amp blowing fuses

Hello, I've had my amplifiers and sytem installed for about 4 years now and never had a problem. The other day the amplifier for my subwoofer would not turn on. I check all RCA connectors, grounds and everything is ok. However the fuses were blown. I replace the 30 amp fuses and then turn on the truck the amp turned on them I could hear it blow both fuses, this was without any speakers hooked up to the amp. So is my AMP done? It is not a very costly amp Directed d1200. Any ideas? If I need a new one what would you recommend with 600w at 1 ohm? Also forgot to mention the amp for my components works fine and I can still listen to the radio! Thanks for any help!

You can get that amp repaired for much less than the cost of a new one.

Have any idea what might be wrong or the cost?

It sounds as though you have one or more shorted output transistors.  You should be able to get it repaired for around 100 to 150 dollars.

Below are photos of what I found when I opened up the amp. Anyone know what the small cracked black piece is call and where I can get one? also the back of the board has some discoloration in the solder, is this normal. Thanks for the help! https://i809.photobucket.com/albums/zz14/Vandals909/IMG_1979.jpg https://i809.photobucket.com/albums/zz14/Vandals909/IMG_1971.jpg

The cracked black piece is a masfet power supply transistor.  Chances are something took the power supply out.  Either shorted output transistors or a shorted transformer.  Just replacing the exploded part will probably not fix the amp.  Can you read the numbers silk screened on the front of the part?  If not, put some of the white nasty heat sink compound on the tip of your finger and rub the compound onto the front of the transistor then wipe it off.  You should now be able to see the number.  What is the number?