I highly doubt that the speakers are ruined, most likely there is something wrong with the receiver. Are you sure you have the speaker wires hooked up correctly, possitive to possitive and negative to negative? Usually if you have the wires hooked up wrong, the entire receiver will shutdown into protective mode, so I am guessing that is not the problem.
What surround mode are you using, Dolby Digital, PLIIx, etc.? Again, to me it sounds like your receiver may be bad. Where did you purchase the system from, can you take it back?
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