[Phil Allison[_4_]]

wrote:


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.


** Not a simple thing to do ...

Bottom line, try very hard to avoid speaker lines and mic lines
in the same snake. It definitely can easily damage the amplifier.



** Glad to hear you took the advice and tried using the snake in test situation rather than at a gig.

I did a bench test with a 1m length of figure 8 speaker cable running alongside a balanced mic line and found that while cross-talk was only minor at audible frequencies it could became severe at 70 kHz or so depending on the mic cable in use.


..... Phil