So the other day, my subwoofer started off booming as usual, but as time went on, the subwoofer slowly got softer and softer and softer until no sound came out of it at all. I checked everything and the amp has both of its 20 A fuses blown. I replaced them and when i turned it on, all the sub was doing was making a crackling sound everytime the song had a deep note. The bass was barely audible.

My questions:

1. is there a specific type of fuse you must put into car audio amps? I bought ATO type 20A fuses.

2. Is there a specific orientation that they have to be placed in

3. Is my sub blown?

My setup:

580 watt Dual amp, Clarion subwoofer 750 peak, single woofer enclosure and a 1.6 farad capacitor (the capacitor is holding charge around 13.5 and bounces as low as 12.5 when the bass hits. )