Z560 Fuse blown...


I blew 4 fuses on my Z560s now... it seems like they r not powerful enuff or something. the first one must have blown cuz of overheating, that was stock. THen i'm guessing the other 3 blew cuz they r wrong ones? They r from radio shack 4A 250V Slow Blow as indicated on the sub.. but 3 blew instantly. So wtf, can anyone figure out what's wrong? Do i need different fuses?


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