The emf from one speaker is certainly not the same as 36 speakers when you present that load with another load, IE:the amps outputs. Every amplifier must overcome the back emf given off the subwoofers motor(fixed magnet/coils moving makes AC volt's and amps) Normally the back emf is so little it is a non issue so that is why you never hear about it.

But when you present that wall of woofers with resonance(sound waves that they will have the most simpathetic vibrations from) that 36 motors can turn out some voltage and some nice current. Now who knows if that current was enough to overdrive the amps current output but I have seen it before. Without actually seeing what failed on the amp we can only guess as to what caused the failure.

Do this as a small test, place a sealed enclosure with a Q of .7 in your cabin with a 15 or 12 and play the note that resonates your subwoofers the most(visually) then take a multimeter and measure the output at the 36 subs speaker wire that the amp was connected to. You will see X amount of volts, you then place a resistor across those 2 wires that has the approx impedence rise of your amp/sub box then measure current output. Try it its kinda fun

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It was the power supply fets that smoked, the first 4 with the first 2 actually exploding.

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that does sound interesting! might have to try that one for myself

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DB Don... I was looking at the situation from the perspective of treating each woofer and it's enclosure as a resistor, capacitor, and inductor.... if we series/parallel 36 sets to 1ohm, I don't see the situation being much different from 4 drivers in parrallel to 1ohm...

of course power compression will be different, and thinking about it now the increased loading inside the vehicle would have to make a difference in the radiation impedance.. (increasing it)

but I just don't see a difference in the loads other then that ???





At anyrate.... if the psu Fets are what gave out, I would say that the amp could have been on it's last legs and probably didn't like the input voltage... I don't know how the amps were modded, but if it was only to disable the protection circuitry, well that does not necassarilly mean the amps will be rock solid on 16+ volts....

Don't discount the possibility of a short... you could have been drawing excessive amounts of current from amp, and the psu just happened to give out before the outputs.... clipping will also tax the psu...

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Well I decided to just go for it after a few days of deep thought and good news is the amp is fine, no problems! The bad news is I decided to turn it on inside my garage with the van doors open and it knocked the garage door off of its track and now I have quite a project ahead of me putting it back on lol. Cant wait to show it to everyone at importfest

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you should of called me. You also got to keep in mind your running bass race and your not playing 1 note. As your freq. changes that your playing so does your imped. You might be wired to 1 ohm but what is it all done just not connected to the amp? You might be at 4 ohms on one freq. but drop to .5 on another as the music plays. You have to becareful especially using small amps.

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well my 500.1 broke. I have been using it for about a week with no problems and then I was powering it up (connecting the remote wire to my battery bank) and there were two popping noises and the amp clicked into protection and goes into protection everytime I turn it on. Im purchasing a 2nd 500.1 and im gonna run them at 2ohms each to see if that solves my problem, I sure hope so. Kenny, I gotta get the van out there for you to see it, I've just been crazy busy. Im going to the dmv tommorrow to reg. it and im gonna do the maintance on it over the weekend. Got the 1 alt in but the tensioner is siezed so I had to grab a new one. Its gonna be a bitch of a job putting it on. So as soon as its ready I will swing by. I will try to call you later tonite or tommorrow.

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