Why did the Rockford fry?

I just fried an amp, to the point that it was smoking from the inside out, & I have no idea why.

I previously had two Rockford 300s amps (One bridged mono to an MTX sub pushing 300w RMS, the other running to a pair of Pioneer 6x9's pushing out 75w x 2 RMS). I purchased an Audiobahn AW1200Q (4 Ohm DVC, 700w RMS), & bridged each amp to a single voice coil, feeding it 300w RMS per coil, 600w RMS total. When I turned it up, the 30 amp fuse in my dist. block popped (30 amp is the recommended size, & it had been running fine for a few months previously). I replaced it with another 30 amp fuse, turned down the gain (yes, they're exactly equal on both amps), & tried again. The fuse blew again. I replaced it once more, turned both gains all the way down, then up just a tiny bit, & tried once more. I turned my reciever on, & with the volume at zero, I heard a pop, turned around & saw the amp smoking. The other is still running fine.

Both amps are running through the same EQ, with the same 8 AWG power & ground cable, etc. Absolutely everything between the two is equal except for one thing...I have a 1 Farad cap connected to the amp that didn't blow.

Anyone have any clue why the amp fried? Sorry for the long message, but I wanted to give as much info as possible. Thanx in advance.

I would never try to power a single DVC with two separate amplifiers even if they are both the same model and make ( unless they are digital amps ). Analog amplifiers just can't handle the load and the fact that they have to perform the exact same power output to the subwoofer when the signal is delivered otherwise the weaker of the two will get feedback from the other amplifier.

The Amp fried b/c of a power issue, the amp was trying to draw power and there was not enough...  thats really how amps blow is from lack of power to the internals...  or basicly when there is not enough power the internals start getting hot. hot enough to fry the internals...  The independece must have been low enough for it to draw that much power.  The other amp was fine b/c it had the cap on it, it had enough voltage across the amp so it was fine... i guess that you must have turned off the deck(amp's) when you saw the amp fry.. that if you had left the deck on longer the other amp would fry too, or what it was saposed to do - blow the fuse.. the first sign was that the fuse blew twice, so that means that you are trying to use the amp out of its specification...  aka  independence levels..  the last fuse must have been fult'y so that it did not burn at what is was sposed to go..

Thats what I say..