboooe's avatar
tboooe OP
1,009 posts
 
Thanks for the responses. Yes, I am talking about the power cord that connects to the wall and preamp with an IEC connector. The cord is no where near where the amp is so I do not think that my friend touched it.

I wonder if the XLR is defective somehow. Maybe by jiggling it he caused a short of some kind???? Seems strange to me the just jiggling the IC would have an affect like this unless a short was caused....
tboooe's avatar
tboooe OP
1,009 posts
 
nsgarch, the amps are connected to the preamp via a trigger.
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