I have a Hifonics Bxi 1606D amp that is connected to 2 Kicker L7's. When I turn on my car the cd player turns on and the amp those as well. But in about 5 seconds the LED lights from the amp turns off and the fuse ends up blowing out. After the amp gets really hot. My amp was working fine a month ago but now it just keeps blowing out my fuse. I thought it was the bass knob because after I connected the bass knob the next day after my amp started with this problem.
If I were a guessing man, I'd guess that you had your amp hooked up in a bridged configuration. And also that you connected your two speakers in parallel (plus to plus and minus to minus). And if I were to further guess, I'd guess that you have a blown amp now because of what I mentioned above. Sounds like you need to spend some quality time with your favorite electronic repair shop. Good luck.
SOURCE: Hifonics BXI 1606D problems
it may be a wiring problem you need to make sure all the speaker positives and negatives are correct. I sell alot of hifonics amps and have never had 1 do that. it may also be a bad rca cable. if it only does it when you use the filter i would say not to use it also make sure the gain is no more than 3/4 turned up and the bass boost no more than 1/2. if you have a dif amp try a temp setup using it and if it still does it its a wiring issue. also try 1 speaker at a time on the hifonics and keep adding 1 till it comes back it may be a bad voice coil on 1 sub .
Usually answered in minutes!