I'm in no way blaming the player so much as letting people on the board know of a possible situation.
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I am not questioning your assertion that your speakers were damaged. After all, you were there!
They are definitely toast & even smell like burnt toast:). They won't even try to make a sound, I did a little autopsy on them the coils are melted together good. I swapped speakers for some older ones & they played fine in the car.
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But the way the empeg works, as the battery voltage drops, the player continues to work just fine until the voltage drops to (someone correct me if I am wrong here) somewhere around 10-11 volts, then it shuts off cleanly, turning off the amplifiers when it does so.
Would it do that if the player was on AC? Even though I'm still not convince the player was on AC just for the fact my system would simply be unbearable sound wise for no one to hear it at full volume. Someone would've complained about it, the landlord is just 50' away. The only reason I knew it was my car is I recognized a mix song that nobody would have at the end of the playlist, so I knew approximately how long it had been playing by that. I know I've had problems w/the remote not working when the sun hits it at my back I have to shield the sun off the sensor to get it to work so the sun's IR rays could trigger it if the leaves flickered just right, consider that any button will wake the player the code possibilities are greater. I know this sounds impossible but it sounds more plausible in my situation. I'm aware it would have to have the right sequence of pulses in order for this to happen I don't know what the wake pulse code would look like but I can definitely see this happen.
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Why would low voltage to the amps cause damage to the speakers in any case?
Yes under powered (distorted from over driving to achieve same volume) amps can kill a speaker quicker than just over powering them can if the signal is dirty (distorted from low power). It is always better to have an amp that rated higher than your speakers. I did have the stereo playing fairly loud the night before this happened so I imagine the low voltage going thru the amps was'nt very clean. My player will go off for awhile then come back on repeatedly in low voltage situations, I've had that happen before when the alternator was too small to keep up the battery. It has never shut completely off. I suppose this is why it kept playing when the battery was too low. I remember hearing the sound cut in & out just before I opened the car door to stop it. I wish I would've had the presence of mind to check the AC/DC status. I have never had the AC switch fail before and if it's a matter of thermal causes then I would certainly dismiss it as a cause because temps here are below freezing at the moment. Wouldn't the heat have to get to the back of the player to trigger the switch?
Irregardless I'm going to take the steps you mention Tony to prevent it from happening again luckily the speakers were'nt the most expensive & I was thinking of upgrading them soon as it was so at least they weren't the new ones that got fried.
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