My front after market speakers went dead in my 86 roc.i replaced head unit still not working.bypassed the stock plug(radio was replaced already and has stock plug harness installed) still nothing.the kenwoods i first put in went south after a year.they were blown.put in polks 2 years ago now these are just dead.whats the deal?could the wires just go bad after time? What could it be?

 

I run sony speakers in the dash of my 86 IROC and after 5 years they still rock.have you got them hooked up right? do you have a amp that may be over powering them?

 

I've read just as much saying an UNDERpowered amp is harder on speakers... Turn up the volume, run out of power and into clipping, and that is what likely blows speakers. Of course driving a 50w speaker with a 100w amp is bad too!

 

Well, we have 3 things here. Speaker, a run of wire, and a head unit. Couple of tests will determine exactly where the fault is. You said the head unit recently replaced, so in theory it should be good, however if a speaker went bad, or worse, if the wire is shorting out somewhere, the front outputs of the head unit may also fail.

So, first I would check the outputs of the front channels. Disconnect all 4 channels of the stereo. Connect one front channel output to a known working rear speaker. Does it play? If yes, that channel is good, try the next one. If no, then you have a problem with the head unit.

Ok, so both front channels are tested and known to be good. Next, lets test the wire to the front speakers. Best way is to take a multimeter and test for continuity. Measure the resistance of each wire to find if there are any breaks. Test all 4 wires, both positive and negative for each speaker. If the wires are bad, run a new length of wire from which ever side is known to be bad.

So, the wires are ok and the head unit is ok. So that only leaves the speakers themselves. Try them outside the car on a different audio source, a home theater, boombox, anything that you can connect a speaker to. Just keep the volume very low and listen for sound. If it plays clear sound, it is most likely still good. If the speakers are bad, thats really tough to say how they went bad in such a short time.

 

No amp to the front speakers.ill will run those tests.i have a feeling they are blown. It will be the second set in like 3 years. Thanks for help third genners!!!

 

its usually distortion that blows speakers even if its not on an amp.