Crosstalk in snake cable that include speaker cables and mic cables
I can confirm that this type snake CAN create an ultrasonic oscillation that can quickly damage a power amp.
Fortunately this happened during my testing and not during an event and it was a small amp with easy to replace 2N3055's.
I WOULD NOT use this configuration with speaker level signals in the snake.
If you MUST use it, keep the High end rolled off on the amp.
Also I found that the wires intended to be used for the speakers are shielded well enough by all the other cables that the speaker lines can be used to carry line level audio signals. There was some small cross talk between the 2 speaker cables when used as line level but this is of no issue if they are used for 2 monitor mixes for example or for left and right.
Bottom line, try very hard to avoid speaker lines and mic lines in the same snake. It definitely can easily damage the amplifier.
Mark
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