audio system bang

[ozzy1750]

when starting my 607 the radio gives a very loud bang either right away or when the car moves off doesent do it if the radio is off when I say loud I mean loud same sound as though someone hit the screen with a baseball bat makes the wife jump. any ideas?

[CAB]

my 406 use to do it if I hit a bump in the road, first time it did it I s**t myself was doing 80ish on motorway thought I'd hit something or someone had thrown a brick at the car.
I never sorted the problem as I sold the car, but was told to try swopping earth and speaker wires around to try and cure it.

Cris.

[ozzy1750]

hi well you know what I mean then when I say it is loud. well anyway got an auto elec. to look at it turned out it was a fault with the amp cured it by cutting the feed to one speaker it,s got that many I dont miss one