about a year ago, i bought the orion XtR 900. i had it hooked up to two kicker comp 12s. just about 3 weeks ago, my sister hooked it up to 1 12" solobaric, and it was working fine for about a week. I went to turn my stereo on and the amp wasnt working. i checked the fuses, and both of them were blown. Now, everytime i try to replace the fuses, they blow as soon as i put them into the amp. and sometimes they spark as i put them in. ANY ADVICE WOULD BE GREATLY APPRECIATED, because i have no clue what went wrong. THANKS FOR YOUR TIME