Originally Posted by yellow98stang
My amp blew out on my a3-300, and now I need some info/help...
I noticed the amp started making some clicking noises about a month ago, then this past weekend, it started making a rattling/popping sound and then came the nice burnt electronics smell.
Not sure what all these boards, chips, etc. are but the black rubber shielded coil is what i found fried...
Any plug and play replacement amps that will work? How can I tell if the woofer itself is damaged as well?
your coil is not fried. that is the standard black rubberized glue that is on all of them to hold the coil in place. i have seen a few ( out of hundreds ) that the coil did overheat, and needed to be replaced, but that is extremely rare.
sounds like your speaker was on it's way out a month ago. i have heard that same story from quite a few people that have sent amps to me. funny noises, then pop. speaker takes out amp. a few have ripped the speaker apart, and found that the voice coil had actually come unglued from the cone. when it starts rubbing on the sides of the magnet and making funny noises, it shorts out and pops the output section of the amp.
you can replace the amp with whatever you want.... but without taking care of the real problem, it will just blow up immediately. careful... some of the popular amps people like to suggest, are much worse than the eD amps... i work on those too. i know... people think the eD amps were unreliable... but it really turns out that the crap speakers cause them to blow up. no amp in the world can survive a shorted voice coil. the Bash amp in my Klipsch has blown up 4 times... but... i admit, i abuse that thing. that said, i have been heavily abusing two LT500's for the past month and they are ok so far.
anyway, take a multimeter and measure the speaker at the wires going to the amp. ( with amp disconnected ) you should measure from 4 to 5 ohms. my bet, is you are going to measure much less.
also, lightly push on the cone of the speaker and see if it moves freely, or if it is scratchy.