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Neil
Neil, Engineer
Category: Car Electronics
Satisfied Customers: 3735
Experience:  NZCE Electronics and Computing
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I've got a Kenwood that is flashing Protect even when

Customer Question

I've got a Kenwood that is flashing Protect even when speakers disconnected. Speaker wires show continuity as well as the harness adapter. Cant find anything wrong with the speakers. They are new with the unit.
Submitted: 1 year ago.
Category: Car Electronics
Expert:  Neil replied 1 year ago.

Hi

The Protect has two functions... One is to protect the amp if one of the speakers has a short, the other is to protect the speakers if the output stages fail and put DC onto the speakers (which will destroy them). Do a power down reset (remove the power plug from the wall two minutes and repower, if still going into Protect with no speakers connected then check carefully around the speaker connections for any strands of wire that may have come of a cable and be shorting to chassi. If nothing then the output stages may need replacing, you would need some expertise to service this...

Customer: replied 1 year ago.
Okay, will check connections again. Continuity is good from harness to speakers. Would a blown speaker still show continuity?
Expert:  Neil replied 1 year ago.

If the amp is going into protect without the speakers connected the problem is not the speaker...

Yes a shorted speaker will show continuity... It should be no LESS than 4 ohms typically so you will need a good meter to to do a proper test of the speakers...