[1000mp] speaker RF

[ROBERT SCOTT]

Hi All
      I have a problem with RF feedback coming through
the SP8 speaker, I can hear my voice coming through
and sometimes I can hear cracks and bangs coming
through as well.
My SWR is 1.1 as I use a 5 band beam (MA5B) I ave
everything well grounded and I have tried different
mics but no good.
I hope someone can give me some idea's and thanks.
                Robin MI5RJS

Robert J Scott