I have a pionner d3 in my nissan 350z and i noticed 80% of the time my sound cuts out every 7 seconds. I thought at first it was my cd player but then i switch to the radio and it now does that. Its cuts out completly then plays again. Any ideas?

what sound system?

as far as speakers its polk compent and 2 alpine type r and 1 alpine mono amp and 4 channel