[Elecraft] Huge audio burst

[Jack Colson]

I juat experienced what others have mentioned on this reflector. 
Fortunately I was using speakers, it came out of no where, the K3 was in 
the NR mode and I had changed it from 1-4 to 2-3 and back.  Suddenly, 
BAM!  It actually was so loud that it was scary.  I had the AFX mode on.
My first guess was it had something to do with the NR.
Firmware version 3.52
73
Jack, W3TMZ