12 inch sub and amp MTX audio?

http://www.crutchfield.com/p_236TNP112D/MTX-TNP112D.html?tp=61893&awkw=75642995185&awat=pla&awnw=g&awcr=47668804105&awdv=c

That's the amp and sub I have in my Ford Focus, I think the fuse on it went out? I have an equalizer on my phone so IDK if that added too much power to the amp and burned the fuse. I went to best buy because that's where I had my installation, so i had free service for a fuse replacement, then it blew that one, guy at best buy gave me like a btter one but I don't think i blew it this time. It's just the amp that heats too much I guess.

Procedding to the question: I want and amp that the wattage is under the peak on link provided. I wanna push 400 watts at least, if not up to 700 or more if possible.

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