smoking amp

1.  Could be many different answers for this one.  Most common is a the left leg of one of the Mosfet power supply transistors broke from vibration. When the gate leg breaks, the Mosfet turns itself on at full throttle, this in turn will take itself out and destroy the others that are paralleled with it.

2. I highly doubt that your RCAs could cause this problem.

3.  Without knowing what caused your problem, this one is very hard to answer.

If you take the amp apart, you should be able to see if the left leg of one of the FETs had broken from the case of the transistor.  Look closely at the one that is the most damaged.

(IAmAnIdiot) <- lol not really.

thanks for your input. that was the only possibility that i was thinking, the amp came out of a ford focus with 2 12s, so im guessing the guy probably had the amp mounted to the back of the speaker box, so my guess was a solder from the inside may have broken, just had no idea which component. i can take a picture of the inside of the amp if you would like. so you can tak a look at the inside components.

(ianarian)

the amp was not brand new. it was purchased from a friend. worked fine for him for about 8 months. sold the car so got rid of the system.

i grounded the amp to below the rear seat to the metal. used a wire brush to take off all the paint n primer.

speaker connections could definitly be a possiblitiy inside the speaker box to the speaker. the connections are not too good and the wire was fairly thin.

A bad speaker connecton would increase the impedance of the final load.  This would be easier on the amp. 

Yes a broken solder joint could cause this too.  It would have to be on the leftmost leg of the transistor.  When they explode, the right side and the center usually take the grunt of it.  You should be able to see a bad joint or a broken leg of the device.  Sure a pic would allow me to point out where you need to check.

The bad connection I was refering to has nothing to do with electromagnetism or irregularity.  A mosfet transistor is either on or off.  This is controlled by the Gate connection.  If the gate of the FET loses it's connection from the drive input, it simply turns on wide open and will always take itself out.