amp questions

the links didnt work for me.but ill assume you have single voice coil subs with a rating of 400 rms and 800 peak.for some good cheap power i would look into a jbl.600 or if you want to get a little more bumb a jbl.1200.i run a 1200 and a 80.4 in my truck and there great.
http://ikesound.com/category-category_id/122
this place got good prices. those subs wired down to 2 ohms would sound great with the 600! good luck